Mill Creek, Washington Population 2021

20,737
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Mill Creek is a city located in Washington. With a 2020 population of 20,737, it is the 56th largest city in Washington and the 1798th largest city in the United States . Mill Creek is currently declining at a rate of -0.38% annually but its population has increased by 13.66% since the most recent census, which recorded a population of 18,244 in 2010. Mill Creek reached it's highest population of 20,977 in 2018. Spanning over 5 miles, Mill Creek has a population density of 4,466 people per square mile.

The average household income in Mill Creek is $128,291 with a poverty rate of 4.34%. The median rental costs in recent years comes to $1,812 per month, and the median house value is $536,800. The median age in Mill Creek is 38.3 years, 37.5 years for males, and 39.2 years for females.

Mill Creek Demographics

According to the most recent ACS, the racial composition of Mill Creek was:

  • White: 66.98%
  • Asian: 19.03%
  • Two or more races: 6.62%
  • Black or African American: 3.39%
  • Other race: 3.32%
  • Native American: 0.35%
  • Native Hawaiian or Pacific Islander: 0.31%
The current population of Mill Creek, Washington is 20,737 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 20,977.The last official US Census in 2010 recorded the population at 18,244.

Mill Creek, Washington Population 2021

Population by Race

Race Population Percentage
White13,76766.98%
Asian3,91219.03%
Two or More Races1,3606.62%
Black or African American6973.39%
Some Other Race6833.32%
American Indian and Alaska Native710.35%
Native Hawaiian and Other Pacific Islander630.31%
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Mill Creek Population by Race

Mill Creek Population Pyramid $2021

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Mill Creek Median Age

38.3


Total

37.5


Male

39.2


Female

Mill Creek Adults

There are 16,082 adults, (3,252 of whom are seniors) in Mill Creek.

Mill Creek Age Dependency

60.2

Age Dependency Ratio

25.3

Old Age Dependency Ratio

34.8

Child Dependency Ratio

Mill Creek Sex Ratio

Female

10,878

52.93%

Male

9,675

47.07%

Mill Creek Population by Age

Mill Creek Renter vs Owner Occupied by Household Type

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Mill Creek Household Types

Type Owner Renter
Married77.7%22.3%
All60.2%39.8%
Female43.3%56.7%
Non Family40.5%59.5%
Male27.2%72.8%

60.2%

Rate of Home Ownership

Mill Creek Households and Families

Type Count Average Size Owned
All8,3622.4560.2
Married4,5712.9977.7
Non Family2,6931.2540.5
Female5803.143.3
Male5183.1227.2

2.92

Average Family Size

2.45

Average Household Size

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Mill Creek Households by Type

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Education Attained Count Percentage
Less Than 9th Grade1430.98%
9th to 12th Grade2101.44%
High School Graduate2,09914.35%
Some College3,10521.23%
Associates Degree1,53210.48%
Bachelors Degree4,86133.24%
Graduate Degree2,67318.28%
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Mill Creek Educational Attainment by Sex (over 25)

Mill Creek Educational Attainment by Race

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Race Total High School Bachelors
White10,2579,9885,029
Asian2,5612,4851,840
Hispanic655647195
2+ Races544544212
Black451451143
Other Race34534582
Islander636363
Native American49499

The highest rate of high school graduation is among black people with a rate of 100.00%.

The highest rate of bachelors degrees is among islander people with a rate of 100.00%.

Mill Creek Educational Attainment by Race

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Name Average Male Female
Overall$63,851$95,099$41,291
Less Than 9th Grade$62,188$$
High School Graduate$42,254$63,941$30,592
Some College$45,489$64,671$35,753
Bachelors Degree$88,067$105,636$59,831
Graduate Degree$93,273$135,911$70,694

$63,851

Average Earnings

$95,099

Average Male

$41,291

Average Female

Mill Creek Earnings by Educational Attainment

Mill Creek Language by Age

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Mill Creek Language

77.51% of Mill Creek residents speak only English, while 22.49% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 12.80% of the population.

Mill Creek Language

Mill Creek Poverty by Race

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Name Total In Poverty Poverty Rate
White13,1966024.56%
Multiple1,32313810.43%
Black690679.71%
Hispanic1,189625.21%
Other671629.24%
Asian3,912190.49%

4.34%

Overall Poverty Rate

3.62%

Male Poverty Rate

4.99%

Female Poverty Rate

Poverty in Mill Creek

The race most likely to be in poverty in Mill Creek is Multiple, with 10.43% below the poverty level.

The race least likely to be in poverty in Mill Creek is Asian, with 0.49% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.06%. Among those working part-time, it was 7.17%, and for those that did not work, the poverty rate was 8.11%.

Mill Creek Poverty

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Name Poverty
Some College5.85%
Less Than 9th Grade5.10%
High School4.46%
Bachelors or Greater1.81%

Mill Creek Poverty Rate by Education

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Rate Poverty
Male Unemployed13.33%
Female Employed2.88%
Male Employed2.48%
Female Unemployed0.00%

Mill Creek Poverty Rate by Employment Status and Sex

Mill Creek Income by Household Type

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Name Median Mean
Households$103,750$128,291
Families$130,916$149,224
Married Families$145,633-
Non Families$67,924$79,318
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Income by Household Type

Mill Creek Marital Status

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Marriage Rates

58.7%

Overall Marriage Rate

63.6%

Male Marriage Rate

54.3%

Female Marriage Rate

Mill Creek Married by Age and Sex

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Mill Creek Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 55-64.

Mill Creek Marital Status by Race

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Mill Creek Marital Status

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1,106

Number of Veterans

1,035

Male Veterans

71

Female Veterans

War Veterans
Vietnam495
Second Gulf War229
First Gulf War132
Korea93
World War II17

Mill Creek Veterans by War

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Age Group Veterans
65 to 74350
35 to 54243
75+218
55 to 64155
18 to 34140

Mill Creek Veterans by Age

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Name Veterans % of Total
White9608.40%
Asian461.64%
Black427.51%
2+ Races293.52%
Native American2959.18%
Hispanic263.82%

Mill Creek Veterans by Race

Mill Creek Veterans by Education

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4.25%

Veteran Poverty Rate

20.71%

Veteran Disability Rate

Mill Creek Veterans by Education

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68.6%

Labor Force Participation

66.3%

Employment Rate

3.2%

Unemployment Rate

Mill Creek Employment by Age

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Mill Creek Employment by Race

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Mill Creek Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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44.26%

Born in Mill Creek

81.33%

Native Born

18.67%

Foreign Born

8.43%

Non Citizen

10.24%

Naturalized

Place of Birth

81.33% of Mill Creek residents were born in the United States, with 44.26% having been born in Washington. 8.43% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Mill Creek Place of Birth

Year Population Growth Annual Growth Rate
202120,737-80-0.38%
202020,817-80-0.38%
201920,897-80-0.38%
201820,9771030.49%
201720,8747193.57%
201620,1552891.45%
201519,8667984.19%
201419,0683842.06%
201318,684840.45%
201218,6002051.11%
201118,3951280.70%
201018,2676,7424.71%
200011,5254,3534.86%
19907,1720.00%

Mill Creek Population by Year