Tucked into the semi-arid landscape of southeastern Alberta, Seven Persons sits roughly 20 kilometres southwest of Medicine Hat along Highway 3, within the boundaries of Cypress County. The hamlet rests at an elevation of 755 metres above sea level and falls under Census Division No. 1. For federal electoral purposes, it is part of the riding of Medicine Hat-Cardston-Warner. The hamlet takes its name from Seven Persons Creek, a local waterway whose own name carries several competing origin stories, none of which has been definitively settled.
According to the 2021 Census conducted by Statistics Canada, Seven Persons was home to 277 residents occupying 107 of its 110 private dwellings, representing a modest increase of 0.7% from the 275 people recorded in 2016. The community covers a land area of 1.05 square kilometres, giving it a population density of roughly 264 people per square kilometre. Earlier census counts show a similar pattern of gradual, steady growth, with 231 residents recorded in 2011 rising to 249 by the 2016 Census as a designated place, reflecting a change of 7.8% over that five-year period. Nearby, Red Rock Coulee is a notable natural landmark in the broader region surrounding the hamlet.