Different vintage years of estimates are not comparable.  Estimates are not comparable to other geographic levels due to methodology differences that may exist between different data sources. QuickFacts provides statistics for all states and counties, and for cities and towns with a population of 5,000 or more. Unlike the Census—which is an exact count of people and households every ten years—ACS statistics are estimated based on a representative survey sample. In 2018, Snohomish County, WA had a population of 815k people with a median age of 37.8 and a median household income of $87,440. Snohomish County’s median was higher than both the state ($74,073) and the nation ($61,937). Between 2017 and 2018 the population of Snohomish County, WA grew from 801,633 to 814,901, a 1.66% increase and its median household income grew from $82,595 to $87,440, a 5.87% increase. Profiles for 283 cities, towns and other populated places in Snohomish County Washington. Click the Quick Info  icon to the left of each row in TABLE view to learn about sampling error. miles Water Area: 109.02 sq. Native Hawaiian and Other Pacific Islander, High school graduate (includes equivalent), Agriculture, forestry, fishing, hunting and mining, Arts, entertainment, recreation, accommodation and food services, Educational services, health care and social assistance, Finance, insurance, real estate, rental, and leasing, Other services except public administration, Professional, scientific, management, administrative and waste management services, Transportation, warehousing and utilities, Construction, extraction, maintenance, and repair occupations, Management, professional, and related occupations, Production, transportation, and material moving occupations, Public transportation (excluding taxicab), Average household size of owner-occupied unit, Average household size of renter-occupied unit.
How is Snohomish County's population distributed by race?
This slight imbalance is apparent in the U.S. population data. A person who identifies as Hispanic may be of any race or combination of races. This was 0.224% of total US population and 10% of total Washington state population.

These categories are based on self-identification and are "not an attempt to define race biologically, anthropologically, or genetically," according to the Census Bureau. The ACS adheres to definitions of race and ethnicity set forth by the 1997 Office of Management and Budget (OMB) standards. Population estimates, July 1, 2019, (V2019), Population estimates base, April 1, 2010, (V2019), Population, percent change - April 1, 2010 (estimates base) to July 1, 2019, (V2019), American Indian and Alaska Native alone, percent, Native Hawaiian and Other Pacific Islander alone, percent, White alone, not Hispanic or Latino, percent, Owner-occupied housing unit rate, 2014-2018, Median value of owner-occupied housing units, 2014-2018, Median selected monthly owner costs -with a mortgage, 2014-2018, Median selected monthly owner costs -without a mortgage, 2014-2018, Living in same house 1 year ago, percent of persons age 1 year+, 2014-2018, Language other than English spoken at home, percent of persons age 5 years+, 2014-2018, Households with a computer, percent, 2014-2018, Households with a broadband Internet subscription, percent, 2014-2018, High school graduate or higher, percent of persons age 25 years+, 2014-2018, Bachelor's degree or higher, percent of persons age 25 years+, 2014-2018, With a disability, under age 65 years, percent, 2014-2018, Persons without health insurance, under age 65 years, percent, In civilian labor force, total, percent of population age 16 years+, 2014-2018, In civilian labor force, female, percent of population age 16 years+, 2014-2018, Total accommodation and food services sales, 2012 ($1,000), Total health care and social assistance receipts/revenue, 2012 ($1,000), Total manufacturers shipments, 2012 ($1,000), Total merchant wholesaler sales, 2012 ($1,000), Mean travel time to work (minutes), workers age 16 years+, 2014-2018, Median household income (in 2018 dollars), 2014-2018, Per capita income in past 12 months (in 2018 dollars), 2014-2018, Total employment, percent change, 2017-2018, Longitudinal Employer-Household Dynamics (LEHD). Scope: population of Snohomish County, selected county subdivisions in Snohomish County, and entities that contain Snohomish County. Clear 2 Table. Snohomish County, Washington; Everett city, Washington. miles Land Area: 2,087.27 sq. The following tables are used: • Total Population trend and map: Table B01003, • Total Population by Age and Sex: Table B01001. . How does the population in Snohomish County differ by age and sex? Snohomish County Population Change by Age Group, shown by decade .