The Mount Rushmore National Memorial is a national memorial centered on a colossal sculpture carved into the granite face of Mount Rushmore (Lakota: Tȟuŋkášila Šákpe, or Six Grandfathers) in the Black Hills near Keystone, South Dakota, United States. The sculptor, Gutzon Borglum, named it the Shrine of Democracy, and oversaw the execution from 1927 to 1941 with the help of his son, Lincoln Borglum. The sculpture features 60-foot-tall (18 m) depictions of the heads of four United States presidents: George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln, respectively chosen to represent the nation's foundation, expansion, development, and preservation. Mount Rushmore attracts more than two million visitors annually to the memorial park which covers 1,278 acres (2.00 sq mi; 517 hectares). The mountain's elevation is 5,725 feet (1,745 m) above sea level.

Borglum chose Mount Rushmore in part because it faces southeast for maximum sun exposure. The carving was the idea of Doane Robinson, South Dakota's state historian. Robinson originally wanted the sculpture to feature American West heroes, such as Lewis and Clark, their expedition guide Sacagawea, Oglala Lakota chief Red Cloud, Buffalo Bill Cody, and Oglala Lakota chief Crazy Horse. Borglum chose the four presidents instead.

Peter Norbeck, U.S. senator from South Dakota, sponsored the project and secured federal funding. Construction began in 1927 and the presidents' faces were completed between 1934 and 1939. After Gutzon Borglum died in March 1941, his son Lincoln took over as leader of the construction project. Each president was originally to be depicted from head to waist, but lack of funding forced construction to end on October 31, 1941, and only Washington's sculpture includes any detail below chin level.

The sculpture at Mount Rushmore was built on land that was taken from the Sioux Nation in the 1870s. The Sioux continue to demand return of the land, and in 1980 the US Supreme Court ruled in United States v. Sioux Nation of Indians that the taking of the Black Hills required just compensation, and awarded the tribe $102 million. The Sioux have refused the money, and demand the return of the land. This conflict continues, leading some critics of the monument to refer to it as a "Shrine of Hypocrisy".

Mount Rushmore and the surrounding Black Hills (Pahá Sápa) are considered sacred by Plains Indians such as the Arapaho, Cheyenne, and Lakota Sioux, who used the area for centuries as a place to pray and gather food, building materials, and medicine. The Lakota called the mountain "Six Grandfathers" (Tȟuŋkášila Šákpe), symbolizing ancestral deities personified as the six directions: north, south, east, west, above (sky), and below (earth). In the latter half of the 19th century, expansion by the United States into the Black Hills led to the Sioux Wars. In the 1868 Treaty of Fort Laramie, the U.S. government granted exclusive use of all of the Black Hills, including Six Grandfathers, to the Sioux in perpetuity.

Six Grandfathers was a significant part of the spiritual journey taken in the early 1870s by Lakota leader Black Elk (Heȟáka Sápa, also known as "The Sixth Grandfather") that culminated at the nearby Black Elk Peak (Hiŋháŋ Káǧa, "Making of Owls"). U.S. general George Armstrong Custer summited Black Elk Peak a few years later in 1874 during the Black Hills Expedition, which triggered the Black Hills Gold Rush and Great Sioux War of 1876. In 1877, the U.S. broke the Treaty of Fort Laramie and asserted control over the area, leading to an influx of settlers and prospectors.

Among those prospectors was New York mining promoter James Wilson, who organized the Harney Peak Tin Company, and hired New York attorney Charles E. Rushmore to visit the Black Hills and confirm the company's land claims. Rushmore visited the area on three or four trips over the span of 1884 and 1885. During one of these visits, Rushmore was traveling near the base of the peak and, impressed with it, asked his guide, Bill Challis, the mountain's name; Challis replied that the mountain did not have a name, but that it would henceforth be named after Rushmore. The name "Mount Rushmore" continued to be used locally, and was officially recognized by the United States Board of Geographic Names in June 1930.

By the 1920s, South Dakota had become a U.S. state, and was a popular destination for road trippers visiting the Black Hills National Forest, Wind Cave National Park, and Needles Highway. In 1923, the Secretary of the South Dakota State Historical Society, Doane Robinson, who would come to be known as the "Father of Mount Rushmore", learned about the "Shrine to the Confederacy", a project to carve the likenesses of Confederate generals into the side of Stone Mountain, Georgia, that had been underway since 1915. Seeking to boost tourism to South Dakota, Robinson began promoting the idea of a similar monument in the Black Hills. Robinson initially approached sculptor Lorado Taft, but Taft was ill at the time and uninterested in Robinson's project. Robinson next sought the help of then-U.S. Senator Peter Norbeck, who had established Custer State Park when he was Governor in 1919. Norbeck cautiously supported Robinson's plan, and Robinson began campaigning for it publicly. The Sioux Falls Argus Leader was also an early proponent of Robinson's plan.