S21 postcode district: Killamarsh and around, Derbyshire

S21 is a postcode district in Derbyshire, with 467 postcodes in use in 5 sectors. It has postcodes in Killamarsh and Eckington. It is split between 3 councils: North East Derbyshire (459 postcodes), Bolsover (7) and Chesterfield (1).

Postcodes in use
467
Sectors
5
Councils
3 councils
Places
2 places

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in S21, by flood risk

Map of every postcode in S21, by flood risk Of the 467 postcodes in S21 that ONS places, 13 have a home or business at high risk, 5 are at medium risk at worst, 7 are at low risk at worst, 11 are at very low risk only and 431 are not on the Environment Agency's at-risk list. Places named: Killamarsh, Eckington. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A6135 S21 1AA: not on the flood risk listS21 1AB: not on the flood risk listS21 1AD: not on the flood risk listS21 1AE: not on the flood risk listS21 1AF: not on the flood risk listS21 1AG: not on the flood risk listS21 1AH: not on the flood risk listS21 1AL: not on the flood risk listS21 1AN: not on the flood risk listS21 1AP: not on the flood risk listS21 1AQ: not on the flood risk listS21 1AR: not on the flood risk listS21 1AT: not on the flood risk listS21 1AW: not on the flood risk listS21 1AX: not on the flood risk listS21 1AY: not on the flood risk listS21 1AZ: not on the flood risk listS21 1BA: not on the flood risk listS21 1BB: not on the flood risk listS21 1BD: not on the flood risk listS21 1BE: not on the flood risk listS21 1BF: not on the flood risk listS21 1BG: not on the flood risk listS21 1BH: not on the flood risk listS21 1BJ: not on the flood risk listS21 1BL: not on the flood risk listS21 1BN: not on the flood risk listS21 1BP: not on the flood risk listS21 1BQ: not on the flood risk listS21 1BR: not on the flood risk listS21 1BS: not on the flood risk listS21 1BT: not on the flood risk listS21 1BW: not on the flood risk listS21 1BX: not on the flood risk listS21 1BY: not on the flood risk listS21 1DA: not on the flood risk listS21 1DB: not on the flood risk listS21 1DD: not on the flood risk listS21 1DE: not on the flood risk listS21 1DF: not on the flood risk listS21 1DG: not on the flood risk listS21 1DH: not on the flood risk listS21 1DJ: not on the flood risk listS21 1DL: not on the flood risk listS21 1DP: not on the flood risk listS21 1DQ: not on the flood risk listS21 1DR: not on the flood risk listS21 1DS: not on the flood risk listS21 1DT: not on the flood risk listS21 1DU: not on the flood risk listS21 1DW: not on the flood risk listS21 1EG: not on the flood risk listS21 1EH: not on the flood risk listS21 1EJ: not on the flood risk listS21 1EL: not on the flood risk listS21 1EP: not on the flood risk listS21 1ER: not on the flood risk listS21 1ET: not on the flood risk listS21 1EU: not on the flood risk listS21 1EW: not on the flood risk listS21 1EX: not on the flood risk listS21 1EY: not on the flood risk listS21 1FA: not on the flood risk listS21 1FD: not on the flood risk listS21 1FE: not on the flood risk listS21 1FF: not on the flood risk listS21 1FG: not on the flood risk listS21 1FH: not on the flood risk listS21 1FJ: not on the flood risk listS21 1FL: not on the flood risk listS21 1FP: not on the flood risk listS21 1FQ: not on the flood risk listS21 1FS: not on the flood risk listS21 1FU: not on the flood risk listS21 1FW: not on the flood risk listS21 1FX: not on the flood risk listS21 1FY: not on the flood risk listS21 1FZ: not on the flood risk listS21 1GA: not on the flood risk listS21 1GB: not on the flood risk listS21 1GD: not on the flood risk listS21 1GE: not on the flood risk listS21 1GF: not on the flood risk listS21 1GH: not on the flood risk listS21 1GJ: not on the flood risk listS21 1GL: not on the flood risk listS21 1GN: not on the flood risk listS21 1GP: not on the flood risk listS21 1GQ: not on the flood risk listS21 1GS: not on the flood risk