DN21 1 postcode sector in the DN21 district

DN21 1 is a sector of the DN21 district: every postcode that starts DN21 1. It has 372 postcodes in use, 9 of them large-user postcodes. A large-user postcode is one Royal Mail gives to a single address that gets a lot of mail.

Not sure what a sector is? UK postcode format explained.

Every postcode in the DN21 1 sector, by flood risk

Map of every postcode in the DN21 1 sector, by flood risk Of the 372 postcodes in the DN21 1 sector that ONS places, 4 have a home or business at high risk, 61 are at low risk at worst, 1 are at very low risk only and 306 are not on the Environment Agency's at-risk list. Places named: Gainsborough. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A631 DN21 1AE: not on the flood risk listDN21 1AR: not on the flood risk listDN21 1AS: not on the flood risk listDN21 1AT: not on the flood risk listDN21 1AU: not on the flood risk listDN21 1AW: not on the flood risk listDN21 1AX: not on the flood risk listDN21 1AZ: not on the flood risk listDN21 1BD: not on the flood risk listDN21 1BE: not on the flood risk listDN21 1BF: not on the flood risk listDN21 1BG: not on the flood risk listDN21 1BH: not on the flood risk listDN21 1BJ: not on the flood risk listDN21 1BL: not on the flood risk listDN21 1BP: not on the flood risk listDN21 1BS: not on the flood risk listDN21 1BT: not on the flood risk listDN21 1BU: not on the flood risk listDN21 1BW: not on the flood risk listDN21 1BX: not on the flood risk listDN21 1BZ: not on the flood risk listDN21 1DA: not on the flood risk listDN21 1DB: not on the flood risk listDN21 1DD: not on the flood risk listDN21 1DU: not on the flood risk listDN21 1DX: not on the flood risk listDN21 1DY: not on the flood risk listDN21 1DZ: not on the flood risk listDN21 1EB: not on the flood risk listDN21 1ED: not on the flood risk listDN21 1EE: not on the flood risk listDN21 1EF: not on the flood risk listDN21 1EG: not on the flood risk listDN21 1EH: not on the flood risk listDN21 1EJ: not on the flood risk listDN21 1EL: not on the flood risk listDN21 1EN: not on the flood risk listDN21 1EP: not on the flood risk listDN21 1EQ: not on the flood risk listDN21 1ER: not on the flood risk listDN21 1ES: not on the flood risk listDN21 1ET: not on the flood risk listDN21 1EU: not on the flood risk listDN21 1EW: not on the flood risk listDN21 1EX: not on the flood risk listDN21 1EY: not on the flood risk listDN21 1EZ: not on the flood risk listDN21 1FA: not on the flood risk listDN21 1FB: not on the flood risk listDN21 1FD: not on the flood risk listDN21 1FE: not on the flood risk listDN21 1FF: not on the flood risk listDN21 1FG: not on the flood risk listDN21 1FH: not on the flood risk listDN21 1FJ: not on the flood risk listDN21 1FL: not on the flood risk listDN21 1FN: not on the flood risk listDN21 1FP: not on the flood risk listDN21 1FQ: not on the flood risk listDN21 1FR: not on the flood risk listDN21 1FS: not on the flood risk listDN21 1FT: not on the flood risk listDN21 1FU: not on the flood risk listDN21 1FW: not on the flood risk listDN21 1FX: not on the flood risk listDN21 1FY: not on the flood risk listDN21 1FZ: not on the flood risk listDN21 1GA: not on the flood risk listDN21 1GB: not on the flood risk listDN21 1GD: not on the flood risk listDN21 1GE: not on the flood risk listDN21 1GF: not on the flood risk listDN21 1GH: not on the flood risk listDN21 1GJ: not on the flood risk listDN21 1GL: not on the flood risk listDN21 1GN: not on the flood risk listDN21 1GP: not on the flood risk listDN21 1GQ: not on the