YO
30 districts, 19,276 postcodes
North Yorkshire, York, East Riding of Yorkshire
| District | Postcodes | Local authority |
|---|---|---|
| YO1 | 439 | York |
| YO10 | 643 | York |
| YO11 | 792 | North Yorkshire |
| YO12 | 889 | North Yorkshire |
| YO13 | 419 | North Yorkshire |
| YO14 | 405 | North Yorkshire |
| YO15 | 493 | East Riding of Yorkshire |
| YO16 | 681 | East Riding of Yorkshire |
| YO17 | 834 | North Yorkshire |
| YO18 | 435 | North Yorkshire |
| YO19 | 493 | York |
| YO21 | 680 | North Yorkshire |
| YO22 | 443 | North Yorkshire |
| YO23 | 585 | York |
| YO24 | 697 | York |
| YO25 | 1,396 | East Riding of Yorkshire |
| YO26 | 885 | York |
| YO30 | 680 | York |
| YO31 | 810 | York |
| YO32 | 790 | York |
| YO41 | 439 | East Riding of Yorkshire |
| YO42 | 736 | East Riding of Yorkshire |
| YO43 | 484 | East Riding of Yorkshire |
| YO51 | 263 | North Yorkshire |
| YO60 | 257 | North Yorkshire |
| YO61 | 672 | North Yorkshire |
| YO62 | 623 | North Yorkshire |
| YO7 | 969 | North Yorkshire |
| YO8 | 1,334 | North Yorkshire |
| YO90 | 10 | York |