County Offices

Official Address:

Ontonagon County Courthouse
725 Greenland Road
Ontonagon, MI 49953

Courthouse hours:

8:30 a.m. to 4:30 p.m.

County Clerk, Register of Deeds, Friend of the Court & Treasurer offices are open all day.
All other offices are closed for lunch from 12:00 noon to 1:00 p.m.

County Holidays

New Year’s Day
Martin Luther King Day
President’s Day
Good Friday
Memorial Day
Juneteenth
Independence Day
Labor Day
Columbus Day
Veterans Day
Thanksgiving Day
Friday after Thanksgiving
Christmas Eve Day
Christmas Day
New Year’s Eve Day