[2] It is located on the Pacific Ocean, 4 miles (6 km) north of Mendocino,[5] at an elevation of 82 feet (25 m).

[3] For statistical purposes, the United States Census Bureau has defined Caspar as a census-designated place (CDP).

[7] Multiple heirs to the Caspar Lumber Company sold their holdings to Georgia-Pacific and a pair of private investors in 1989.

[8] This offer was facilitated by a professor and team of graduate student community planners from the University of California, Berkeley.

The process early on committed to consensus and inclusive self-governance, and identified several sacred spaces, principal among them the headlands, once the site of the Caspar Lumber Company's mill, and managed the acquisition of the 30-acre (12 ha) headlands parcel in partnership with the Trust for Public Land and the Mendocino Land Trust, which acquired the adjoining beach in 1999.

CCI continues to attempt to acquire the remainder of the property in accordance with the vision of the community since its formation.

[12] The Caspar post office opened in 1874[5] and closed on November 15, 1986, when postmaster Georgia Johnson retired.

[14] The Caspar Inn existed continuously as a roadhouse from its founding during the heyday of the logging era in 1906 until its closure in February 2013.

[15] Caspar is along the western edge of Mendocino County and is traversed by California State Route 1, which leads north 6 miles (10 km) to Fort Bragg and south 4 miles (6 km) to Mendocino.

According to the United States Census Bureau, the CDP covers an area of 3.0 square miles (7.8 km2), all of it land.

There were 336 housing units at an average density of 112.3 per square mile (43.4/km2), of which 164 (65.1%) were owner-occupied, and 88 (34.9%) were occupied by renters.

[34] Federally, Caspar is in California's 2nd congressional district, represented by Democrat Jared Huffman.