flood risk listDN21 1GR: not on the flood risk listDN21 1GS: not on the flood risk listDN21 1GT: not on the flood risk listDN21 1GU: not on the flood risk listDN21 1GW: not on the flood risk listDN21 1GX: not on the flood risk listDN21 1GY: not on the flood risk listDN21 1GZ: not on the flood risk listDN21 1HA: not on the flood risk listDN21 1HB: not on the flood risk listDN21 1HD: not on the flood risk listDN21 1HE: not on the flood risk listDN21 1HF: not on the flood risk listDN21 1HG: not on the flood risk listDN21 1HH: not on the flood risk listDN21 1HJ: not on the flood risk listDN21 1HL: not on the flood risk listDN21 1HN: not on the flood risk listDN21 1HP: not on the flood risk listDN21 1HQ: not on the flood risk listDN21 1HR: not on the flood risk listDN21 1HW: not on the flood risk listDN21 1HY: not on the flood risk listDN21 1JB: not on the flood risk listDN21 1JE: not on the flood risk listDN21 1JG: not on the flood risk listDN21 1JX: not on the flood risk listDN21 1LT: not on the flood risk listDN21 1LW: not on the flood risk listDN21 1LY: not on the flood risk listDN21 1NB: not on the flood risk listDN21 1NF: not on the flood risk listDN21 1NH: not on the flood risk listDN21 1NJ: not on the flood risk listDN21 1NL: not on the flood risk listDN21 1NN: not on the flood risk listDN21 1NP: not on the flood risk listDN21 1NR: not on the flood risk listDN21 1NT: not on the flood risk listDN21 1NU: not on the flood risk listDN21 1NW: not on the flood risk listDN21 1NX: not on the flood risk listDN21 1NY: not on the flood risk listDN21 1NZ: not on the flood risk listDN21 1PA: not on the flood risk listDN21 1PB: not on the flood risk listDN21 1PD: not on the flood risk listDN21 1PE: not on the flood risk listDN21 1PF: not on the flood risk listDN21 1PG: not on the flood risk listDN21 1PH: not on the flood risk listDN21 1PJ: not on the flood risk listDN21 1PL: not on the flood risk listDN21 1PN: not on the flood risk listDN21 1PP: not on the flood risk listDN21 1PQ: not on the flood risk listDN21 1PR: not on the flood risk listDN21 1PS: not on the flood risk listDN21 1PT: not on the flood risk listDN21 1PU: not on the flood risk listDN21 1PW: not on the flood risk listDN21 1PX: not on the flood risk listDN21 1PZ: not on the flood risk listDN21 1QA: not on the flood risk listDN21 1QB: not on the flood risk listDN21 1QD: not on the flood risk listDN21 1QF: not on the flood risk listDN21 1QG: not on the flood risk listDN21 1QH: not on the flood risk listDN21 1QJ: not on the flood risk listDN21 1QL: not on the flood risk listDN21 1QP: not on the flood risk listDN21 1QR: not on the flood risk listDN21 1QS: not on the flood risk listDN21 1QT: not on the flood risk listDN21 1QW: not on the flood risk listDN21 1QX: not on the flood risk listDN21 1QY: not on the flood risk listDN21 1QZ: not on the flood risk listDN21 1RA: not on the flood risk listDN21 1RB: not on the flood risk listDN21 1RD: not on the flood risk listDN21 1RE: not on the flood risk listDN21 1RF: not on the flood risk listDN21 1RG: not on the flood risk listDN21 1RH: not on the flood risk listDN21 1RJ: not on the flood risk listDN21 1RL: not on the flood risk listDN21 1RN: not on the flood risk listDN21 1RP: not on the flood risk listDN21 1RQ: not on the flood risk listDN21 1RR: not on the flood risk listDN21 1RS: not on the flood risk listDN21 1RT: not on the flood risk listDN21 1RU: not on the flood risk listDN21 1RW: not on the flood risk listDN21 1RX: not on the flood risk listDN21 1RY: not on the flood risk listDN21 1RZ: not on the