Walnut Grove is an unincorporated community in Collin County, Texas, United States.
[2][1] The community is located along Wilson Creeek and Farm to Market Road 2478 (approximately 8-mile [13 km] northwest of McKinney) and is now mostly within the city limits of Propser.
Soon a Presbyterian church was established, as well as a cemetery by 1863 (the year on the earliest marked graves).
[3] In 1976, the Walnut Grove Presbyterian Church was designated as a Texas Historic Landmark.
Today the congregation worships in this frame country church, built in 1886 and remodeled in 1968.