| Ontario | |
|---|---|
| County Number | 52 |
| Postal abbr. | ON |
| Capital | Toronto |
| Nickname | Yours to Discover, The Heartland Province |
| ISO | CA-ON |
| FIPS | CA08 |
| Name | County | Postal Code |
|---|---|---|
| Egbert | 3543 | L0L |
| Val Caron | 3553 | P3N |
| Glenburnie | 3510 | K0H |
| Fordwich | 3540 | N0G |
| Blezard Valley | 3553 | P0M |
| Sandy Lake | 3560 | P0V |
| Trenton | 3512 | K8V |
| Cedar Springs | 3536 | N0P |
| Little Britain | 3516 | K0M |
| Grassy Narrows | 3560 | P0X |
| Name | State |
|---|---|
| Hastings | Ontario |
| Niagara | Ontario |
| Muskoka | Ontario |
| Brant | Ontario |
| Waterloo | Ontario |
| Cochrane | Ontario |
| Prince Edward | Ontario |
| Grey | Ontario |
| Northumberland | Ontario |
| Durham | Ontario |
| Lennox and Addington | Ontario |
| Oxford | Ontario |
| Lanark | Ontario |
| Haliburton | Ontario |
| Haldimand-Norfolk | Ontario |
| Ottawa | Ontario |
| Dufferin | Ontario |
| Chatham-Kent | Ontario |
| Huron | Ontario |
| Parry Sound | Ontario |