The first documented burial in Cedar Grove Cemetery was that of Phebe A. Martin in 1875, three years after the town of Trinity was laid out on the George W. Wilson survey. Nearly 100 graves date to the 19th century, many of them from an 1897-98 diphtheria epidemic. In 1914, a cemetery association was chartered to manage and maintain the public burial ground. Those buried there include founders of Trinity, professional and business leaders, and local citizens who served in the United States Armed Forces.