listS21 1GU: not on the flood risk listS21 1GW: not on the flood risk listS21 1GX: not on the flood risk listS21 1GY: not on the flood risk listS21 1HA: not on the flood risk listS21 1HB: not on the flood risk listS21 1HD: not on the flood risk listS21 1HE: not on the flood risk listS21 1HF: not on the flood risk listS21 1HH: not on the flood risk listS21 1HL: not on the flood risk listS21 1HN: not on the flood risk listS21 1HP: not on the flood risk listS21 1HQ: not on the flood risk listS21 1HR: not on the flood risk listS21 1HS: not on the flood risk listS21 1HT: not on the flood risk listS21 1HU: not on the flood risk listS21 1HW: not on the flood risk listS21 1HY: not on the flood risk listS21 1HZ: not on the flood risk listS21 1JA: not on the flood risk listS21 1JD: not on the flood risk listS21 1JF: not on the flood risk listS21 1JG: not on the flood risk listS21 1JH: not on the flood risk listS21 1JL: not on the flood risk listS21 1JN: not on the flood risk listS21 1JQ: not on the flood risk listS21 1JR: not on the flood risk listS21 1JS: not on the flood risk listS21 1JT: not on the flood risk listS21 1JU: not on the flood risk listS21 1JW: not on the flood risk listS21 1LB: not on the flood risk listS21 1LD: not on the flood risk listS21 1LF: not on the flood risk listS21 1LG: not on the flood risk listS21 1LH: not on the flood risk listS21 1LX: not on the flood risk listS21 1NF: not on the flood risk listS21 1NJ: not on the flood risk listS21 1NN: not on the flood risk listS21 1SH: not on the flood risk listS21 1SP: not on the flood risk listS21 1SW: not on the flood risk listS21 1SX: not on the flood risk listS21 1TA: not on the flood risk listS21 1TB: not on the flood risk listS21 1TD: not on the flood risk listS21 1TF: not on the flood risk listS21 1TG: not on the flood risk listS21 1TH: not on the flood risk listS21 1TQ: not on the flood risk listS21 1TW: not on the flood risk listS21 1TZ: not on the flood risk listS21 2AB: not on the flood risk listS21 2AD: not on the flood risk listS21 2AE: not on the flood risk listS21 2AT: not on the flood risk listS21 2BB: not on the flood risk listS21 2BU: not on the flood risk listS21 2BW: not on the flood risk listS21 2BX: not on the flood risk listS21 2BY: not on the flood risk listS21 2DD: not on the flood risk listS21 2DE: not on the flood risk listS21 2DF: not on the flood risk listS21 2DJ: not on the flood risk listS21 2DL: not on the flood risk listS21 2DT: not on the flood risk listS21 2DX: not on the flood risk listS21 2EA: not on the flood risk listS21 2EG: not on the flood risk listS21 2EH: not on the flood risk listS21 2EX: not on the flood risk listS21 2EZ: not on the flood risk listS21 2FA: not on the flood risk listS21 2HB: not on the flood risk listS21 2JF: not on the flood risk listS21 2JG: not on the flood risk listS21 2JU: not on the flood risk listS21 2JW: not on the flood risk listS21 3TE: not on the flood risk listS21 3TF: not on the flood risk listS21 3UA: not on the flood risk listS21 3UB: not on the flood risk listS21 3UD: not on the flood risk listS21 3UE: not on the flood risk listS21 3UF: not on the flood risk listS21 3UG: not on the flood risk listS21 3UH: not on the flood risk listS21 3UJ: not on the flood risk listS21 3UN: not on the flood risk listS21 3UP: not on the flood risk listS21 3UQ: not on the flood risk listS21 3UR: not on the flood risk listS21 3US: not on the flood risk listS21 3UT: not on the flood risk listS21 3UU: not on the flood risk listS21 3UW: not on the flood risk listS21 3UY: not on the flood risk listS21 3WA: not on the flood risk listS21 3WE: not on the flood risk listS21 3WF: not on the flood risk listS21 3WG: not on the flood risk listS21 3WH: not on the flood risk listS21 3WJ: not on the flood risk listS21 3WN: not on the flood risk listS21 3WP: not on the flood risk listS21 3WR: not on the flood risk listS21 3WS: not on the flood risk listS21 3WT: not on the flood risk listS21 