flood risk listDN21 1SA: not on the flood risk listDN21 1SB: not on the flood risk listDN21 1SD: not on the flood risk listDN21 1SE: not on the flood risk listDN21 1SF: not on the flood risk listDN21 1SG: not on the flood risk listDN21 1SH: not on the flood risk listDN21 1SJ: not on the flood risk listDN21 1SL: not on the flood risk listDN21 1SN: not on the flood risk listDN21 1SP: not on the flood risk listDN21 1SQ: not on the flood risk listDN21 1SR: not on the flood risk listDN21 1SS: not on the flood risk listDN21 1ST: not on the flood risk listDN21 1SU: not on the flood risk listDN21 1SW: not on the flood risk listDN21 1SX: not on the flood risk listDN21 1SY: not on the flood risk listDN21 1SZ: not on the flood risk listDN21 1TA: not on the flood risk listDN21 1TB: not on the flood risk listDN21 1TD: not on the flood risk listDN21 1TE: not on the flood risk listDN21 1TF: not on the flood risk listDN21 1TG: not on the flood risk listDN21 1TH: not on the flood risk listDN21 1TJ: not on the flood risk listDN21 1TL: not on the flood risk listDN21 1TN: not on the flood risk listDN21 1TP: not on the flood risk listDN21 1TQ: not on the flood risk listDN21 1TR: not on the flood risk listDN21 1TS: not on the flood risk listDN21 1TT: not on the flood risk listDN21 1TU: not on the flood risk listDN21 1TY: not on the flood risk listDN21 1TZ: not on the flood risk listDN21 1UA: not on the flood risk listDN21 1UB: not on the flood risk listDN21 1UD: not on the flood risk listDN21 1UE: not on the flood risk listDN21 1UF: not on the flood risk listDN21 1UG: not on the flood risk listDN21 1UH: not on the flood risk listDN21 1UL: not on the flood risk listDN21 1UN: not on the flood risk listDN21 1UP: not on the flood risk listDN21 1UQ: not on the flood risk listDN21 1UR: not on the flood risk listDN21 1UT: not on the flood risk listDN21 1UU: not on the flood risk listDN21 1UW: not on the flood risk listDN21 1UX: not on the flood risk listDN21 1UY: not on the flood risk listDN21 1UZ: not on the flood risk listDN21 1WA: not on the flood risk listDN21 1WB: not on the flood risk listDN21 1WD: not on the flood risk listDN21 1WE: not on the flood risk listDN21 1WF: not on the flood risk listDN21 1WG: not on the flood risk listDN21 1WH: not on the flood risk listDN21 1WJ: not on the flood risk listDN21 1WL: not on the flood risk listDN21 1WN: not on the flood risk listDN21 1WP: not on the flood risk listDN21 1WQ: not on the flood risk listDN21 1WR: not on the flood risk listDN21 1WS: not on the flood risk listDN21 1WT: not on the flood risk listDN21 1WU: not on the flood risk listDN21 1WW: not on the flood risk listDN21 1WZ: not on the flood risk listDN21 1XA: not on the flood risk listDN21 1XB: not on the flood risk listDN21 1XD: not on the flood risk listDN21 1XE: not on the flood risk listDN21 1XF: not on the flood risk listDN21 1XG: not on the flood risk listDN21 1XH: not on the flood risk listDN21 1XJ: not on the flood risk listDN21 1XL: not on the flood risk listDN21 1XN: not on the flood risk listDN21 1XP: not on the flood risk listDN21 1XQ: not on the flood risk listDN21 1XR: not on the flood risk listDN21 1XU: not on the flood risk listDN21 1XW: not on the flood risk listDN21 1XY: not on the flood risk listDN21 1XZ: not on the flood risk listDN21 1YA: not on the flood risk listDN21 1YB: not on the flood risk listDN21 1YD: not on the flood risk listDN21 1YE: not on the flood risk listDN21 1YF: not on the flood risk listDN21 1YG: not on the flood risk listDN21 1YH: not on the flood risk listDN21 1YJ: not on the flood