St. Mary Cathedral in Lansing, Michigan

North: Intersection of Martin Luther King Jr. Boulevard and the Grand River; the Grand River southwest to Grand River Avenue; Grand River Avenue east to the Detroit-Lansing Railroad Tracks.

East: The Detroit-Lansing Railroad Tracks south to the Grand River.

South: The Grand River west to Martin Luther King Jr. Boulevard.

West: Martin Luther King Jr. Boulevard north to the Grand River to the point of the beginning.

All Latin Rite Catholics living within the above described territory are considered members of St. Mary Cathedral, and as such, are subject to the spiritual jurisdiction of the Reverend Pastor of that Parish.