East Troy, WI. Online Offers. East Troy is a village in Walworth County, Wisconsin, United States. The population was 3,564 at the 2000 census. The village is located southeast of the Town of East Troy. A small portion extends into the adjacent Town of Troy. The village is surrounded by lakes, Booth Lake and Lake Beulah being the biggest and most popular. East Troy is located at 42°48′N 88°24′W / 42.8°N 88.4°W / 42.8; -88.4 (42.7868, -88.4036).