Lyon County Sheriff Home | Administration | Patrol Division | Investigation | Correctional Detention | Emergency Management | Links Administration 611 West Main Street Marshall, MN 56258 Phone: 507-537-7666 Fax: 507-537-7428 Sheriff Joel Dahl JoelDahl@co.lyon.mn.us Chief Deputy Mark Mather MarkMather@co.lyon.mn.us Sergeant Todd Roelfsema ToddRoelfsema@co.lyon.mn.us