California Junction
- County:
- Harrison County
- County Seat:
- No
- Area (mi²):
- 0.461
- State:
- Iowa
California Junction is a CDP located in Harrison County, Iowa. California Junction has a 2025 population of 98. California Junction is currently growing at a rate of 7.69% annually and its population has increased by 145% since the most recent census, which recorded a population of 40 in 2020.
The median age in California Junction is 29.4 years: 0 years for males, and 30.4 years for females.