|Location||Santa Cruz County, Arizona, United States|
|Primary inflows||Sonoita Creek|
|Basin countries||United States|
|Surface area||260 acres (110 ha)|
|Average depth||90 ft (27 m)|
|Surface elevation||4,050 ft (1,230 m)|
Patagonia Lake is a man-made reservoir in Santa Cruz County, Arizona, located southwest of the town of Patagonia, Arizona and northeast of Nogales. The lake was created by damming Sonoita Creek, and is a popular area for boating and sport fishing. Facilities are maintained by Arizona State Parks as part of Patagonia Lake State Park.
- Arizona Game and Fish Department, Information and Education Division (2007). Arizona Fishin' Holes. Phoenix, AZ: Arizona Game and Fish Department.