3WU: not on the flood risk listS21 3WW: not on the flood risk listS21 3WX: not on the flood risk listS21 3WY: not on the flood risk listS21 3YA: not on the flood risk listS21 3YB: not on the flood risk listS21 3YD: not on the flood risk listS21 3YE: not on the flood risk listS21 3YF: not on the flood risk listS21 3YG: not on the flood risk listS21 3YH: not on the flood risk listS21 3YL: not on the flood risk listS21 3YN: not on the flood risk listS21 3YQ: not on the flood risk listS21 4AA: not on the flood risk listS21 4AB: not on the flood risk listS21 4AD: not on the flood risk listS21 4AE: not on the flood risk listS21 4AF: not on the flood risk listS21 4AG: not on the flood risk listS21 4AH: not on the flood risk listS21 4AJ: not on the flood risk listS21 4AL: not on the flood risk listS21 4AN: not on the flood risk listS21 4AP: not on the flood risk listS21 4AQ: not on the flood risk listS21 4AR: not on the flood risk listS21 4AS: not on the flood risk listS21 4AT: not on the flood risk listS21 4AU: not on the flood risk listS21 4AW: not on the flood risk listS21 4AX: not on the flood risk listS21 4AZ: not on the flood risk listS21 4BA: not on the flood risk listS21 4BB: not on the flood risk listS21 4BD: not on the flood risk listS21 4BE: not on the flood risk listS21 4BF: not on the flood risk listS21 4BG: not on the flood risk listS21 4BJ: not on the flood risk listS21 4BL: not on the flood risk listS21 4BN: not on the flood risk listS21 4BQ: not on the flood risk listS21 4BR: not on the flood risk listS21 4BS: not on the flood risk listS21 4BT: not on the flood risk listS21 4BU: not on the flood risk listS21 4BW: not on the flood risk listS21 4BX: not on the flood risk listS21 4BY: not on the flood risk listS21 4BZ: not on the flood risk listS21 4DA: not on the flood risk listS21 4DB: not on the flood risk listS21 4DD: not on the flood risk listS21 4DE: not on the flood risk listS21 4DF: not on the flood risk listS21 4DG: not on the flood risk listS21 4DH: not on the flood risk listS21 4DL: not on the flood risk listS21 4DN: not on the flood risk listS21 4DQ: not on the flood risk listS21 4DR: not on the flood risk listS21 4DS: not on the flood risk listS21 4DT: not on the flood risk listS21 4DU: not on the flood risk listS21 4DW: not on the flood risk listS21 4DX: not on the flood risk listS21 4DY: not on the flood risk listS21 4DZ: not on the flood risk listS21 4EA: not on the flood risk listS21 4ED: not on the flood risk listS21 4EF: not on the flood risk listS21 4EG: not on the flood risk listS21 4EH: not on the flood risk listS21 4EJ: not on the flood risk listS21 4EL: not on the flood risk listS21 4EN: not on the flood risk listS21 4EP: not on the flood risk listS21 4EQ: not on the flood risk listS21 4ES: not on the flood risk listS21 4EU: not on the flood risk listS21 4EW: not on the flood risk listS21 4EX: not on the flood risk listS21 4EY: not on the flood risk listS21 4EZ: not on the flood risk listS21 4FA: not on the flood risk listS21 4FD: not on the flood risk listS21 4FG: not on the flood risk listS21 4FJ: not on the flood risk listS21 4FL: not on the flood risk listS21 4FN: not on the flood risk listS21 4FP: not on the flood risk listS21 4FQ: not on the flood risk listS21 4FR: not on the flood risk listS21 4FS: not on the flood risk listS21 4FU: not on the flood risk listS21 4FX: not on the flood risk listS21 4FY: not on the flood risk listS21 4GA: not on the flood risk listS21 4GB: not on the flood risk listS21 4GD: not on the flood risk listS21 4GE: not on the flood risk listS21 4GF: not on the flood risk listS21 4GG: not on the flood risk listS21 4GJ: not on the flood risk listS21 4GL: not on the flood risk listS21 4GN: not on the flood risk listS21 4GP: not on the flood risk listS21 4GQ: not on the flood risk listS21 4GR: not on the flood risk listS21 4GS: not on the flood risk listS21 4GT: not on the flood risk listS21 4GU: not on the flood risk listS21 