Hornum is a town in western Himmerland with a population of 924, located 21 km southeast of Løgstør and 9 km northwest of Aars. The town belongs to the municipality of Vesthimmerland Municipality and is located in the North Denmark Region. Hornum is located in Ulstrup parish. Ulstrup Church, also known as Hornum-Ulstrup Church, is located a little south of the town by the old village of Ulstrup. In the northern part of the town lies Søttrup Frimenighedskirke.