Angwin is a census-designated place (CDP)[3] in Napa County, California, best known as the site of Pacific Union College.

It is part of the northern San Francisco Bay Area.

[5] 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.

[6] According to a 1985 KRON-TV news report, more than 80 percent of the population of Angwin belonged to the Seventh-day Adventist Church.

[7] In August 2020, Angwin was evacuated due to the Hennessey Fire.

[8] According to the United States Census Bureau, the CDP has a total area of 4.9 square miles (13 km2), 99.14% of it land and 0.86% of it water.

The racial makeup of Angwin was 2,124 (69.6%) White, 139 (4.6%) African American, 22 (0.7%) Native American, 339 (11.1%) Asian, 5 (0.2%) Pacific Islander, 234 (7.7%) from other races, and 188 (6.2%) from two or more races.

There were 874 housing units at an average density of 178.7 per square mile (69.0/km2).

The racial makeup of the CDP in 2010 was 59.7% non-Hispanic White, 4.2% non-Hispanic Black or African American, 0.3% Native American, 10.7% Asian, 0.2% Pacific Islander, 0.4% from other races, and 4.0% from two or more races.

In the California State Legislature, Angwin is in the 3rd Senate District, represented by Democrat Christopher Cabaldon, and in the 4th Assembly District, represented by Democrat Cecilia Aguiar-Curry.