This dataset contains information on mills in the province of Friesland, and includes data on the location, function, building technique, owners and millers. The research concentrates on the period of about 1400 until the present day. The geographical area is Friesland, according to the current borders. For this research sources have been used from regional archives, cadastral archives, the archives of the Stichting Molendocumentatie in Amsterdam, and general and regional publications on mills, periodicals and newspapers. The dataset is not yet completed. The deposited file is part of a relational database which can be consulted after contacting the depositor.