Augusta is an unincorporated community and census-designated place (CDP) in Lewis and Clark County, Montana, United States.

[6] Augusta is located in northern Lewis and Clark County on the north side of Elk Creek (or the South Fork of the Sun River), which flows out of the Lewis and Clark Range to the southwest and leads northeast to the Sun River, part of the Missouri River watershed.

According to the United States Census Bureau, the Augusta CDP has a total area of 0.93 square miles (2.4 km2), all land.

[18] The Augusta Breeze is an online newspaper, published through the Great Falls Gazette.

[19] U.S. Route 287 passes through Augusta as the northern part of its Main Street, and leads north 26 miles (42 km) to its northern terminus at Choteau and south 38 miles (61 km) to Interstate 15 near Wolf Creek.

Helena, the state capital, is 76 miles (122 km) south of Augusta via US 287 and I-15.

Montana Highway 21 leads east from Augusta 22 miles (35 km) to Simms and is the first in a series of highways that lead east 54 miles (87 km) to Great Falls.