Watertown is a city in Dodge

Dodge County, Wisconsin

Dodge County is a county located in the U.S. state of Wisconsin. As of 2010, the population was 88,759. Its county seat is Juneau.-Geography:According to the U.S...

 and Jefferson

Jefferson County, Wisconsin

Jefferson County is a county located in the U.S. state of Wisconsin. As of 2000, the population was 74,021. Its county seat is Jefferson.-Geography:According to the U.S...

 counties in the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Wisconsin

Wisconsin

Wisconsin is a U.S. state located in the north-central United States and is part of the Midwest. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michigan to the northeast, and Lake Superior to the north. Wisconsin's capital is...

. Most of the city's population is in Jefferson County. Division Street, several blocks north of downtown, marks the county line. The population of Watertown was 21,598 at the 2000 census. Its 2007 estimated population was 23,301.

Watertown is the largest city in the Watertown-Fort Atkinson micropolitan area, which also includes Johnson Creek and Jefferson

Jefferson, Wisconsin

Jefferson is a city in Jefferson County, Wisconsin, and is its county seat. It is located at the confluence of the Rock and Crawfish Rivers. The population was 7,338 at the 2000 census. The city is located partially within the Town of Jefferson.-History:...

.
Watertown was first settled by Timothy Johnson, who built a cabin on the west side of the Rock River in 1836.