| Place | Postal Code |
|---|---|
| Aby, East Midlands) | LN13 |
| Acthorpe, East Midlands) | LN11 0SD |
| Acthorpe Top, East Midlands) | LN11 0RX |
| Addlethorpe, East Midlands) | PE24 |
| Ailby, East Midlands) | LN13 0EE |
| Alford, East Midlands) | LN13 |
| Alvingham, East Midlands) | LN11 |
| Anderby, East Midlands) | PE24 |
| Anderby Creek, East Midlands) | PE24 |
| Antons Gowt, East Midlands) | PE22 |
| Asgarby, East Midlands) | PE23 |
| Ashby-by-Partney, East Midlands) | PE23 |
| Ashby Puerorum, East Midlands) | LN9 6QU |
| Postal Codes in Lincolnshire | |
|---|---|
| Boston | |
| East Lindsey | |
| Lincoln | |
| North Kesteven | |
| South Holland | |
| South Kesteven | |
| West Lindsey | |