Union Grove Township is a rural, non-functioning county subdivision established in 1868 in Iredell County, North Carolina, United States. Two towns have existed in Union Grove township: 1) the unincorporated community Union Grove, established in 1857 and 2) the former town of Williamsburg established in 1812. The Union Grove Post Office was established in 1857. In 2019, within the unincorporated town of Union Grove is the Union Grove Milling Company, Union Grove School, Union Grove Volunteer Fire House, and two Methodist churches. In the later half of the 20th century, Union Grove was famous for the Fiddler's Convention which was held in Union Grove from the 1920s to 1970s. The Fiddler's Convention was originally established to benefit the Union Grove school.

Iredell County is a county located in the U.S. state of North Carolina. As of the 2020 census, the population was 186,693. Its county seat is Statesville, and its largest community is Mooresville. The county was formed in 1788, subtracted from Rowan County. It is named for James Iredell, one of the first justices of the Supreme Court. Iredell County is included in the Charlotte-Concord-Gastonia, NC-SC Metropolitan Statistical Area, as defined by the Office of Management and Budget, with data from the U.S. Census Bureau.