Roberts Island is an island in the San Joaquin River delta, in California.

[2][3][4][5][6][7][8][9] It is part of San Joaquin County, and managed by Reclamation Districts 544 (Upper Roberts Island), 524 (Middle Roberts Island) and 684 (Lower Roberts Island).

[10] Its coordinates are 37°54′18″N 121°23′07″W / 37.9049250°N 121.3852250°W / 37.9049250; -121.3852250 (Roberts Island).

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