risk listDN21 1YL: not on the flood risk listDN21 1YN: not on the flood risk listDN21 1YP: not on the flood risk listDN21 1YQ: not on the flood risk listDN21 1YR: not on the flood risk listDN21 1YS: not on the flood risk listDN21 1YT: not on the flood risk listDN21 1YU: not on the flood risk listDN21 1YW: not on the flood risk listDN21 1YX: not on the flood risk listDN21 1YY: not on the flood risk listDN21 1YZ: not on the flood risk listDN21 1ZA: not on the flood risk listDN21 1ZB: not on the flood risk listDN21 1ZD: not on the flood risk listDN21 1ZE: not on the flood risk listDN21 1ZF: not on the flood risk listDN21 1ZH: not on the flood risk listDN21 1ZJ: not on the flood risk listDN21 1ZL: not on the flood risk listDN21 1ZN: not on the flood risk listDN21 1ZP: not on the flood risk listDN21 1ZQ: not on the flood risk listDN21 1ZR: not on the flood risk listDN21 1ZS: not on the flood risk listDN21 1DR: very low flood risk onlyDN21 1AA: low flood risk at worstDN21 1AB: low flood risk at worstDN21 1AD: low flood risk at worstDN21 1AF: low flood risk at worstDN21 1AH: low flood risk at worstDN21 1AJ: low flood risk at worstDN21 1AL: low flood risk at worstDN21 1AN: low flood risk at worstDN21 1AP: low flood risk at worstDN21 1AQ: low flood risk at worstDN21 1BA: low flood risk at worstDN21 1BB: low flood risk at worstDN21 1BY: low flood risk at worstDN21 1DE: low flood risk at worstDN21 1DF: low flood risk at worstDN21 1DG: low flood risk at worstDN21 1DH: low flood risk at worstDN21 1DJ: low flood risk at worstDN21 1DL: low flood risk at worstDN21 1DN: low flood risk at worstDN21 1DP: low flood risk at worstDN21 1DQ: low flood risk at worstDN21 1DS: low flood risk at worstDN21 1DW: low flood risk at worstDN21 1EA: low flood risk at worstDN21 1GG: low flood risk at worstDN21 1HS: low flood risk at worstDN21 1HT: low flood risk at worstDN21 1HX: low flood risk at worstDN21 1HZ: low flood risk at worstDN21 1JA: low flood risk at worstDN21 1JD: low flood risk at worstDN21 1JF: low flood risk at worstDN21 1JH: low flood risk at worstDN21 1JJ: low flood risk at worstDN21 1JL: low flood risk at worstDN21 1JN: low flood risk at worstDN21 1JQ: low flood risk at worstDN21 1JR: low flood risk at worstDN21 1JS: low flood risk at worstDN21 1JT: low flood risk at worstDN21 1JU: low flood risk at worstDN21 1JW: low flood risk at worstDN21 1JY: low flood risk at worstDN21 1JZ: low flood risk at worstDN21 1LA: low flood risk at worstDN21 1LB: low flood risk at worstDN21 1LD: low flood risk at worstDN21 1LE: low flood risk at worstDN21 1LH: low flood risk at worstDN21 1LJ: low flood risk at worstDN21 1LL: low flood risk at worstDN21 1LP: low flood risk at worstDN21 1LQ: low flood risk at worstDN21 1LR: low flood risk at worstDN21 1LS: low flood risk at worstDN21 1LU: low flood risk at worstDN21 1LZ: low flood risk at worstDN21 1NA: low flood risk at worstDN21 1ND: low flood risk at worstDN21 1AY: high flood riskDN21 1NE: high flood riskDN21 1NG: high flood riskDN21 1NQ: high flood risk Gainsborough Map of every postcode in the DN21 1 sector, by flood risk Of the 372 postcodes in the DN21 1 sector that ONS places, 4 have a home or business at high risk, 61 are at low risk at worst, 1 are at very low risk only and 306 are not on the Environment Agency's at-risk list. Places named: Gainsborough. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A159 Gainsborough
  • A home or business at high risk: 4
  • At medium risk at worst: 0
  • At low risk at worst: 61
  • At very low risk only: 1
  • Not on the at-risk list: 306

