The Sweet Auburn Historic District is a historic African-American neighborhood along and surrounding Auburn Avenue, east of downtown Atlanta, Georgia, United States. The name Sweet Auburn was coined by John Wesley Dobbs, referring to the "richest Negro street in the world," one of the largest concentrations of African-American businesses in the United States.

A National Historic Landmark District was designated in 1976, covering 19 acres (7.7 ha) of the neighborhood, significant for its history and development as a segregated area under the state's Jim Crow laws. Sweet Auburn was also added to the National Register of Historic Places the same year.

Sweet Auburn is one of 242 officially recognized neighborhoods of Atlanta. It is bounded by:

The first settlement here was on land formerly occupied by Union troops and was called Shermantown for many years. It developed quickly being near the Georgia Railroad and in 1879 was at the endpoint of a newly graded road called simply Boulevard, which led from the railroad to North Avenue near Ponce de Leon Avenue and Angier Springs.

The rise of Auburn Avenue as "the" black business district in Atlanta was to a great extent an outcome of the 1906 Atlanta Race Riot. Prior to this time black businesses operated largely in downtown Atlanta — a business district integrated as far as business ownership was concerned. But competition between working-class whites and blacks for jobs and housing gave rise to fears and tensions. In 1906, print media fueled these tensions with hearsay about alleged sexual assaults on white women by black men, triggering the riot, which left at least 27 people dead (25 of them black) and over 70 injured.

Black businesses started to move from previously integrated business district downtown to the relative safety of the area around the Atlanta University Center west of downtown, and to Auburn Avenue in the Fourth Ward east of downtown. "Sweet" Auburn Avenue became home to Alonzo Herndon's Atlanta Mutual, the city's first black-owned life insurance company, and to a celebrated concentration of black businesses, newspapers, churches, and nightclubs. In 1956, Fortune magazine called Sweet Auburn "the richest Negro street in the world", a phrase originally coined by civil rights leader John Wesley Dobbs from the poem The Deserted Village by Oliver Goldsmith. Sweet Auburn and Atlanta's black colleges formed the nexus of a prosperous black middle class and upper class which arose despite enormous social and legal obstacles.

Sweet Auburn was designated a National Historic Landmark in 1976. However, like so many other inner-city neighborhoods, Sweet Auburn fell victim to lack of investment, heavy, widespread crime, homelessness, and abandonment, compounded by construction of the Downtown Connector freeway that split it in two. In 1992 the National Trust for Historic Preservation recognized that it was one of America's 11 Most Endangered Historic Places and, in 2005, the Georgia Trust for Historic Preservation included the area in its 2006 list of Places in Peril. The Historic District Development Corporation (HDDC) was formed to turn the trend around, starting with houses surrounding the birth home of Dr. Martin Luther King Jr., and working outward. In 2014, the city of Atlanta completed the installation of the Atlanta Streetcar, a line that creates a loop connecting the Martin Luther King Jr. National Historical Park to downtown and the tourist attractions of Centennial Olympic Park. The streetcar travels east along Edgewood Avenue and west along Auburn Avenue.

Several churches located along the avenue, such as Big Bethel AME and First Congregational, helped build and maintain the heritage of the street. Our Lady of Lourdes Catholic Church, located just off the avenue, was also a significant force as the first Black Catholic parish in the city.