St. Mary Parish in Williamston, Michigan

North: Intersection of Shoeman Road and the northern boundary of Ingham County; the northern boundary of Ingham County east to Shaftsburg Road; Shaftsburg Road south to Haslett Road; Haslett Road east as extended to the eastern boundary of Ingham County.

East: The eastern boundary of Ingham County south to Allen Road; Allen Road west to Webberville Road; Webberville Road which becomes the western boundary of Sections 2, 11, 14, 23, 26 and 35 in Leroy Township becoming the western boundary of Sections 2, 11 and 14 in White Oak Township south to Dansville Road.

South: Dansville Road west to M 52; M 52 south to M 36; M 36 west to the western boundary of Ingham Township.

West: The western boundary of Ingham Township from M 36 north becoming the western boundary of Wheatfield Township north to Linn Road; Linn Road east to Burkley Road; Burkley Road north as extended to Shoeman Road to the point of the beginning.

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