Buffalo Grove, Illinois Population 2020

40,213
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Buffalo Grove is a city located in Illinois. With a 2020 population of 40,213, it is the 40th largest city in Illinois and the 970th largest city in the United States. Buffalo Grove is currently declining at a rate of -0.69% annually and its population has decreased by -3.09% 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 4,239 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. For every 100 females there are 94.0 males.

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 40,213, 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 2020

Population by Race

Race Population Percentage
White29,64072.18%
Asian8,64321.05%
Two or More Races1,1552.81%
Some Other Race8502.07%
Black or African American6641.62%
American Indian and Alaska Native870.21%
Native Hawaiian and Other Pacific Islander230.06%
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Buffalo Grove Population by Race

Buffalo Grove Population Pyramid 2020

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Buffalo Grove Median Age

41.7


Total

40.8


Male

42.4


Female

Buffalo Grove Adults

There are 31,619 adults, (5,952 of whom are seniors) in Buffalo Grove.

Buffalo Grove Age Dependency

60

Age Dependency Ratio

23.2

Old Age Dependency Ratio

36.8

Child Dependency Ratio

Buffalo Grove Sex Ratio

Female

21,164

51.54%

Male

19,898

48.46%

Buffalo Grove Population by Age

Buffalo Grove Renter vs Owner Occupied by Household Type

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Buffalo Grove Household Types

Type Owner Renter
Married84.4%15.6%
All79.8%20.2%
Non Family71.7%28.3%
Female69.2%30.8%
Male68.4%31.6%

79.8%

Rate of Home Ownership

Buffalo Grove Households and Families

Type Count Average Size Owned
All15,3992.6679.8
Married10,1543.2184.4
Non Family3,9181.1171.7
Female9383.0869.2
Male3892.8268.4

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 Grade3201.10%
9th to 12th Grade3621.24%
High School Graduate3,22011.07%
Some College4,12414.17%
Associates Degree1,8386.32%
Bachelors Degree11,08838.11%
Graduate Degree8,14527.99%
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Buffalo Grove Educational Attainment by Sex (over 25)

Buffalo Grove Educational Attainment by Race

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Name Total High School Bachelors
White20,78720,48213,182
Asian5,8735,7275,000
Hispanic1,6301,401556
Other Race616531179
Black433431252
Multiple Races387387210
Native American38298
Islander232323

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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Name Average Male Female
Overall$64,817$82,236$53,168
Less Than High School$27,500$28,507$21,992
High School Grad$36,748$42,735$29,323
Some College$47,060$51,525$38,705
Bachelors Degree$67,770$85,145$52,214
Graduate Degree$101,088$118,059$83,395

$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
White27,7641,0663.84%
Asian8,6431822.11%
Hispanic2,780873.13%
Multiple1,155292.51%
Other850131.53%
Black655111.68%

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

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Name Poverty
Some College5.53%
High School5.07%
Less Than High School3.77%
Bachelors or Greater2.78%

Buffalo Grove Poverty Rate by Education

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Name Poverty
Male Unemployed16.80%
Female Unemployed11.11%
Female Employed1.77%
Male Employed1.19%

Buffalo Grove Poverty Rate by Employment Status and Sex

Buffalo Grove Income by Household Type

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Name Median Mean
Households$115,951$140,449
Families$136,150$162,164
Married Families$145,762-
Non Families$54,812$72,478
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Income by Household Type

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

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1,071

Number of Veterans

1,010

Male Veterans

61

Female Veterans

War Veterans
Vietnam286
First Gulf War237
Korea194
Second Gulf War129
World War II80

Buffalo Grove Veterans by War

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Age Group Veterans
75+432
35 to 54279
65 to 74233
18 to 3475
55 to 6452

Buffalo Grove Veterans by Age

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Name Veterans % of Total
White9614.05%
2 or More4610.43%
Hispanic372.07%
Asian340.55%
Black183.44%
Other121.81%

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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52.64%

Born in Illinois

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
202040,213-281-0.69%
201940,494-281-0.69%
201840,775-372-0.90%
201741,147-234-0.57%
201641,381-118-0.28%
201541,499-201-0.48%
201441,700-45-0.11%
201341,745830.20%
201241,66270.02%
201141,6551190.29%
201041,536-1,373-0.32%
200042,9096,4821.65%
199036,42714,1975.06%
198022,2309,8976.07%
197012,33310,83323.45%
19601,5000.00%

Buffalo Grove Population by Year