LN9 postcode district: Horncastle and around, Lincolnshire

LN9 is a postcode district in Lincolnshire, with 402 postcodes in use in 3 sectors. It has postcodes in Horncastle. Its council is East Lindsey.

Postcodes in use
402
Sectors
3
Council
East Lindsey
Places
Horncastle

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

Every postcode in LN9, by flood risk

Map of every postcode in LN9, by flood risk Of the 402 postcodes in LN9 that ONS places, 16 have a home or business at high risk, 17 are at medium risk at worst, 25 are at low risk at worst, 8 are at very low risk only and 336 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 16 postcodes at high or medium risk. Places named: Horncastle. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. LN9 5AG: not on the flood risk listLN9 5AH: not on the flood risk listLN9 5AJ: not on the flood risk listLN9 5AP: not on the flood risk listLN9 5AS: not on the flood risk listLN9 5AU: not on the flood risk listLN9 5AW: not on the flood risk listLN9 5BB: not on the flood risk listLN9 5BD: not on the flood risk listLN9 5BE: not on the flood risk listLN9 5BF: not on the flood risk listLN9 5BH: not on the flood risk listLN9 5BQ: not on the flood risk listLN9 5DA: not on the flood risk listLN9 5DJ: not on the flood risk listLN9 5DL: not on the flood risk listLN9 5DQ: not on the flood risk listLN9 5ED: not on the flood risk listLN9 5EH: not on the flood risk listLN9 5EJ: not on the flood risk listLN9 5EN: not on the flood risk listLN9 5EP: not on the flood risk listLN9 5ES: not on the flood risk listLN9 5ET: not on the flood risk listLN9 5EU: not on the flood risk listLN9 5EX: not on the flood risk listLN9 5EZ: not on the flood risk listLN9 5FA: not on the flood risk listLN9 5FE: not on the flood risk listLN9 5FG: not on the flood risk listLN9 5FH: not on the flood risk listLN9 5FL: not on the flood risk listLN9 5FN: not on the flood risk listLN9 5FP: not on the flood risk listLN9 5FS: not on the flood risk listLN9 5GB: not on the flood risk listLN9 5GD: not on the flood risk listLN9 5GE: not on the flood risk listLN9 5GF: not on the flood risk listLN9 5JL: not on the flood risk listLN9 5JP: not on the flood risk listLN9 5JR: not on the flood risk listLN9 5JS: not on the flood risk listLN9 5JT: not on the flood risk listLN9 5JU: not on the flood risk listLN9 5JX: not on the flood risk listLN9 5JY: not on the flood risk listLN9 5JZ: not on the flood risk listLN9 5LA: not on the flood risk listLN9 5LB: not on the flood risk listLN9 5LL: not on the flood risk listLN9 5LN: not on the flood risk listLN9 5LP: not on the flood risk listLN9 5LU: not on the flood risk listLN9 5LY: not on the flood risk listLN9 5LZ: not on the flood risk listLN9 5NA: not on the flood risk listLN9 5NB: not on the flood risk listLN9 5ND: not on the flood risk listLN9 5NE: not on the flood risk listLN9 5NF: not on the flood risk listLN9 5NG: not on the flood risk listLN9 5NH: not on the flood risk listLN9 5NJ: not on the flood risk listLN9 5NL: not on the flood risk listLN9 5NN: not on the flood risk listLN9 5NP: not on the flood risk listLN9 5NR: not on the flood risk listLN9 5NS: not on the flood risk listLN9 5NT: not on the flood risk listLN9 5NU: not on the flood risk listLN9 5NX: not on the flood risk listLN9 5PA: not on the flood risk listLN9 5PB: not on the flood risk listLN9 5PE: not on the flood risk listLN9 5PG: not on the flood risk listLN9 5PH: not on the flood risk listLN9 5PJ: not on the flood risk listLN9 5PR: not on the flood risk listLN9 5PS: not on the flood risk listLN9 5PT: not on the flood risk listLN9 5PX: not on the flood risk listLN9 5PY: not on the flood risk listLN9 5PZ: not on the flood risk listLN9 5QA: not on the flood risk listLN9 5QB: not on the flood risk listLN9 5QD: not on the flood risk listLN9 5QE: not on the flood risk listLN9 5QG: not on the flood risk listLN9 5QH: not on the flood risk listLN9 5QJ: not on the flood risk listLN9 5QL: not on the flood risk listLN9 5QN: not on the flood risk listLN9 5QP: not on the flood risk listLN9 5QW: not on the flood risk listLN9 5RA: not on the flood risk listLN9 5RB: not on the flood risk listLN9 5RD: not on the flood risk listLN9 5RE: not on the flood risk listLN9 5RG: not on the flood risk listLN9 5RH: not on the flood risk listLN9 5RJ: not on the flood risk listLN9 5RL: not on the flood risk listLN9 5RN: not on the flood risk listLN9 5RP: not on the flood risk listLN9 5RQ: not on the flood risk listLN9 5RR: not on the flood risk listLN9 5RU: not on the flood risk listLN9 5RW: not on the flood risk listLN9 5RX: not on the flood risk listLN9 5RY: not on the flood risk listLN9 5SR: not on the flood risk listLN9 5SU: not on the flood risk listLN9 6AB: not on the flood risk listLN9 6AE: not on the flood risk listLN9 6AF: not on the flood risk listLN9 6AJ: not on the flood risk listLN9 6AL: not on the flood risk listLN9 6AN: not on the flood risk listLN9 6AQ: not on the flood risk listLN9 6AR: not on the flood risk listLN9 6AS: not on the flood risk listLN9 6AT: not on the flood risk listLN9 6AU: not on the flood risk listLN9 6AW: not on the flood risk listLN9 6BE: not on the flood risk listLN9 6BF: not on the flood risk listLN9 6BJ: not on the flood risk listLN9 6BL: not on the flood risk listLN9 6BN: not on the flood risk listLN9 6BS: not on the flood risk listLN9 6BT: not on the flood risk listLN9 6BU: not on the flood risk listLN9 6BY: not on the flood risk listLN9 6DA: not on the flood risk listLN9 6DD: not on the flood risk listLN9 6DF: not on the flood risk listLN9 6DH: not on the flood risk listLN9 6DZ: not on the flood risk listLN9 6EA: not on the flood risk listLN9 6EF: not on the