It's a small village of Tohono O'odham Nation. It's located 7 miles southeast of Sells and 13 miles northwest of San Miguel. Below is a google earth map of Topowa. Topowa is a cdp or census designated place. 2010 population is 299. Topawa has 135 housing units with 95 lived in. Average household size is 3.1 persons per housing unit. Baboquivari Mountains are located 10 miles east of Topowa. As a result of those Baboquivari Mountains, desert conditions around Topowa may be less intense than further west. Topowa does not have an appearance of a town. Housing units are scattered over a large area.
Google Earth Map of Topowa