Allendale, California Demographics & Population 2026

Population Overview

Allendale is a small community located in California, within Solano County. The total population is 1,734. It ranks as the 927th most populous out of 1,570 Census-designated places in California.

Age Demographics

The median age in Allendale is 52.4 years. This is 38% higher than the state median of 37.9 years. 16.6% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Allendale is $107,679. This is 9% higher than the state median of $99,122. It is also 33% higher than the national median of $80,734. The poverty rate stands at 7.8%. This is 35% lower than the state poverty rate of 12.0%. The unemployment rate is 6.8%. This is 3% higher than the state rate of 6.6%. The median home value is $1,057,600. Housing costs are 44% higher than the state median of $734,700. The home-value-to-income ratio of 9.8x suggests that housing affordability is a significant concern for many residents. 78.1% of occupied housing units are owner-occupied. This homeownership rate is 40% higher than the state average of 55.9%.

Race & Ethnicity

The largest racial or ethnic group in Allendale is White (non-Hispanic), making up 63.0% of the population. Hispanic or Latino residents account for 19.3%. The White (non-Hispanic) population is significantly higher than the state average (63.0% vs 33.8%). The Hispanic or Latino population (19.3%) is well below the state average of 40.2%. The Asian population (4.6%) is well below the state average of 15.3%.

Education

35.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 4% lower than the state rate of 37.1%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 91.9%. Notably, 15.7% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Allendale, California is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against California state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,570 Census-designated places in California. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.