Hollenberg
- County:
- Washington County
- County Seat:
- No
- Area (mi²):
- 0.073
- State:
- Kansas
Hollenberg is a city located in Washington County, Kansas. Hollenberg has a 2026 population of 12. Hollenberg is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 12 in 2020.
The median age in Hollenberg is 66.5 years: 0 years for males, and 66.2 years for females. For every 100 females there are 28.6 males.