Waldo
- County:
- Russell County
- County Seat:
- No
- Area (mi²):
- 0.376
- State:
- Kansas
Waldo is a city located in Russell County, Kansas. Waldo has a 2026 population of 32. Waldo is currently declining at a rate of 0% annually and its population has increased by 3.23% since the most recent census, which recorded a population of 31 in 2020.
The median household income in Waldo is $65,833 with a poverty rate of 0%. The median age in Waldo is 24.8 years: 69.8 years for males, and 23.7 years for females. For every 100 females there are 112.5 males.