4GW: not on the flood risk listS21 4GX: not on the flood risk listS21 4GY: not on the flood risk listS21 4GZ: not on the flood risk listS21 4HA: not on the flood risk listS21 4HB: not on the flood risk listS21 4HD: not on the flood risk listS21 4HE: not on the flood risk listS21 4HF: not on the flood risk listS21 4HG: not on the flood risk listS21 4HH: not on the flood risk listS21 4HJ: not on the flood risk listS21 4HN: not on the flood risk listS21 4HP: not on the flood risk listS21 4HQ: not on the flood risk listS21 4HR: not on the flood risk listS21 4HT: not on the flood risk listS21 4HU: not on the flood risk listS21 4HW: not on the flood risk listS21 4HX: not on the flood risk listS21 4HY: not on the flood risk listS21 4HZ: not on the flood risk listS21 4JA: not on the flood risk listS21 4JB: not on the flood risk listS21 4JD: not on the flood risk listS21 4JE: not on the flood risk listS21 4JF: not on the flood risk listS21 4JG: not on the flood risk listS21 4JR: not on the flood risk listS21 4JT: not on the flood risk listS21 4JU: not on the flood risk listS21 4JW: not on the flood risk listS21 4JX: not on the flood risk listS21 4JZ: not on the flood risk listS21 4LA: not on the flood risk listS21 4LB: not on the flood risk listS21 4LE: not on the flood risk listS21 4LF: not on the flood risk listS21 4LG: not on the flood risk listS21 4LH: not on the flood risk listS21 4LJ: not on the flood risk listS21 4LP: not on the flood risk listS21 4LQ: not on the flood risk listS21 4LT: not on the flood risk listS21 4WZ: not on the flood risk listS21 4YF: not on the flood risk listS21 5AB: not on the flood risk listS21 5AD: not on the flood risk listS21 5RA: not on the flood risk listS21 5RB: not on the flood risk listS21 5RD: not on the flood risk listS21 5RE: not on the flood risk listS21 5RF: not on the flood risk listS21 5RG: not on the flood risk listS21 5RH: not on the flood risk listS21 5RL: not on the flood risk listS21 5RN: not on the flood risk listS21 5RP: not on the flood risk listS21 5RQ: not on the flood risk listS21 5RR: not on the flood risk listS21 5RS: not on the flood risk listS21 5RT: not on the flood risk listS21 5RU: not on the flood risk listS21 5RW: not on the flood risk listS21 5RX: not on the flood risk listS21 5RY: not on the flood risk listS21 5RZ: not on the flood risk listS21 5SA: not on the flood risk listS21 5SB: not on the flood risk listS21 5SD: not on the flood risk listS21 1DN: very low flood risk onlyS21 1DZ: very low flood risk onlyS21 1EA: very low flood risk onlyS21 1EB: very low flood risk onlyS21 1EE: very low flood risk onlyS21 1EF: very low flood risk onlyS21 1EN: very low flood risk onlyS21 1ES: very low flood risk onlyS21 1HX: very low flood risk onlyS21 1TE: very low flood risk onlyS21 1DX: low flood risk at worstS21 1DY: low flood risk at worstS21 1ED: low flood risk at worstS21 2DR: low flood risk at worstS21 2DS: low flood risk at worstS21 4BH: low flood risk at worstS21 1AS: medium flood risk at worstS21 3TX: medium flood risk at worstS21 3UZ: medium flood risk at worstS21 1AU: high flood riskS21 1BZ: high flood riskS21 1GZ: high flood riskS21 1JB: high flood riskS21 3JS: high flood riskS21 3TY: high flood riskS21 3UL: high flood riskS21 3UX: high flood riskS21 3WB: high flood riskS21 4FH: high flood riskS21 4HL: high flood riskS21 4LN: high flood riskS21 4LS: high flood risk KillamarshEckington Map of every postcode in S21, by flood risk Of the 467 postcodes in S21 that ONS places, 13 have a home or business at high risk, 5 are at medium risk at worst, 7 are at low risk at worst, 11 are at very low risk only and 431 are not on the Environment Agency's at-risk list. Places named: Killamarsh, Eckington. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. KillamarshEckington
  • A home or business at high risk: 13
  • At medium risk at worst: 5
  • At low risk at worst: 7
  • At very low risk only: 11
  • Not on the at-risk list: 431

