Larkfield-Wikiup is a census-designated place, unincorporated area in Sonoma County, California, United States.

Larkfield-Wikiup is located about 5 miles (8.0 km) north of the city of Santa Rosa.

[3] Nevertheless, the Mark West Creek's seasonal flows pass directly through this region.

As of 2005, the landscape is made up of housing developments, interspersed with vineyards, farms, and light industry.

811 households (23.6%) were made up of individuals, and 325 (9.5%) had someone living alone who was 65 years of age or older.

There were 3,596 housing units at an average density of 677.5 per square mile (261.6/km2), of which 2,312 (67.3%) were owner-occupied, and 1,122 (32.7%) were occupied by renters.

19.5% of all households were made up of individuals, and 6.1% had someone living alone who was 65 years of age or older.

Federally, Larkfield-Wikiup is in California's 2nd congressional district, represented by Democrat Jared Huffman.

[7] In October 2017, the Tubbs Fire destroyed approximately 500 homes in the Larkfield-Wikiup area.

[8] The fire blew in through the Mark West Springs area, ultimately destroying 5,000+ buildings in Sonoma and Napa counties.