South Branch
- County:
- Nance County
- County Seat:
- No
- Area (mi²):
- 35.7
- State:
- Nebraska
South Branch is located in Nance County, Nebraska. South Branch has a 2025 population of 37 . South Branch is currently declining at a rate of 0% annually and its population has decreased by -2.63% since the most recent census, which recorded a population of 38 in 2020.
The median age in South Branch is 71.4 years: 0 years for males, and 0 years for females. For every 100 females there are 235.7 males.