There are 103 parishes and missions in the Diocese of Grand Rapids.

The diocese is comprised of 11 counties in Western Michigan: Ionia, Kent, Lake, Mason, Mecosta, Montcalm, Muskegon, Newaygo, Oceana, Osceola, and Ottawa. The area covers 6,795 square miles.

The total population of the 11-county area is estimated at 1,283,717 (2000 U.S. Census), Catholic population at 162,670 (2005 Official Catholic Directory).