Stonyford (formerly, Stony Ford) is a census-designated place^[3] in Colusa County, California. It lies at an elevation of 1184 feet (361 m). Its zip code is 95979 and its area code is 530. Stonyford's population was 149 at the 2010 census.

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Stonyford
census-designated place
Stonyford Location in California
Coordinates: 39°22′31″N 122°32′39″W
Country	United States
State	California
County	Colusa County
Area [1]
• Total	2.897 sq mi (7.504 km2)
• Land	2.897 sq mi (7.504 km2)
• Water	0 sq mi (0 km2)  0%
Elevation [2]	1,184 ft (361 m)
Population  (2010)
• Total	149
• Density	51/sq mi (20/km2)
Time zone	UTC-8 (Pacific (PST))
• Summer (DST)	UTC-7 (PDT)
ZIP Code	95979
Area code	530
FIPS code	06-75154
GNIS feature IDs	1659881, 2583153

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The 2010 United States Census^[4] reported that Stonyford had a population of 149. The population density was 51.4 inhabitants per square mile (19.8/km²). The racial makeup of Stonyford was 127 (85.2%) White, 0 (0.0%) African American, 4 (2.7%) Native American, 0 (0.0%) Asian, 1 (0.7%) Pacific Islander, 12 (8.1%) from other races, and 5 (3.4%) from two or more races. Hispanic or Latino of any race were 22 persons (14.8%).

The Census reported that 149 people (100% of the population) lived in households, 0 (0%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized.

There were 69 households, out of which 15 (21.7%) had children under the age of 18 living in them, 33 (47.8%) were heterosexual married couples living together, 10 (14.5%) had a female householder with no husband present, 4 (5.8%) had a male householder with no wife present. There were 4 (5.8%) unmarried heterosexual partnerships, and 1 (1.4%) homosexual married couples or partnerships. 17 households (24.6%) were made up of individuals, and 5 (7.2%) had someone living alone who was 65 years of age or older. The average household size was 2.16. There were 47 families (68.1% of all households); the average family size was 2.51.

The population was spread out, with 25 people (16.8%) under the age of 18, 8 people (5.4%) aged 18 to 24, 22 people (14.8%) aged 25 to 44, 62 people (41.6%) aged 45 to 64, and 32 people (21.5%) who were 65 years of age or older. The median age was 50.4 years. For every 100 females, there were 93.5 males. For every 100 females age 18 and over, there were 93.8 males.

There were 90 housing units at an average density of 31.1 per square mile (12.0/km²), of which 69 were occupied, of which 47 (68.1%) were owner-occupied, and 22 (31.9%) were occupied by renters. The homeowner vacancy rate was 2.1%; the rental vacancy rate was 4.3%. 97 people (65.1% of the population) lived in owner-occupied housing units and 52 people (34.9%) lived in rental housing units.

In the state legislature, Stonyford is in the 4th Senate District, represented by Democrat Marie Alvarado-Gil,^[5] and the 3rd Assembly District, represented by Republican James Gallagher.^[6] Federally, Stonyford is in California's 3rd congressional district, represented by Republican Kevin Kiley.^[7]

This region experiences hot and dry summers, with average monthly temperatures above 71.6 °F. According to the Köppen Climate Classification system, Stonyford has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.^[8]