Poso Park is a census-designated place (CDP) in Tulare County, California. Poso Park sits at an elevation of . The 2020 United States census reported Poso Park's population was 9, remaining even from 9 at the 2010 census.
According to the United States Census Bureau, the CDP covers an area of 0.04 square miles (0.11 km), all of it land.
Poso Park first appeared as a census designated place in the 2010 U.S. census.
The 2020 United States census reported that Poso Park had a population of 9, all Non-Hispanic White. The median age was 72.3years. There were 39 housing units, of which 6 were occupied year round.
It is in the Linns Valley-Poso Flat Union School District and the Porterville Unified School District for grades 9-12.