State
County
Land Area (mi²)
9.5 sq mi
Density (mi²)
4,209.80/sq mi
2020 Growth Rate
-0.70%
Growth Since 2010
-3.77%
Rank in State
Rank in Country
World Population Review
Buffalo Grove, Illinois Population 2021
39,932
Buffalo Grove is a city located in Lake County Illinois. With a 2020 population of 39,932, it is the 41st largest city in Illinois and the 984th largest city in the United States . Buffalo Grove is currently declining at a rate of -0.70% annually and its population has decreased by -3.77% since the most recent census, which recorded a population of 41,496 in 2010. Buffalo Grove reached it's highest population of 42,909 in 2000. Spanning over 10 miles, Buffalo Grove has a population density of 4,210 people per square mile.
The average household income in Buffalo Grove is $140,449 with a poverty rate of 3.36%. The median rental costs in recent years comes to $1,643 per month, and the median house value is $332,300. The median age in Buffalo Grove is 41.7 years, 40.8 years for males, and 42.4 years for females.
Buffalo Grove Demographics
According to the most recent ACS, the racial composition of Buffalo Grove was:
- White: 72.18%
- Asian: 21.05%
- Two or more races: 2.81%
- Other race: 2.07%
- Black or African American: 1.62%
- Native American: 0.21%
- Native Hawaiian or Pacific Islander: 0.06%
The current population of Buffalo Grove, Illinois is 39,932 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 40,775.The last official US Census in 2010 recorded the population at 41,496.
Buffalo Grove, Illinois Population 2021
| Race | Population | Percentage |
|---|---|---|
| White | 29,640 | 72.18% |
| Asian | 8,643 | 21.05% |
| Two or More Races | 1,155 | 2.81% |
| Some Other Race | 850 | 2.07% |
| Black or African American | 664 | 1.62% |
| American Indian and Alaska Native | 87 | 0.21% |
| Native Hawaiian and Other Pacific Islander | 23 | 0.06% |
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Buffalo Grove Population by Race
Buffalo Grove Population Pyramid $2021
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Buffalo Grove Population by Age
Buffalo Grove Households and Families
| Type | Count | Average Size | Owned |
|---|---|---|---|
| All | 15,399 | 2.66 | 79.8 |
| Married | 10,154 | 3.21 | 84.4 |
| Non Family | 3,918 | 1.11 | 71.7 |
| Female | 938 | 3.08 | 69.2 |
| Male | 389 | 2.82 | 68.4 |
3.15
Average Family Size
2.66
Average Household Size
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Buffalo Grove Households by Type
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| Education Attained | Count | Percentage |
|---|---|---|
| Less Than 9th Grade | 320 | 1.10% |
| 9th to 12th Grade | 362 | 1.24% |
| High School Graduate | 3,220 | 11.07% |
| Some College | 4,124 | 14.17% |
| Associates Degree | 1,838 | 6.32% |
| Bachelors Degree | 11,088 | 38.11% |
| Graduate Degree | 8,145 | 27.99% |
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Buffalo Grove Educational Attainment by Sex (over 25)
Buffalo Grove Educational Attainment by Race
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| Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 20,787 | 20,482 | 13,182 |
| Asian | 5,873 | 5,727 | 5,000 |
| Hispanic | 1,630 | 1,401 | 556 |
| Other Race | 616 | 531 | 179 |
| Black | 433 | 431 | 252 |
| 2+ Races | 387 | 387 | 210 |
| Native American | 38 | 29 | 8 |
| Islander | 23 | 23 | 23 |
The highest rate of high school graduation is among islander people with a rate of 100.00%.
The highest rate of bachelors degrees is among islander people with a rate of 100.00%.
Buffalo Grove Educational Attainment by Race
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$64,817
Average Earnings
$82,236
Average Male
$53,168
Average Female
Buffalo Grove Earnings by Educational Attainment
Buffalo Grove Language by Age
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Buffalo Grove Language
58.39% of Buffalo Grove residents speak only English, while 41.61% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 20.42% of the population.
Buffalo Grove Language
Buffalo Grove Poverty by Race
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| Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 27,764 | 1,066 | 3.84% |
| Asian | 8,643 | 182 | 2.11% |
| Hispanic | 2,780 | 87 | 3.13% |
| Multiple | 1,155 | 29 | 2.51% |
| Other | 850 | 13 | 1.53% |
| Black | 655 | 11 | 1.68% |
3.36%
Overall Poverty Rate
3.28%
Male Poverty Rate
3.43%
Female Poverty Rate
Poverty in Buffalo Grove
The race most likely to be in poverty in Buffalo Grove is White, with 3.84% below the poverty level.
The race least likely to be in poverty in Buffalo Grove is Other, with 1.53% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 1.08%. Among those working part-time, it was 3.04%, and for those that did not work, the poverty rate was 10.02%.
Buffalo Grove Poverty
Buffalo Grove Poverty Rate by Education
Buffalo Grove Marital Status
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Marriage Rates
64.4%
Overall Marriage Rate
67.1%
Male Marriage Rate
61.8%
Female Marriage Rate
Buffalo Grove Married by Age and Sex
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Buffalo Grove Marriage
The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 35-44.
Buffalo Grove Marital Status by Race
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Buffalo Grove Marital Status
Buffalo Grove Veterans by War
Buffalo Grove Veterans by Age
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| Name | Veterans | % of Total |
|---|---|---|
| White | 961 | 4.05% |
| 2+ Races | 46 | 10.43% |
| Hispanic | 37 | 2.07% |
| Asian | 34 | 0.55% |
| Black | 18 | 3.44% |
| Other Race | 12 | 1.81% |
Buffalo Grove Veterans by Race
Buffalo Grove Veterans by Education
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3.67%
Veteran Poverty Rate
27.15%
Veteran Disability Rate
Buffalo Grove Veterans by Education
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72.5%
Labor Force Participation
69.9%
Employment Rate
3.5%
Unemployment Rate
Buffalo Grove Employment by Age
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Buffalo Grove Employment by Race
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Buffalo Grove 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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67.13%
Native Born
32.87%
Foreign Born
14.68%
Non Citizen
18.19%
Naturalized
Place of Birth
67.13% of Buffalo Grove residents were born in the United States, with 52.64% having been born in Illinois. 14.68% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.
Buffalo Grove Place of Birth
| Year | Population | Growth | Annual Growth Rate |
|---|---|---|---|
| 2021 | 39,932 | -281 | -0.70% |
| 2020 | 40,213 | -281 | -0.69% |
| 2019 | 40,494 | -281 | -0.69% |
| 2018 | 40,775 | -372 | -0.90% |
| 2017 | 41,147 | -234 | -0.57% |
| 2016 | 41,381 | -118 | -0.28% |
| 2015 | 41,499 | -201 | -0.48% |
| 2014 | 41,700 | -45 | -0.11% |
| 2013 | 41,745 | 83 | 0.20% |
| 2012 | 41,662 | 7 | 0.02% |
| 2011 | 41,655 | 119 | 0.29% |
| 2010 | 41,536 | -1,373 | -0.32% |
| 2000 | 42,909 | 6,482 | 1.65% |
| 1990 | 36,427 | 14,197 | 5.06% |
| 1980 | 22,230 | 9,897 | 6.07% |
| 1970 | 12,333 | 10,833 | 23.45% |
| 1960 | 1,500 | 0.00% |