Sasabe is a small hamlet in the Altar Valley of southern Pima County, Arizona, United States, immediately north of the international border with Mexico. It hosts a minor border crossing, an adobe sales outlet, a public school, a guest ranch, a general store with fuel pumps, a weekend bar, and a post office serving the ZIP Code of 85633. In 2010, the population of the 85633 ZCTA, including Sasabe, was 54.