Of the 467 postcodes in S21 that ONS places, 13 have a home or business at high risk, 5 are at medium risk at worst, 7 are at low risk at worst, 11 are at very low risk only and 431 are not on the Environment Agency's at-risk list.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

The middle of its postcodes: latitude 53.3122, longitude -1.3390. Open this area on OpenStreetMap

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

The postcodes at high risk

13 postcodes here have a home or business at high risk. These are the 12 with the most homes and businesses at that risk.

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

S21 4HL17 at high riskS21 3UL7 at high riskS21 4FH6 at high riskS21 1BZ6 at high riskS21 3JS6 at high riskS21 1GZ5 at high riskS21 3TY5 at high riskS21 4LS4 at high riskS21 3UX3 at high riskS21 4LN3 at high riskS21 1JB2 at high riskS21 1AU2 at high risk

What broadband can you get in S21?

Ofcom reports on 456 of the 467 postcodes in S21. At 319 of them every home and business can get gigabit broadband, and at 2 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit319 of 456
Postcodes where every home can get superfast420 of 456
Postcodes where some cannot get decent broadband2 of 456

Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.

Check one address on Ofcom's checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

Is S21 at risk of flooding?

36 of the 467 postcodes in S21 have a home or business in an area at risk of flooding from rivers or the sea, the Environment Agency says. At those, it puts 117 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 36 of 467 postcodes High: 68Medium: 49Low: 41Very low: 205

High: 3.3% or more a year (1 in 30). Medium: 1% to 3.3% a year. Low: 0.1% to 1% a year. Very low: under 0.1% a year (1 in 1,000). Each band is the chance of flooding in any one year.

Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.

Source: Environment Agency, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it

What do homes sell for in S21?

Homes in S21 sold for a typical £217,500 in the 12 months to August 2026, across 212 sales, up 11.3% on the 12 months before, HM Land Registry's figures show.

£217,500 typical price, the 12 months to August 2026
£195,500 12 months to August 2025
▲ up 11.3% on the 12 months before
  • Detached £306,250 78 sales
  • Semi-detached £185,000 79 sales
  • Terraced £166,250 42 sales
  • Flat or maisonette £120,000 13 sales

Each bar is that kind's typical price, against the most expensive kind here.

Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.

Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it

Postcodes in S21

Pick a sector, then a postcode. A sector is the district plus the next digit.

S21 1187 postcodesS21 231 postcodesS21 355 postcodesS21 4170 postcodesS21 524 postcodes
UK postcode format explained

Places in S21

Towns and villages with postcodes in S21, and how many each has here.

Killamarsh postcodes,200Eckington postcodes,164

Who covers S21

How many of the district's postcodes in use fall under each council, constituency and police force area.

Councils

What council am I in?

Constituencies

  • North East Derbyshire460
  • Bolsover7

Police force areas

  • Derbyshire467

Next to S21

S20 postcode district S25 postcode district All S districts Killamarsh postcodes

"Next to" is by number: the districts before and after S21 in the S area.

Check a postcode

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