| Pre 1850 | In Home District (Ontario had districts before there were provinces) |
| 1851 | York County formed |
| January 1, 1850 | Township of York is incorporated |
| 1881 | Weston separates from York Township and becomes incorporated as Village of Weston, effectively reducing the size of York Township |
| January 1, 1882 | First Village council meeting |
| 1915 | Incorporated as a town |
| April 15, 1953 | Township of York and Weston become two of thirteen municipalities in the new Municipality of Metropolitan (Metro) Toronto. Weston still maintains its own departments and control for the most part. |
| January 1, 1967 | Township of York and Weston amalgamate and are incorporated as the Borough of York. Weston ceases to exist as a separate entity. |
| June 10, 1983 | Borough of York is incorporated as a city |
| January 1, 1998 | Borough of York ceases to be an individual city and becomes part of the amalgamated City of Toronto |
Click here to see an illustration of the above history.
Click here to see some old maps of Weston.
It is also important to know if and when the street name changed:
Sometimes the house numbers changed, even though the street name did not. Eventually, the farther back you go there are no house numbers, only lot and plan numbers.
Click here to see a modern day map of Weston.