| Enumerated Area | pre1851 | 1851 | 1861 | 1871 | 1881 | 1891 | 1901 | 1911 |
| Yarker Village | LnA | |||||||
| Yarmouth Twp | ELG | MS | ELG | ELG | ELG | ELG | ELG | ELG |
| Yellow | ALG | |||||||
| Yelverton Village | DUR | |||||||
| Yonge & Escott Front Twp | LEE | |||||||
| Yonge & Escott Rear Twp | LEE | LEE | ||||||
| Yonge Front Twp | LEE | LEE | LEE | LEE | ||||
| Yonge Rear Twp | LEE | LEE | LEE | |||||
| Yonge Twp | LEE | LEE | ||||||
| York Twp | MS | YOR | YOR | YOR | ||||
| York Twp East | YOR | YOR | YOR | YOR | ||||
| York Twp West | YOR | YOR | YOR | YOR | ||||
| York Village | HLD | |||||||
| Yorkville Village | YOR | YOR | YOR | YOR |