Grinnell, Iowa Population 2021

9,134
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Grinnell is a city located in Poweshiek County Iowa. With a 2020 population of 9,134, it is the 45th largest city in Iowa and the 3289th largest city in the United States . Grinnell is currently growing at a rate of 0.10% annually but its population has decreased by -0.91% since the most recent census, which recorded a population of 9,218 in 2010. Grinnell reached it's highest population of in . Spanning over 6 miles, Grinnell has a population density of 1,615 people per square mile.

The average household income in Grinnell is $68,673 with a poverty rate of 13.27%. The median rental costs in recent years comes to $739 per month, and the median house value is $137,500. The median age in Grinnell is 37.1 years, 31.4 years for males, and 39.8 years for females.

Grinnell Demographics

According to the most recent ACS, the racial composition of Grinnellwas:

  • White: 90.01%
  • Asian: 4.17%
  • Black or African American: 3.65%
  • Two or more races: 1.61%
  • Other race: 0.55%
  • Native American: 0.00%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Grinnell, Iowa is 9,134 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 9,116.The last official US Census in 2010 recorded the population at 9,218.

Grinnell, Iowa Population 2021

Population by Race

Race Population Percentage
White8,12990.01%
Asian3774.17%
Black or African American3303.65%
Two or More Races1451.61%
Some Other Race500.55%
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Grinnell Population by Race

Grinnell Population Pyramid $2021

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Grinnell Median Age

37.1


Total

31.4


Male

39.8


Female

Grinnell Adults

There are 7,564 adults, (1,865 of whom are seniors) in Grinnell.

Grinnell Age Dependency

58.5

Age Dependency Ratio

32.7

Old Age Dependency Ratio

25.7

Child Dependency Ratio

Grinnell Sex Ratio

Female

4,867

53.89%

Male

4,164

46.11%

Grinnell Population by Age

Grinnell Renter vs Owner Occupied by Household Type

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Grinnell Household Types

Type Owner Renter
Female31.8%68.2%
Non Family48.7%51.3%
All59.4%40.6%
Male70.4%29.6%
Married81.2%18.8%

59.4%

Rate of Home Ownership

Grinnell Households and Families

Type Count Average Size Owned
All3,719259.4
Non Family1,7361.1848.7
Married1,3652.8881.2
Female4662.2931.8
Male1522.6670.4

2.66

Average Family Size

2

Average Household Size

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Grinnell Households by Type

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Education Attained Count Percentage
Less Than 9th Grade1582.92%
9th to 12th Grade2133.94%
High School Graduate1,80333.31%
Some College97618.03%
Associates Degree4558.41%
Bachelors Degree90916.80%
Graduate Degree89816.59%
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Grinnell Educational Attainment by Sex (over 25)

Grinnell Educational Attainment by Race

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Race Total High School Bachelors
White5,1124,7821,644
Black12712763
Hispanic867666
Asian501919
2+ Races373715
Other Race10

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 hispanic people with a rate of 76.74%.

Grinnell Educational Attainment by Race

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Name Average Male Female
Overall$41,308$47,976$33,125
Less Than 9th Grade$40,588$40,980$
High School Graduate$28,973$37,045$21,458
Some College$35,651$53,667$26,734
Bachelors Degree$44,441$73,929$38,295
Graduate Degree$63,929$66,333$63,400

$41,308

Average Earnings

$47,976

Average Male

$33,125

Average Female

Grinnell Earnings by Educational Attainment

Grinnell Language by Age

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Grinnell Language

93.42% of Grinnell residents speak only English, while 6.58% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 2.45% of the population.

Grinnell Language

Grinnell Poverty by Race

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Name Total In Poverty Poverty Rate
White6,91788112.74%
Black1938242.49%
Asian732331.51%

13.27%

Overall Poverty Rate

8.63%

Male Poverty Rate

17.81%

Female Poverty Rate

Poverty in Grinnell

The race most likely to be in poverty in Grinnell is Black, with 42.49% below the poverty level.

The race least likely to be in poverty in Grinnell is White, with 12.74% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.24%. Among those working part-time, it was 27.26%, and for those that did not work, the poverty rate was 16.82%.

Grinnell Poverty

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Name Poverty
Some College16.91%
High School12.23%
Less Than 9th Grade9.89%
Bachelors or Greater4.91%

Grinnell Poverty Rate by Education

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Rate Poverty
Female Unemployed93.51%
Male Unemployed23.57%
Female Employed12.93%
Male Employed6.74%

Grinnell Poverty Rate by Employment Status and Sex

Grinnell Income by Household Type

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Name Median Mean
Households$46,750$68,673
Families$68,250$92,211
Married Families$86,683-
Non Families$33,134$39,681
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Income by Household Type

Grinnell Marital Status

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Marriage Rates

36.7%

Overall Marriage Rate

42.7%

Male Marriage Rate

31.9%

Female Marriage Rate

Grinnell Married by Age and Sex

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Grinnell 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 45-54.

Grinnell Marital Status by Race

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Grinnell Marital Status

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548

Number of Veterans

494

Male Veterans

54

Female Veterans

War Veterans
Vietnam202
First Gulf War60
Korea58
World War II30
Second Gulf War11

Grinnell Veterans by War

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Age Group Veterans
75+211
65 to 74176
55 to 6484
35 to 5477
18 to 34

Grinnell Veterans by Age

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Name Veterans % of Total
White5428.00%
Asian61.60%

Grinnell Veterans by Race

Grinnell Veterans by Education

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2.20%

Veteran Poverty Rate

25.35%

Veteran Disability Rate

Grinnell Veterans by Education

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64%

Labor Force Participation

61%

Employment Rate

4.7%

Unemployment Rate

Grinnell Employment by Age

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Grinnell Employment by Race

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Grinnell 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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62.65%

Born in Grinnell

95.64%

Native Born

4.36%

Foreign Born

3.54%

Non Citizen

0.82%

Naturalized

Place of Birth

95.64% of Grinnell residents were born in the United States, with 62.65% having been born in Iowa. 3.54% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Grinnell Place of Birth

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
20219,13490.10%
20209,12590.10%
20199,11690.10%
20189,107800.89%
20179,027640.71%
20168,963-55-0.61%
20159,018-45-0.50%
20149,063130.14%
20139,050-56-0.61%
20129,106-95-1.03%
20119,201-21-0.23%
20109,2221170.13%
20009,1052030.23%
19908,902340.04%
19808,8684660.54%
19708,4021,0351.32%
19607,3675390.76%
19506,8281,6182.74%
19405,2102610.52%
19304,949-413-0.80%
19205,3623260.63%
19105,0361,1762.70%
19003,8605281.48%
18903,3320.00%

Grinnell Population by Year