The Post Office opened March 1, 1913. The first postmaster was H E Anderson, who held the position from 1913 until 1916. He named the town after the port of Aden in Yemen. The locality was officially recognized and cataloged by the Geographic Board of Canada in the early 20th century as homesteaders moved into the short-grass prairie regions of southern Alberta following the opening of the West. From its earliest days, Aden's primary strategic significance has been its location on the Canada–United States border. It serves as a vital international port of entry linking Alberta Highway 880 with Montana Secondary Highway 409 (connecting to Whitlash, Montana, across the line). Historically, this remote crossing acted as a quiet conduit for regional ranchers, travelers, and goods moving between southern Alberta and northern Montana.3. The history of Aden and its surrounding vicinity is heavily rooted in cattle ranching and dryland farming. Due to the semi-arid, short-grass prairie climate of the region (often associated with what was historically mapped as Palliser's Triangle), the area could not support intensive crop farming without irrigation. Instead, the rolling hills and deep coulees became home to resilient generational ranching families. Operations like the historic local ranches played a major role in regional associations that managed grazing leases and livestock standards in southern Alberta throughout the 20th century.