Boulder County, CO Demographics

The total population of Boulder County is estimated to be 328,658 with 166,315 males (50.60%) and 162,343 females (49.40%). There are 3,972 less females than males in Boulder County.
The median household income in Boulder County was $99,948 in 2021, which marked an an increase of 825(0.83%) from $99,123 in 2020. This income is 133.97% of the U.S. median household income of $74,606 (all incomes in 2022 inflation-adjusted dollars).
Per the latest American Community Survey by the Census Bureau, Boulder County sees its highest median household income among householders in the age group of 45 to 64 years old, at $140,051. Overall, the median household income for the county of Boulder County stands at $96,079.
In Boulder County, the median income for all workers aged 15 years and older, regardless of work hours, was $58,632 for males and $35,855 for females. However, when specifically considering full-time, year-round workers within the same age group, the median income was $90,051 for males and $68,511 for females.
In Boulder County, the demographic landscape is diverse, spanning 6 distinct racial categories among households. Among these, American Indian and Alaska Native households have the highest median household income at $193,802, while Black or African American households represent the opposite end with the lowest median household income of $61,423.
In 2022, the population of Boulder County was 327,468, a 0.12% increase year-by-year from 2021. Previously, in 2021, Boulder County's population was 327,075, a decline of 1.16% compared to a population of 330,922 in 2020.
The median age in Boulder County, CO is 37.2, as per 2021 ACS 5-Year Estimates. Of the total population, 15.25% were under the age of 15, 25.31% aged 15 to 29, 44.76% aged 30 to 64, 12.94% aged 65 to 84, and 1.74% were 85 years of age and older.
Racial distribution of Boulder County population: 84.89% are White, 0.90% are Black or African American, 0.44% are American Indian and Alaska Native, 4.72% are Asian, 0.07% are Native Hawaiian and other Pacific Islander, 2.24% are some other race and 6.73% are multiracial.