Allen University is a private historically black university in Columbia, South Carolina, United States. It has more than 600 students and still serves a predominantly Black constituency. The campus is listed on the National Register of Historic Places as Allen University Historic District.

Allen University was founded in Cokesbury in 1870 as Payne Institute by ministers of the African Methodist Episcopal Church, including John M. Brown. Its initial mission was to provide education to freedmen, former African American slaves and their children.

In 1880, it was moved to Columbia and renamed Allen University in honor of Richard Allen, founder of the African Methodist Episcopal Church. The university remains connected to the denomination, which is related to other Methodist churches. As one of two black colleges located in Columbia, Allen has a very strong presence in the African-American community. Allen University initially focused on training ministers and teachers, who were considered critical to the progress of African Americans. Over the years, it has enlarged its scope to produce graduates in other academic areas.

In 1885, Joseph W. Morris became president of the university. By 1898, the university reported having a total of 9 faculty, 304 students, and 208 graduates.

The university is accredited by the Southern Association of Colleges and Schools to offer Bachelor of Arts and Bachelor of Science degrees. These degree programs are organized into five divisions:

In 2010, Washington Monthly reported in its annual College Guide edition that the school had a six percent graduation rate. In 2018, Allen University launched its first graduate program, the Dickerson-Green Theological Seminary. Under the seminary's founding dean, Jamal-Dominique Hopkins, Dickerson-Green Theological Seminary gained member status with the Association of Theological Schools in the United States and Canada to offer the Master of Arts in Religion and Master of Divinity degrees.

Buildings such as Arnett Hall, the Chappelle Administration Building, Coppin Hall, the Joseph Simon Flippen Library, and the Canteen Building are included in what is designated as the Allen University Historic District, listed in 1975 on the National Register of Historic Places.

In addition to its National Register of Historic Places status, Allen University Historic District falls within the boundaries of Waverly Protection Area, a Preservation District within the City of Columbia Urban Design and Historic Preservation District system. This Preservation District is an expansion of Waverly Historic District.