The Lovejoy and Merrill-Nowlan Houses are two large, adjacent houses built in the 1800s in the Courthouse Hill Historic District in Janesville, Wisconsin. The Lovejoy house is in a rather eclectic Queen Anne style; Merrill-Nowlan is Georgian Revival. They were separate single-family homes with independent histories until both were owned by the YWCA in the 1970s. In 1980, they were added to the National Register of Historic Places.

Janesville is the most populous city and the county seat of Rock County, Wisconsin, United States. It is a principal municipality of the Janesville, Wisconsin, Metropolitan Statistical Area and is included in the Madison–Janesville–Beloit, WI Combined Statistical Area. As of the 2020 census, the city had a population of 65,615, making it the tenth-most populous city in Wisconsin.