The City of St. Thomas Ontario

The city of St. Thomas, located in Southwestern Ontario, is the 48th largest city in Ontario, by the 2011 census data.


The map in Figure 1 shows the geographical location of St. Thomas (drag the map to the right with the left mouse button to see St.Thomas). Street names are found by zooming in using the “+” and “-” buttons in the upper left of the map. In the upper right are buttons to switch views between map and satellite imagery.

Figure 1. Interactive location map.

Source: Mapquest.

Underneath the map on the left is a button to open another window with a larger map image in it. This image has easier-to-use controls in the upper right corner.


According to City Data, some demographic characteristics of St. Thomas are:

  • Population: 37,905 in 2011. The population growth rate of 5.0% is below the 2006 – 2011 provincial average of 5.7%.
  • Labour and wages: the participation and employment rates are slightly below provincial averages as is the unemployment rate.
  • Language used: English 99%; other 1%.
  • Education: above the provincial averages in all categories except university.
  • Citizenship and immigration: 1.6% aboriginal and 3.7% visible minorities with Southeast Asia dominant at 24% Arab followed by 16% Black.

Source: St. Thomas – City, Ontario, Canada.

Climate and Soil

St. Thomas is in plant hardiness zone either 6a (see interactive map) or 6b (see Plant Hardiness Zone by Municipality, interactive list). A large scale map of the zones is shown in Figure 2.

Figure 2. Plant hardiness zones of Southern Ontario (click to enlarge).

Source: GEOSCAN.

The table St. Thomas Average Monthly Climate Data & Extremes, has values for many climate parameters (taken from Ontario, Canada Climate Stats). Selections are:

  • Annual rainfall: 89.7 cm.
  • Annual snowfall: 12.0 cm.
  • Annual precipitation: 101.7 cm.

A survey of Ontario soils has been made over the years. These are collected by county in the table Historical Soil Maps and Reports at the bottom of page Use of Soil and Canada Land Inventory (CLI) Information for Agricultural Land Use Planning in Ontario.


St. Thomas Energy Inc. is the licensed energy distributor for St. Thomas, Ontario. Regulated by the Ontario Energy Board, it is owned by the Ascent Group of Companies, which is wholly owned by the City of St. Thomas.


Union Gas provides gas services within the municipality. Head office is in Chatham with district offices in Windsor, Chatham, London, Sarnia, Waterloo, and Brantford in Southwestern Ontario.


The City of St. Thomas owns and operates the City of St. Thomas Water Distribution System. It purchases its treated drinking water from the Joint Boards of Management (Lake Huron and Elgin Area Primary Water Supply Systems (LHEWSS). It receives all of its treated water from Lake Erie.

LHEWSS chlorinates water before distribution. Neither agency uses chloramines  (chlorine plus ammonia) (read: Water Quality).

For a more detailed description of the treatment of water and the regional distribution network, read our post: Lake Huron and Elgin Water Supply Systems (LHEWSS).

The Summary and Annual Reports required by the Ontario Ministry of the Environment will be available to the public without charge, beginning March 1st of the following year. The current reports are:

Medical Facilities



Real Estate

A selection of the major real estate firms:

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