The Lutheran Theological Seminary at Gettysburg was a seminary of the Evangelical Lutheran Church in America (ELCA) in Gettysburg, Pennsylvania. It was one of seven ELCA seminaries, one of the three seminaries in the Eastern Cluster of Lutheran Seminaries, and a member institution of the Washington Theological Consortium. It was founded in 1826 under prominent but controversial theologian and professor Samuel Simon Schmucker (1799-1873) for the recently organized General Synod of the Evangelical Lutheran Church in the United States. The seminary was the oldest continuing Lutheran seminary in the United States until it was merged on July 1, 2017, after 189 years of operation, with the nearby and former rival Lutheran Theological Seminary at Philadelphia to form the United Lutheran Seminary. The new institution continues to use both campuses.

Gettysburg is a borough in and the county seat of Adams County, Pennsylvania, United States. As of the 2020 census, the borough had a population of 7,106 people.