Elgin is a census-designated place (CDP) in Santa Cruz County, Arizona, United States.

[4] The Babocomari is known to harbor a unique species of fish, belonging to the family Characidae.

According to the United States Census Bureau, the CDP has a total area of 5.9 square miles (15.4 km2), all land.

Red River (1948) - This film, starring John Wayne and Montgomery Clift, used Elgin as the site of most of the exterior shots of the cattle drive.

(1955) - The train station sequence in this musical film classic, with Gene Nelson singing and dancing the song "Kansas City" partly atop a moving train, was filmed in Elgin.

3:10 to Yuma (1957) - The railroad scenes in this western, with Glenn Ford and Van Heflin, were filmed in Elgin.

Elgin is the first location in Arizona to engage in commercial scale winemaking.