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Wellington County was named after Arthur Wellesley, the First Duke of Wellington.
1838 - The District of Wellington was set apart as a separate District and contained the counties of Wellington, Waterloo, Grey and parts of Dufferin County.
1852 - The United Counties of Waterloo, Wellington and Grey were formed.
1853 - Wellington separated from Waterloo.
1854 - Wellington County became an individual entity consisting of the Townships and Towns of Amaranth, Arthur, Eramosa, Erin, Guelph, Guelph (Town), Garafraxa, Maryborough, Nichol, Peel, Pilkington, and Puslinch. The first Wellington County Council meeting was held on January 23, 1854.
In subsequent years, other municipalities joined the County:
1879 - The City of Guelph separated and became incorporated as a City and was no longer represented on Wellington County Council. Luther Township was divided into East and West. Orangeville and Garafraxa East joined Dufferin County and were no longer represented on Wellington County Council.
1883 - East Luther Township joined Dufferin County.
Amalgamation in 1999 resulted in the formation of seven new municipalities:
Visit our Museum and Archives for more rich history on Wellington County.