title: Union Island (California)
text: # Union Island (California)
  
  Union Island is a small island in the San Joaquin River delta, in California. It is part of San Joaquin County, and managed by Reclamation Districts 1 and 2. Its coordinates are 37°50′15″N 121°30′56″W﻿ / ﻿37.8374268°N 121.5155042°W﻿ / 37.8374268; -121.5155042﻿ (Union Island).
  
  