Tustin is a census-designated place in the Town of Bloomfield, Waushara County, Wisconsin, United States. As of the 2020 census, Tustin had a population of 120. Tustin is located on the northern shore of Lake Poygan. Notable people Robert H. Boyson, Wisconsin State Assemblyman, was born in Tustin.'Wisconsin Blue Book 1944,' Biographical Sketch of Robert H. Boyson, pg. 48
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