Tohatchi (Navajo: Tó Haachi) is a census-designated place (CDP) in McKinley County, New Mexico, United States. The population was 1,037 at the 2000 census. Tohatchi is located near the border of the Navajo Nation.
Tohatchi is located at 35°51′1″N 108°45′3″W / 35.85028°N 108.75083°W / 35.85028; -108.75083 (35.850262, -108.750709).
According to the United States Census Bureau, the CDP has a total area of 6.3 square miles (16.3 km²), of which, 6.2 square miles (16.0 km²) of it is land and 0.1 square miles (0.3 km²) of it (2.06%) is water.