Tierp is a municipality in east central Sweden, in the county of Uppsala. The municipality covers an area of 1543.0 km². Of the total population of 19888, 9980 are male, and 9908 are female. The population density of the community is 13 inhabitants per km².
... of age or older. The average household size is 2.41 and the average family size is 2.88.
In the town the population is spread out with 20.6% under the age of 18, 5.0% ...