Indianola is a census-designated place in Humboldt County, California. It is located 4 mi south of Arcata, at an elevation of 46 feet (14 m). The place appears on the USGS Arcata South map. Addresses in this neighborhood are part of unincorporated Eureka, California, located entirely within the 95503 ZIP code. The population was 791 at the 2020 census.