The former municipality covered an area of 72 km2, and had a total population of 7,856 (2005).

She was the first foreign national becoming mayor in a Danish municipality.

[3] The town of Hvalsø (officially called Kirke Hvalsø) is located almost equidistant from the larger towns of Roskilde to the northeast, Ringsted to the south, and Holbæk to the northwest.

[1] The large, state-owned and managed, wooded area, Bidstrup Woods (Bidstrup Skovene), is located south of the town, and offers many recreational possibilities.

Hvalsø is served by Hvalsø railway station on the Northwest Line and has regional train connections to Copenhagen, Roskilde, Holbæk and Kalundborg.