Loma is a census-designated place (CDP) in Chouteau County, Montana, United States.

The next year, the American Fur Company established another trading post, Fort McKenzie, a few miles upstream of the old site.

[4] During the 1860s, businessmen built a townsite near the confluence of the Marias and the Missouri rivers, called Ophir.

[4] Loma is located in central Chouteau County at the confluence of the Marias and Missouri rivers.

According to the United States Census Bureau, the CDP has a total area of 3.42 square miles (8.86 km2), all land.

[3] The Loma area's dry climate supports a natural vegetation of low shrubs and grass.