flood risk listLN9 6EG: not on the flood risk listLN9 6EJ: not on the flood risk listLN9 6EL: not on the flood risk listLN9 6EN: not on the flood risk listLN9 6EP: not on the flood risk listLN9 6EQ: not on the flood risk listLN9 6ER: not on the flood risk listLN9 6EY: not on the flood risk listLN9 6FA: not on the flood risk listLN9 6FF: not on the flood risk listLN9 6FJ: not on the flood risk listLN9 6FL: not on the flood risk listLN9 6HZ: not on the flood risk listLN9 6JA: not on the flood risk listLN9 6JB: not on the flood risk listLN9 6JE: not on the flood risk listLN9 6JJ: not on the flood risk listLN9 6JL: not on the flood risk listLN9 6JP: not on the flood risk listLN9 6JS: not on the flood risk listLN9 6JT: not on the flood risk listLN9 6JX: not on the flood risk listLN9 6JY: not on the flood risk listLN9 6JZ: not on the flood risk listLN9 6LA: not on the flood risk listLN9 6LB: not on the flood risk listLN9 6LD: not on the flood risk listLN9 6LE: not on the flood risk listLN9 6LF: not on the flood risk listLN9 6LG: not on the flood risk listLN9 6LH: not on the flood risk listLN9 6LJ: not on the flood risk listLN9 6LL: not on the flood risk listLN9 6LN: not on the flood risk listLN9 6LP: not on the flood risk listLN9 6LR: not on the flood risk listLN9 6LS: not on the flood risk listLN9 6LT: not on the flood risk listLN9 6LU: not on the flood risk listLN9 6NE: not on the flood risk listLN9 6NG: not on the flood risk listLN9 6NJ: not on the flood risk listLN9 6NL: not on the flood risk listLN9 6NN: not on the flood risk listLN9 6NP: not on the flood risk listLN9 6NR: not on the flood risk listLN9 6NS: not on the flood risk listLN9 6NT: not on the flood risk listLN9 6NU: not on the flood risk listLN9 6NX: not on the flood risk listLN9 6PA: not on the flood risk listLN9 6PB: not on the flood risk listLN9 6PE: not on the flood risk listLN9 6PG: not on the flood risk listLN9 6PH: not on the flood risk listLN9 6PJ: not on the flood risk listLN9 6PQ: not on the flood risk listLN9 6PR: not on the flood risk listLN9 6PS: not on the flood risk listLN9 6PT: not on the flood risk listLN9 6PU: not on the flood risk listLN9 6PX: not on the flood risk listLN9 6QB: not on the flood risk listLN9 6QD: not on the flood risk listLN9 6QE: not on the flood risk listLN9 6QG: not on the flood risk listLN9 6QL: not on the flood risk listLN9 6QN: not on the flood risk listLN9 6QP: not on the flood risk listLN9 6QS: not on the flood risk listLN9 6QT: not on the flood risk listLN9 6QU: not on the flood risk listLN9 6QW: not on the flood risk listLN9 6RD: not on the flood risk listLN9 6RE: not on the flood risk listLN9 6RH: not on the flood risk listLN9 6RP: not on the flood risk listLN9 6RQ: not on the flood risk listLN9 6RX: not on the flood risk listLN9 6SB: not on the flood risk listLN9 6SD: not on the flood risk listLN9 5AF: very low flood risk onlyLN9 5AT: very low flood risk onlyLN9 6HU: very low flood risk onlyLN9 5AD: low flood risk at worstLN9 5AZ: low flood risk at worstLN9 5DW: low flood risk at worstLN9 5HA: low flood risk at worstLN9 5HF: low flood risk at worstLN9 5NW: low flood risk at worstLN9 5PN: low flood risk at worstLN9 5PP: low flood risk at worstLN9 5PU: low flood risk at worstLN9 5PW: low flood risk at worstLN9 5QF: low flood risk at worstLN9 5SA: low flood risk at worstLN9 6AZ: low flood risk at worstLN9 6HP: low flood risk at worstLN9 6JF: low flood risk at worstLN9 6JQ: low flood risk at worstLN9 6JU: low flood risk at worstLN9 5ST: medium flood risk at worstLN9 5BA: medium flood risk at worstLN9 5DG: medium flood risk at worstLN9 5DR: medium flood risk at worstLN9 5HW: medium flood risk at worstLN9 5JB: medium flood risk at worstLN9 5SB: medium flood risk at worstLN9 6AA: medium flood risk at worstLN9 6JG: medium flood risk at worstLN9 6QF: medium flood risk at worstLN9 6QR: medium flood risk at worstLN9 5HZ: high flood riskLN9 5BW: high flood riskLN9 5HU: high flood riskLN9 5JE: high flood riskLN9 5LX: high flood riskLN9 5PD: high flood riskLN9 5QQ: high flood riskLN9 5RS: high flood riskLN9 5RT: high flood riskLN9 5RZ: high flood riskLN9 6QQ: high flood riskLN9 6JD: high flood riskLN9 6JH: high flood riskLN9 6PN: high flood riskLN9 6PZ: high flood riskLN9 6QX: high flood risk Horncastle 16 postcodes at high or medium risk, outlined: this goes to LN9 5HZ, the one with most homes and businesses at high risk16 postcodes at high or medium risk Map of every postcode in LN9, by flood risk Of the 402 postcodes in LN9 that ONS places, 16 have a home or business at high risk, 17 are at medium risk at worst, 25 are at low risk at worst, 8 are at very low risk only and 336 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 16 postcodes at high or medium risk. Places named: Horncastle. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 5 km. Horncastle 16 postcodes at high or medium risk, outlined: this goes to LN9 5HZ, the one with most homes and businesses at high risk16 postcodes at high or medium risk
  • A home or business at high risk: 16
  • At medium risk at worst: 17
  • At low risk at worst: 25
  • At very low risk only: 8
  • Not on the at-risk list: 336
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 402 postcodes in LN9 that ONS places, 16 have a home or business at high risk, 17 are at medium risk at worst, 25 are at low risk at worst, 8 are at very low risk only and 336 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. A dashed outline shows where 5 or more lie within 200 metres of each other. It is not a boundary, and 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 53.2173, longitude -0.1116. 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

