Patagonia Lake State Park is a state park of Arizona, US, containing Patagonia Lake. The 2.5-mile-long (4.0 km), 250-acre (100 ha) lake located near Patagonia, Arizona, is a popular southern Arizona site for fishing, camping, boat rental, picnicking, hiking, and birding. Located inside the park is the recently established Sonoita Creek State Natural Area, Arizona's first major state natural area. Created by the damming of Sonoita Creek, the lake is habitat for reproducing largemouth bass, black crappie, bluegill, green sunfish, flathead catfish, threadfin shad, redear sunfish, channel catfish, and American bullfrogs. Rainbow trout are stocked every three weeks from October to March. Sonoita Creek contains black bullhead, red shiner, mosquitofish, crayfish, American bullfrogs, largemouth bass, Gila topminnows, speckled dace, longfin dace, Sonora suckers, and desert suckers. Special events include an annual mariachi festival in March and bird tours and interpretive programs on request.

Patagonia Lake State Park is located on State Route 82, 7 miles (11 km) south of Patagonia, Arizona.

• Patagonia Lake State Park