| Code | Name | Region |
|---|---|---|
| CAZNR | Zehner | SK |
| CAZPK | Zenon Park | SK |
| CAZPY | Zephyr | ON |
| CAZUR | Zurich | ON |
| CAWDA | Woodham | ON |
| CAWDL | Woodlands | MB |
| CAOOW | Woodside | NB |
| CAWDS | Woodstock | NB |
| CAWSK | Woodstock | ON |
| CAWRG | Worthington | ON |
| CAWTM | Wrentham | AB |
| CAYWY | Wrigley | NT |
| CAWNN | Wunnummin Lake | ON |
| CAWYN | Wynyard | SK |
| CAWYO | Wyoming | ON |
| CAZYE | Yamachiche | QC |
| CAYRH | Yarmouth | NS |
| CAYRW | Yarrow | BC |
| CAYZF | Yellowknife | NT |
| CAYRK | York | ON |
| CAYOK | York | PE |
| CAZAC | York Landing | MB |
| CAYQV | Yorkton | SK |
| CAZEB | Zeballos | BC |
| CAWSR | Windsor | QC |
| CAWNF | Winfield | AB |
| CAWFD | Winfield | BC |
| CAWIG | Wingham | ON |
| CAYWN | Winisk | ON |
| CAWNK | Winkler | MB |
| CAWNP | Winnipeg | MB |
| CAYWG | Winnipeg Apt | MB |
| CAWIN | Winona | ON |
| CAWSL | Winsloe | PE |
| CAWBN | Winterburn | AB |
| CAWB8 | Witless Bay | NL |
| CAWFI | Wolfe Island | ON |
| CAWOV | Wolfville | NS |
| CAZWL | Wollaston Lake | SK |
| CAWSY | Wolseley | SK |
| CAWOI | Wood Island | PE |
| CAWOP | Wood Islands | PE |
| CAWDB | Woodbridge | ON |
| CAWOO | Woodfibre | BC |
| CAWIC | Wickham West | QC |
| CAWCM | Wicomico | MB |
| CAWIX | Wilcox | SK |
| CAWWO | Wildwood | AB |
| CALLV | Wileville | NS |
| CAWKP | Wilkesport | ON |