| Locality | Post Code |
|---|---|
| Ayr, Waterloo | N0B |
| Baden, Waterloo | N3A |
| Bloomingdale, Waterloo | N0B 1K0 |
| Branchton, Waterloo | N0B 1L0 |
| Breslau, Waterloo | N0B 1M0 |
| Cambridge, Waterloo | N1P, N1R, N1S, N1T, N3C, … |
| Conestogo, Waterloo | N0B 1N0 |
| Elmira, Waterloo | N3B |
| Floradale, Waterloo | N0B 1V0 |
| Guelph-Eramosa, Waterloo | N0B 2K0 |
| Hawkesville, Waterloo | N0B 0B3, N0B 1X0 |
| Heidelberg, Waterloo | N0B 2M1 |
| Kitchener, Waterloo | N0B, N2A, N2B, N2C, N2E, … |
| Linwood, Waterloo | N0B |
| Maryhill, Waterloo | N0B 2B0 |
| New Dundee, Waterloo | N0B |
| New Hamburg, Waterloo | N3A |
| Petersburg, Waterloo | N0B |
| Saint Agatha, Waterloo | N0B 2L0 |
| Saint Clements, Waterloo | N0B |
| Saint Jacobs, Waterloo | N0B |
| Wallenstein, Waterloo | N0B 2S0 |
| Waterloo, Waterloo | N2J, N2K, N2L, N2T, N2V |
| Wellesley, Waterloo | N0B |
| West Montrose, Waterloo | N0B 2V0 |