Concho Lake is an irrigation reservoir situated in the town of Concho, in the eastern Arizona grasslands at . Much of the surrounding land is privately owned; the rest is owned by the Bureau of Land Management, but is managed for sport fisheries and wildlife resources by the Arizona Game and Fish.
Concho Lake is a small, shallow, weedy lake. It has with a maximum depth of and an average depth of . A small watershed and nearby spring feed the lake. Following current management plans, the Arizona Game and Fish stocks catchable-sized rainbow trout during spring months. Green sunfish and an occasional largemouth bass also occur at this lake. The lake gets drawn down considerably in the summer for irrigation.