Union State Line Lutheran Church
- ELCA congregation, with Sunday school and vacation Bible school.
- http://www.elca.org/ScriptLib/OS/Congregations/cdsDetail.asp?congrno=11008

Petersburg Area Map
- Shows where Petersburg is in relation to Jackson, Fairmont, and the Iowa state line. Interactive.
- http://maps.yahoo.com/py/maps.py?Pyt=Tmap&city=Petersburg&state=MN&slt=43.5303&sln=-94.9186&mlt=43.5302&mln=-94.9185&mag=5&cs=5&map.x=195&map.y=46