Andrus Island is an island in the Sacramento-San Joaquin River Delta in Sacramento County, California, twenty kilometres northeast of Antioch.^[2] The 3,000-hectare (7,400-acre) island is bounded on the north, and northwest by the Sacramento River, on the west, Georgiana Slough, on the southeast, Mokelumne River, and San Joaquin River, on the southwest Jackson Slough, and Seven Mile Slough. The island is entirely within the bounds of the immense Rio Vista Gas Field, although well drilling pads and associated infrastructure make up only a small part of its land use, which is mainly agriculture. It is managed by Reclamation Districts 556, 407 and 317.^[3]

Andrus Island

USGS aerial imagery of the island.
Andrus Island Show map of Sacramento-San Joaquin River Delta Andrus Island Show map of San Francisco Bay Area Andrus Island Show map of California Andrus Island Show map of the United States
Geography
Location	Northern California
Coordinates	38°09′28″N 121°35′54″W / 38.157695°N 121.598287°W / 38.157695; -121.598287 (Andrus Island)[1]
Adjacent to	San Joaquin River
Administration
United States
State	California
County	Sacramento

The city of Isleton is on Andrus Island.