Riverside
- County:
- Trego County
- County Seat:
- No
- Area (mi²):
- 114.97
- State:
- Kansas
Riverside is located in Trego County, Kansas. Riverside has a 2025 population of 86 . Riverside is currently growing at a rate of 1.18% annually but its population has decreased by -1.15% since the most recent census, which recorded a population of 87 in 2020.
The median age in Riverside is 34.9 years: 63.1 years for males, and 34.9 years for females. For every 100 females there are 59.5 males.