| Code | Name | Region |
|---|---|---|
| CAIOC | Ioco | BC |
| CAION | Iona | NS |
| CAIQL | Iqaluit | NU |
| CAHUN | Huntsville | ON |
| CAHUP | Huron Park | ON |
| CAHYE | Hythe | AB |
| CAIBV | Iberville | QC |
| CAIGL | Igloolik | NU |
| CAZUC | Ignace | ON |
| CAIDO | Ilderton | ON |
| CAIXC | Ile Aux Coudres | QC |
| CABZD | Ile Bizard | QC |
| CAIDC | Ile Des Chenes | MB |
| CAIPE | Ile Perrot | QC |
| CAIGT | Ile-du-grand-calumet | QC |
| CABRV | Iles De Boucherville | QC |
| CAYGR | Iles De La Madeleine | QC |
| CAILF | Ilford | MB |
| CASIM | Imperial | SK |
| CAIAM | Indian Arm | BC |
| CAIHR | Indian Harbour | NL |
| CAIHD | Indian Head | SK |
| CAIGS | Ingersoll | ON |
| CAYHI | Holman | NT |
| CAHST | Holstein | ON |
| CAHOD | Holyrood | NL |
| CAHYO | Holyrood | ON |
| CAHNH | Honey Harbour | ON |
| CAHOF | Honfleur | QC |
| CAYHE | Hope | BC |
| CAHOP | Hopedale | NL |
| CAHOR | Hornby | ON |
| CAYHN | Hornepayne | ON |
| CAHRF | Horsefly | BC |
| CAHOU | Houston | BC |
| CAHWS | Howe Sound | BC |
| CAHUD | Hudson | QC |
| CAYHB | Hudson Bay | SK |
| CAYNH | Hudson Hope | BC |
| CAHUL | Hull | QC |
| CAHMO | Humboldt | SK |
| CAHUR | Hunter River | PE |
| CAHDN | Huntingdon | QC |
| CAHEP | Heritage Pointe | AB |
| CAHBY | Heron Bay | ON |
| CAHLI | Herschel Island | YT |
| CAHIB | Hibernia | NS |
| CAHKS | Hickson | ON |
| CAHBL | High Bluff | MB |
| CAYOJ | High Level | AB |