Angwin is a census-designated place (CDP) in Napa County, California, best known as the site of Pacific Union College. It is part of the northern San Francisco Bay Area. The population was 2,633 at the 2020 census. Its area code is 707. Its two ZIP codes are 94508 and 94576. It is in the Pacific time zone.
History
The town of Angwin is named for Edwin Angwin (1841–1919), a native of St. Agnes, Cornwall, who in 1875 purchased a parcel within the Rancho La Jota on Howell Mountain and established the Angwin Resort. By the 1900s, Mr. Angwin owned almost of land in the area.
Prior to 1875, Rancho La Jota was held in its entirety by William Campbell Watson, husband of Elizabeth Anne Davis, the granddaughter of George C. Yount. Mr. Watson began to sell off portions of the Rancho in 1875, Mr. Angwin's being among the first parcels. Soon after a community began to emerge with the success of, and in support of, the Angwin Resort.
In 1909, Healdsburg College (formerly Healdsburg Academy), a Seventh-day Adventist college, moved from its location in Healdsburg when it purchased the Angwin Resort for $60,000 to open Pacific Union College.
According to a 1985 KRON-TV news report, more than 80 percent of the population of Angwin belonged to the Seventh-day Adventist Church.
In August 2020, Angwin was evacuated due to the Hennessey Fire.
Geography
According to the United States Census Bureau, the CDP has a total area of , 99.14% of it land and 0.86% of it water.
Angwin is located within the Howell Mountain AVA.
Climate
Angwin's Pacific Union College has maintained a National Weather Service cooperative weather station since 1940. Average January temperatures are a maximum of and a minimum of . There are an average of 35.3 days with highs of or higher and 25.1 days with lows of or lower. The record high temperature was on July 15, 1972. The record low temperature was on December 9, 1972.
Average annual precipitation is . The wettest year was 1983 with and the driest year was 2020 with . The most precipitation in one month was in January 2017. The most precipitation in 24 hours was on October 24, 2021.
Average annual snowfall is . The most snow in one year was in 1952, including in January.
Demographics
thumb|right|260px|Angwin scenery
Angwin first appeared as an unincorporated community in the 1970 U.S. census;
The census reported that 0.0% of residents lived in urban areas, while 100.0% lived in rural areas. It also reported that 77.3% of the population lived in households, 22.7% lived in non-institutionalized group quarters, and no one was institutionalized.
Government
In the California State Legislature, Angwin is in , and in .
In the United States House of Representatives, Angwin is in .