St. Mary's has two burial grounds, and old and a new, and both are Union. The following is a quote from Yoder's history of 1912:
"It is a matter of regret that we can not tell of the beginning of the old cemetery. The oldest headstone that can be read is that of Nicklas Deal, who was one of the first officers of the old log church in the hollow. Not a few stones are there that cannot be read. There are stones without inscription. And doubtless there are early graves that were never marked. In those days the people knew nothing about cemetery plots. A modern cemetery then would have been considered as a shameful, extravagant, waste of land. All were buried in consecutive order without regard of family ties. The old cemetery consist of more than an acre of ground. In course of time it was filled up with the mortal remains of friends and loved ones. The church authorities were obliged to secure a new burial ground.
A special joint meeting of the two congregations was called for April 26, 1879, to take into consideration the enlargement of the burial ground. It was decided by a unanimous rising vote at a joint congregational meeting to use as burial place or cemetery, the land than belonging to the joint congregations on the north-west side of the church adjoining the lands of Wm. J. Feeser and J. Henry Knipple. The following committee was appointed to determine upon the best location: Edward Z. Matthias, Cyrus Feeser, James E. Dodrer, Josiah Lawyer, J. Wm. Earhart. In August said committee reported that the best location for a new cemetery was three and a half acres, more or less, lying on the north-west side of the church building and joining the land of J. Henry Knipple and Wm. J. Feeser, with an entrance opposite the church near the lower side of the sexton house. It was then decided that said committee should continue and be authorized to survey, locate and divide the aforesaid piece of land into lots and passage ways, as would, in their judgement, best adapt it for use as a burial gound to remove all obstructions and build a suitable fence for enclosing said ground.
On March 24, 1880, the following resolutions were passed:
Resolved: That the price of cemetery lots be hereafter fixed at five dollars, per lot of 10x16 feet.
Resolved: That the lots in the north-west corner of the cemetery bounded by the main avenues on the East and South, be kept for the purpose of a free burial ground, with the right reserved to sell any of said lots to persons who may hereafter wish to purchase.
June 8, 1895, it was decided to dispose of the old union sexton and school house buildings at pubic sale as said building stood on the cemetery ground.
In 1907 it was decided by the joint officers to have removed the old picket fences of both the old and new cemeteries and have it replaced by a thornless hedge also to have the old cemetery completely renovated, to have the tomb stones lined up, and the thorns, shrubberies and all obstructions removed, and have the cemetery sodded with lawn grass."