Of the 372 postcodes in the DN21 1 sector that ONS places, 4 have a home or business at high risk, 61 are at low risk at worst, 1 are at very low risk only and 306 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.

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

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

DN21 1NQ12 at high riskDN21 1AY9 at high riskDN21 1NG8 at high riskDN21 1NE5 at high risk

What do homes sell for in DN21 1?

Homes in DN21 1 sold for a typical £150,000 in the 12 months to August 2026, across 169 sales, down 9.1% on the 12 months before, HM Land Registry's figures show.

£150,000 typical price, the 12 months to August 2026
£164,998 12 months to August 2025
▼ down 9.1% on the 12 months before
  • Detached £227,500 38 sales
  • Semi-detached £171,500 48 sales
  • Terraced £107,750 74 sales
  • Flat or maisonette £76,000 9 sales

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

Standard sales of homes at market value at the postcodes that start DN21 1. A typical price is the median, the middle sale, given from 5 sales or more.

How we work this out: house prices by postcode

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 DN21 1

Pick a postcode to see its council and MP, broadband, flood risk, what homes sell for, council tax, the nearest schools and stations, and crime around it.

DN21 1AADN21 1ABDN21 1ADDN21 1AEDN21 1AFDN21 1AHDN21 1AJDN21 1ALDN21 1ANDN21 1APDN21 1AQDN21 1ARDN21 1ASDN21 1ATDN21 1AUDN21 1AWDN21 1AXDN21 1AYDN21 1AZDN21 1BADN21 1BBDN21 1BDDN21 1BEDN21 1BFDN21 1BGDN21 1BHDN21 1BJDN21 1BLDN21 1BNDN21 1BPDN21 1BQDN21 1BSDN21 1BTDN21 1BUDN21 1BWDN21 1BXDN21 1BYDN21 1BZDN21 1DADN21 1DBDN21 1DDDN21 1DEDN21 1DFDN21 1DGDN21 1DHDN21 1DJDN21 1DLDN21 1DNDN21 1DPDN21 1DQDN21 1DRDN21 1DSDN21 1DTDN21 1DUDN21 1DWDN21 1DXDN21 1DYDN21 1DZDN21 1EADN21 1EBDN21 1EDDN21 1EEDN21 1EFDN21 1EGDN21 1EHDN21 1EJDN21 1ELDN21 1ENDN21 1EPDN21 1EQDN21 1ERDN21 1ESDN21 1ETDN21 1EUDN21 1EWDN21 1EXDN21 1EYDN21 1EZDN21 1FADN21 1FBDN21 1FDDN21 1FEDN21 1FFDN21 1FGDN21 1FHDN21 1FJDN21 1FLDN21 1FNDN21 1FPDN21 1FQDN21 1FRDN21 1FSDN21 1FTDN21 1FUDN21 1FWDN21 1FXDN21 1FYDN21 1FZDN21 1GADN21 1GBDN21 1GDDN21 1GEDN21 1GFDN21 1GGDN21 1GHDN21 1GJDN21 1GLDN21 1GNDN21 1GPDN21 1GQDN21 1GRDN21 1GSDN21 1GTDN21 1GUDN21 1GWDN21 1GXDN21 1GYDN21 1GZDN21 1HADN21 1HBDN21 1HDDN21 1HEDN21 