&sq=Envato&lang=en&file=File:Aerial_view_of_Benicia-Martinez_Bridge_3_(cropped).jpg) An aerial photo of the Seal islands, viewed from the north, in 2009. | |
&sq=Envato&lang=en&file=File:Sacramento-San_Joaquin_Delta_OSM_Cycle_Large.png)  Seal Islands &sq=Envato&lang=en&file=File:Location_Map_San_Francisco_Bay_Area.png) Seal Islands &sq=Envato&lang=en&file=File:USA_California_location_map.svg) Seal Islands &sq=Envato&lang=en&file=File:Usa_edcp_location_map.svg) Seal Islands | |
| Geography | |
|---|---|
| Location | Northern California |
| Coordinates | 38°03′20″N 122°02′50″W / 38.05556°N 122.04722°W[1] |
| Adjacent to | Suisun Bay |
| Administration | |
| State |  California |
| County | Contra Costa |
Seal Islands are a pair of islands in Suisun Bay at the mouth of the Sacramento-San Joaquin River Delta in Contra Costa County, California, 10 km east of Benicia, and 500 metres off-shore from the former Concord Naval Weapons Station and Port Chicago Naval Magazine.