Inyo County, California: Geography, Borders & Key Facts

Inyo County sprawls across the eastern flank of California, a vast high-desert landscape framed by the Sierra Nevada to the west and the Nevada state line to the east. Covering 10,227 square miles (26,487 km²), it is the second-largest county by area in California—larger than several U.S. states—yet home to only about 19,000 residents.

Bordering Counties & State

• North: Mono County
• Southwest: Fresno County
• South: Tulare County
• Southeast: Kern County
• East: Nevada (Esmeralda & Nye counties)

County Seat & Major Communities

Independence (population ~600) has served as the county seat since 1866. Other notable towns include Bishop (the commercial hub), Lone Pine, Big Pine, and Death Valley Junction.

Geographic Highlights

• Mount Whitney (14,505 ft / 4,421 m) – highest summit in the contiguous U.S., on the Inyo–Tulare border.
• Badwater Basin (−282 ft / −86 m) – lowest point in North America, inside Death Valley National Park.
• Owens Valley – a deep graben between the Sierra Nevada and the White/Inyo Mountains, drained by the Owens River.
• Ancient Bristlecone Pine Forest – home to Methuselah, a ~4,850-year-old Pinus longaeva.

Climate & Economy

Arid to semi-arid; summer highs often exceed 100 °F (38 °C) in the valleys, while winter nights drop well below freezing at elevation. Tourism (Death Valley, hiking, filming locations), government employment, and limited agriculture (alfalfa, cattle) drive the economy.