16 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.

LN9 5HZ5 at high riskLN9 5RS5 at high riskLN9 6JH4 at high riskLN9 5JE3 at high riskLN9 5RZ3 at high riskLN9 5BW1 at high riskLN9 5RT1 at high riskLN9 5HU1 at high riskLN9 6JD1 at high riskLN9 5LX1 at high riskLN9 5PD1 at high riskLN9 5QQ1 at high risk

Where the postcodes at high or medium risk lie together

  • 16 postcodes at high or medium risk, outlined on the map. LN9 5HZ, is the one with most homes and businesses at high risk.

What broadband can you get in LN9?

Ofcom reports on 395 of the 402 postcodes in LN9. At 194 of them every home and business can get gigabit broadband, and at 8 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit194 of 395
Postcodes where every home can get superfast297 of 395
Postcodes where some cannot get decent broadband8 of 395

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 LN9 at risk of flooding?

66 of the 402 postcodes in LN9 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 141 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 66 of 402 postcodes High: 31Medium: 110Low: 380Very low: 82

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 LN9?

Homes in LN9 sold for a typical £200,000 in the 12 months to August 2026, across 149 sales, down 12% on the 12 months before, HM Land Registry's figures show.

£200,000 typical price, the 12 months to August 2026
12 months to August 2025
£227,248
12 months to August 2026
£200,000

▼ down 12% on the 12 months before

Detached£260,000 77 sales
Semi-detached£184,750 32 sales
Terraced£152,500 36 sales
Flat or maisonette 4 sales, too few to price

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 LN9

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

LN9 5206 postcodesLN9 6193 postcodesLN9 93 postcodes
UK postcode format explained

Places in LN9

Towns and villages with postcodes in LN9, and how many each has here.

Horncastle postcodes,238

Who covers LN9

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

  • Louth and Horncastle402

Police force areas

  • Lincolnshire402

Next to LN9

LN8 postcode district LN10 postcode district All LN districts Horncastle postcodes

"Next to" is by number: the districts before and after LN9 in the LN area.

Check a postcode

Something wrong on this page? Report an error and we will check it against the source.