| Locality | Postal Code |
|---|---|
| Addison, Leeds and Grenville | K0E 1A0 |
| Athens, Leeds and Grenville | K0E |
| Augusta, Leeds and Grenville | K0E 1T1 |
| Brockville, Leeds and Grenville | K6V |
| Cardinal, Leeds and Grenville | K0E |
| Delta, Leeds and Grenville | K0E |
| Elgin, Leeds and Grenville | K0G |
| Elizabethtown, Leeds and Grenville | K6T, K6V |
| Frankville, Leeds and Grenville | K0E 1H0 |
| Gananoque, Leeds and Grenville | K7G |
| Jasper, Leeds and Grenville | K0G 1G0 |
| Johnstown, Leeds and Grenville | K0E 1T1 |
| Kemptville, Leeds and Grenville | K0G |
| Lansdowne, Leeds and Grenville | K0E |
| Lombardy, Leeds and Grenville | K0G 1L0 |
| Lyn, Leeds and Grenville | K0E, K6T |
| Lyndhurst, Leeds and Grenville | K0E |
| Maitland, Leeds and Grenville | K0E 1P0, K0E 0A4 |
| Mallorytown, Leeds and Grenville | K0E |
| Merrickville, Leeds and Grenville | K0G |
| Newboro, Leeds and Grenville | K0G 1P0 |
| North Augusta, Leeds and Grenville | K0G |
| Oxford Mills, Leeds and Grenville | K0G 1S0 |
| Oxford Station, Leeds and Grenville | K0G 1T0 |
| Portland, Leeds and Grenville | K0G |
| Prescott, Leeds and Grenville | K0E |