Indian Slough is a slough, tributary to the Old River, an old channel of the San Joaquin River in California. Its mouth is at an elevation of 7 feet (2.1 meters), at its confluence with the Old River. Its source is at its confluence with Kellogg Creek at an elevation of 7 feet (2.1 meters) at the location 37°54′58″N 121°36′18″W / 37.91611°N 121.60500°W / 37.91611; -121.60500.

37°54′57″N 121°34′00″W / 37.91583°N 121.56667°W / 37.91583; -121.56667