Sweetwater is an unincorporated community in Beaver Township, Buffalo County, Nebraska, United States.

Sweetwater is located on Mud Creek, a tributary of the South Loup River.

[3] The community was named for a spring noted by pioneers for its clean drinking water.

[6] The fictional community of Sweet Water in Willa Cather's novel, A Lost Lady may be inspired by Sweetwater, Nebraska.

Like Sweetwater, the fictional town is a railway stop between Omaha and Denver.