1HFDN21 1HGDN21 1HHDN21 1HJDN21 1HLDN21 1HNDN21 1HPDN21 1HQDN21 1HRDN21 1HSDN21 1HTDN21 1HWDN21 1HXDN21 1HYDN21 1HZDN21 1JADN21 1JBDN21 1JDDN21 1JEDN21 1JFDN21 1JGDN21 1JHDN21 1JJDN21 1JLDN21 1JNDN21 1JQDN21 1JRDN21 1JSDN21 1JTDN21 1JUDN21 1JWDN21 1JXDN21 1JYDN21 1JZDN21 1LADN21 1LBDN21 1LDDN21 1LEDN21 1LHDN21 1LJDN21 1LLDN21 1LNDN21 1LPDN21 1LQDN21 1LRDN21 1LSDN21 1LTDN21 1LUDN21 1LWDN21 1LYDN21 1LZDN21 1NADN21 1NBDN21 1NDDN21 1NEDN21 1NFDN21 1NGDN21 1NHDN21 1NJDN21 1NLDN21 1NNDN21 1NPDN21 1NQDN21 1NRDN21 1NSDN21 1NTDN21 1NUDN21 1NWDN21 1NXDN21 1NYDN21 1NZDN21 1PADN21 1PBDN21 1PDDN21 1PEDN21 1PFDN21 1PGDN21 1PHDN21 1PJDN21 1PLDN21 1PNDN21 1PPDN21 1PQDN21 1PRDN21 1PSDN21 1PTDN21 1PUDN21 1PWDN21 1PXDN21 1PZDN21 1QADN21 1QBDN21 1QDDN21 1QFDN21 1QGDN21 1QHDN21 1QJDN21 1QLDN21 1QPDN21 1QRDN21 1QSDN21 1QTDN21 1QWDN21 1QXDN21 1QYDN21 1QZDN21 1RADN21 1RBDN21 1RDDN21 1REDN21 1RFDN21 1RGDN21 1RHDN21 1RJDN21 1RLDN21 1RNDN21 1RPDN21 1RQDN21 1RRDN21 1RSDN21 1RTDN21 1RUDN21 1RWDN21 1RXDN21 1RYDN21 1RZDN21 1SADN21 1SBDN21 1SDDN21 1SEDN21 1SFDN21 1SGDN21 1SHDN21 1SJDN21 1SLDN21 1SNDN21 1SPDN21 1SQDN21 1SRDN21 1SSDN21 1STDN21 1SUDN21 1SWDN21 1SXDN21 1SYDN21 1SZDN21 1TADN21 1TBDN21 1TDDN21 1TEDN21 1TFDN21 1TGDN21 1THDN21 1TJDN21 1TLDN21 1TNDN21 1TPDN21 1TQDN21 1TRDN21 1TSDN21 1TTDN21 1TUDN21 1TYDN21 1TZDN21 1UADN21 1UBDN21 1UDDN21 1UEDN21 1UFDN21 1UGDN21 1UHDN21 1ULDN21 1UNDN21 1UPDN21 1UQDN21 1URDN21 1UTDN21 1UUDN21 1UWDN21 1UXDN21 1UYDN21 1UZDN21 1WADN21 1WBDN21 1WDDN21 1WEDN21 1WFDN21 1WGDN21 1WHDN21 1WJDN21 1WLDN21 1WNDN21 1WPDN21 1WQDN21 1WRDN21 1WSDN21 1WTDN21 1WUDN21 1WWDN21 1WZDN21 1XADN21 1XBDN21 1XDDN21 1XEDN21 1XFDN21 1XGDN21 1XHDN21 1XJDN21 1XLDN21 1XNDN21 1XPDN21 1XQDN21 1XRDN21 1XUDN21 1XWDN21 1XYDN21 1XZDN21 1YADN21 1YBDN21 1YDDN21 1YEDN21 1YFDN21 1YGDN21 1YHDN21 1YJDN21 1YLDN21 1YNDN21 1YPDN21 1YQDN21 1YRDN21 1YSDN21 1YTDN21 1YUDN21 1YWDN21 1YXDN21 1YYDN21 1YZDN21 1ZADN21 1ZBDN21 1ZDDN21 1ZEDN21 1ZFDN21 1ZHDN21 1ZJDN21 1ZLDN21 1ZNDN21 1ZPDN21 1ZQDN21 1ZRDN21 1ZS

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed. See all our data sources

What council am I in? The council, borough or local authority for a postcode, and the county council where there is one. What ward am I in? The ward for a postcode, with its council, constituency and parish.

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