Mill Creek, WA Profile: Facts & Data


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Mill Creek, Washington - Basic Facts

The City of Mill Creek had a population of 21,387 as of July 1, 2018. Mill Creek ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Washington. See peer rankings below.

The primary coordinate point for Mill Creek is located at latitude 47.864 and longitude -122.2071 in Snohomish County. The formal boundaries for the City of Mill Creek (see map below) encompass a land area of 4.66 sq. miles and a water area of 0.01 sq. miles. Snohomish County is in the Pacific time zone (GMT -8). The elevation is 377 feet.

The City of Mill Creek (GNIS ID: 2411108) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Washington is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The City of Mill Creek is located within Edmonds Division of Snohomish County.

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  1. Mill Creek 2018 Demographic Data
  2. Growth Rates for Mill Creek (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Washington Research Tools (Easy Tools & Current Data)
  3. Washington Data Comparison Tool - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


Mill Creek, WA Data & Demographics (As of July 1, 2018)


Total Population 21,387
Population in Households 21,374
Population in Familes 17,302
Population in Group Qrtrs 13
Population Density2 4,590
Diversity Index3 55


Median Household Income $101,378
Average Household Income $124,472
Per Capita Income $50,445


Total Housing Units 8,917 (100%)
Owner Occupied HU 5,418 (60.8%)
Renter Occupied HU 3,262 (36.6%)
Vacant Housing Units 237 ( 2.7%)
Median Home Value $471,086
Average Home Value $532,345


Total Households 8,680
Average Household Size 2.46
Family Households 5,661
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2018 2018-2023
Population 1.96% 1.76%
Households 1.71% 1.68%
Families 1.72% 1.65%
Median Household Income   1.98%
Per Capita Income   2.52%

Mill Creek, WA - Peer Comparisons by Rank and Percentile

The table below compares Mill Creek to the other 627 incorporated cities, towns and CDPs in Washington by rank and percentile using July 1, 2018 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 62 90th
Population Density # 23 96th
Diversity Index # 151 76th
Median Household Income # 68 89th
Per Capita Income # 52 92nd

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