City Sun
- County:
- Luna County
- County Seat:
- No
- Area (mi²):
- 0.253
- State:
- New Mexico
City Sun is a CDP located in Luna County, New Mexico. City Sun has a 2025 population of 52. City Sun is currently growing at a rate of 6.12% annually and its population has increased by 40.54% since the most recent census, which recorded a population of 37 in 2020.