According to the United States Census Bureau, the town has a total area of 0.17 square miles (0.44 km2), all land.

The community was planned on a broad grid with a central town square as its dominant feature.

[6] Hingham prospered in its early years with the opening of a school, hospital, several churches and over forty businesses.

Community members have developed the town square into one of the best parks on the Hi-Line, much of it through volunteer work and donations.

The Hingham School was established in 1910 with the Rangers as their mascot and red, white and black as their colors.

In recent decades Hingham's population has declined due to lack of economic opportunity.

The racial makeup of the town was 91.5% White, 3.4% Native American, 0.8% Asian, and 4.2% from two or more races.

Hingham experiences a semi-arid climate (Köppen BSk) with long, cold, dry winters and hot summers.

[10] Amtrak’s Empire Builder, which operates between Seattle/Portland and Chicago, passes through the town on BNSF tracks, but makes no stop.