Walthill is a village in Thurston County, Nebraska, United States, within the Omaha Reservation. The population was 780 at the 2010 census.
Walthill was platted in 1906 when the Chicago, Burlington and Quincy Railroad was extended to that point. It was named for Walter "Walt" Hill, son of railroad executive James J. Hill.
Walthill is located at 42°8′55″N 96°29′26″W (42.148744, -96.490434). It is located within the Omaha Reservation.
According to the United States Census Bureau, the village has a total area of 0.43 square miles (1.11 km2), all land.
At the 2010 census, there were 780 people, 207 households and 158 families residing in the village. The population density was 1,814.0 inhabitants per square mile (700.4/km2). There were 240 housing units at an average density of 558.1 per square mile (215.5/km2). The racial makeup of the village was 15.6% White, 0.6% African American, 80.9% Native American, 0.1% Asian, 0.3% Pacific Islander, 0.3% from other races, and 2.2% from two or more races. Hispanic or Latino of any race were 3.3% of the population.