Sweden District List

There are a number of ways to determine to which härad (district) a parish belonged. Here are some of the ways:

The Family Search Wiki Parish List. See Parish List
The FamilySearch Catalog at www.familysearch.org (Do a place search for name of your parish. Get the Church Records for that parish. In the notes for the parish will be the härad (judicial district).
Lista över svenska härader (List of Swedish districts) See http://sv.wikipedia.org/wiki/Lista_%C3%B6ver_svenska_h%C3%A4rader
A Swedish gazetteer like Rosenberg's Statistiskt-Geografiskt Handlexikon. See Geografiskt-Statistiskt Handlexikon Öfver Sverige

For more information about the districts in Sweden see Districts