Elmo
- County:
- Nodaway County
- County Seat:
- No
- Area (mi²):
- 0.217
- State:
- Missouri
Elmo is a city located in Nodaway County, Missouri. Elmo has a 2026 population of 109. Elmo is currently declining at a rate of -0.91% annually and its population has decreased by -5.22% since the most recent census, which recorded a population of 115 in 2020.