Avery is a census-designated place (CDP) in Calaveras County, California, United States. The population was 646 at the 2010 census, down from 672 at the 2000 census. Avery is located on State Route 4 and is home to the oldest continually operating hotel in the county, the Avery Hotel Restaurant & Saloon. Built in 1853, it was known as the "Half Way House," being located between Murphys, Arnold, and Calaveras Big Trees State Park.

According to the United States Census Bureau, the CDP has a total area of 4.5 square miles (12 km), all of it land.

The place is named after George J. Avery, its first postmaster. The first post office was established in 1885, closed in 1943, and re-established in 1949.

Historical population

Census	Pop.	Note	%±
2000	672		—
2010	646		−3.9%
2020	636		−1.5%
U.S. Decennial Census 1850–1870 1880-1890 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010

At the 2010 census Avery had a population of 646. The population density was 143.5 inhabitants per square mile (55.4/km). The racial makeup of Avery was 604 (93.5%) White, 5 (0.8%) African American, 7 (1.1%) Native American, 3 (0.5%) Asian, 1 (0.2%) Pacific Islander, 2 (0.3%) from other races, and 24 (3.7%) from two or more races. Hispanic or Latino of any race were 38 people (5.9%).

The whole population lived in households, no one lived in non-institutionalized group quarters and no one was institutionalized.

There were 281 households, 68 (24.2%) had children under the age of 18 living in them, 149 (53.0%) were opposite-sex married couples living together, 22 (7.8%) had a female householder with no husband present, 7 (2.5%) had a male householder with no wife present. There were 20 (7.1%) unmarried opposite-sex partnerships, and 2 (0.7%) same-sex married couples or partnerships. 80 households (28.5%) were one person and 30 (10.7%) had someone living alone who was 65 or older. The average household size was 2.30. There were 178 families (63.3% of households); the average family size was 2.80.

The age distribution was 129 people (20.0%) under the age of 18, 40 people (6.2%) aged 18 to 24, 126 people (19.5%) aged 25 to 44, 210 people (32.5%) aged 45 to 64, and 141 people (21.8%) who were 65 or older. The median age was 48.1 years. For every 100 females, there were 105.7 males. For every 100 females age 18 and over, there were 102.0 males.

There were 388 housing units at an average density of 86.2 per square mile (33.3/km),of which 281 were occupied, 218 (77.6%) by the owners and 63 (22.4%) by renters. The homeowner vacancy rate was 7.6%; the rental vacancy rate was 11.3%. 495 people (76.6% of the population) lived in owner-occupied housing units and 151 people (23.4%) lived in rental housing units.

In the state legislature, Avery is in the 8th Senate District, represented by Democrat Angelique Ashby, and the 5th Assembly District, represented by Republican Joe Patterson. Federally, Avery is in California's 4th congressional district, represented by Democrat Mike Thompson.

• U.S. Geological Survey Geographic Names Information System: Avery, California