Ottawa is a town in Waukesha County, Wisconsin, United States.

The town is named after the Ottawa, a Native American tribe.

16.2% of all households were made up of individuals, and 9.2% had someone living alone who was 65 years of age or older.

The tornado was rated EF1 on the Enhanced Fujita scale, with winds estimated at 100 mph.

Damage to property was limited, the most severe being a shed's roof being torn off and thrown a quarter-mile away.