The municipality includes the island of Orø, and covers an area of 583 km², and has a total population of 74,129 (2024).

The main town and the site of its municipal council is the city of Holbæk.

Holbæk's municipal council consists of 31 members, elected every four years.

The ten largest urban areas in the municipality are: The number of inhabitants on 1 January:

This article about a location in the Region Zealand (Denmark) is a stub.