Nicasio, California Demographics & Population 2026

A note before these figures: with a population of 91, Nicasio's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Nicasio is a small community located in California, within Marin County. The total population is 91. It ranks as the 1467th most populous out of 1,570 Census-designated places in California.

Age Demographics

The median age in Nicasio is 53.4 years. This is 41% higher than the state median of 37.9 years.

Economy, Income & Housing

The median household income in Nicasio is $250,000+. This is 152% higher than the state median of $99,122. It is also 210% higher than the national median of $80,734. The ACS records no residents below the poverty line in Nicasio. In a community this small the estimate rests on very few survey responses, so it should be read as an absence of measurement rather than a measured absence of poverty. The unemployment rate is 4.8%. This is 27% lower than the state rate of 6.6%. The median home value is $1,968,800. Housing costs are 168% higher than the state median of $734,700. The home-value-to-income ratio of 7.9x suggests that housing affordability is a significant concern for many residents. 100.0% of occupied housing units are owner-occupied. This homeownership rate is 79% higher than the state average of 55.9%.

Race & Ethnicity

Nicasio has a predominantly White (non-Hispanic) population, comprising 92.3% of all residents. Hispanic or Latino residents account for 5.5%. The White (non-Hispanic) population is significantly higher than the state average (92.3% vs 33.8%). The Hispanic or Latino population (5.5%) is well below the state average of 40.2%. The Asian population (2.2%) is well below the state average of 15.3%.

Education

87.5% of residents aged 25 and older hold a bachelor's degree or higher. This places Nicasio in the top 10% of all cities in the state for educational attainment. This is 136% higher than the state rate of 37.1%. Nationally, 35.7% of adults hold at least a bachelor's degree. No surveyed resident aged 25 or older reported leaving school before earning a high school diploma, though a rate of exactly 100% reflects the limits of a small sample. Notably, 33.9% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Nicasio, 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.