|Population Density||1,067.3/km2 (2,764/sq mi)|
|City Area||35.52 km2 (13.71 sq mi)|
|Elevation||209.10 m (686.02 ft)|
|Postal code||N5P, N5R|
|Area code(s)||519 and 226|
St. Thomas (2011 population 37,905) is a city in Southwestern Ontario, Canada. It gained its city charter on March 4, 1881. The city is also the seat for Elgin County, although it is independent of the county. It is part of the London census metropolitan area.
In the late 19th century and early 20th century several railways were constructed through the city, and St. Thomas became an important railway junction. A total of 26 railways have passed through the city since the first railway was completed in 1856. In the 1950s and 1960s, with the decline of the railway as a mode of transportation, other industry began to locate in the city, principally primary and secondary automotive manufacturing.