Buffalo Grove, Illinois Population 2020

40,387

Buffalo Grove is a city located in Cook County, Illinois. With a 2020 population of 40,387, it is the 40th largest city in Illinois and the 972nd largest city in the United States. Buffalo Grove is currently declining at a rate of -0.57% annually and its population has decreased by -2.67% 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 4,258 people per square mile.

The average household income in Buffalo Grove is $139,396 with a poverty rate of 4.39%. The median rental costs in recent years comes to $1,599 per month, and the median house value is $324,600. The median age in Buffalo Grove is 41.9 years, 40.5 years for males, and 43 years for females. For every 100 females there are 95.5 males.

Buffalo Grove Il Demographics

According to the most recent ACS, the racial composition of Buffalo Grove Il was:

  • White: 71.39%
  • Asian: 21.67%
  • Black or African American: 2.39%
  • Other race: 2.23%
  • Two or more races: 1.97%
  • Native American: 0.31%
  • Native Hawaiian or Pacific Islander: 0.04%
The current population of Buffalo Grove, Illinois is 40,387, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 40,853. The last official US Census in 2010 recorded the population at 41,496.

Population by Race

Race Population Percentage
White29,50671.39%
Asian8,95521.67%
Black or African American9862.39%
Some Other Race9222.23%
Two or More Races8151.97%
American Indian and Alaska Native1290.31%
Native Hawaiian and Other Pacific Islander160.04%

Buffalo Grove Il Population Pyramid 2020

Buffalo Grove Il Median Age

41.9


Total

40.5


Male

43


Female

Buffalo Grove Il Adults

There are 31,998 adults, (6,088 of whom are seniors) in Buffalo Grove Il.

Buffalo Grove Il Age Dependency

59.5

Age Dependency Ratio

23.5

Old Age Dependency Ratio

36

Child Dependency Ratio

Buffalo Grove Il Sex Ratio

Female

21,135

51.14%

Male

20,194

48.86%

Buffalo Grove Il Households and Families

Buffalo Grove Il Renter vs Owner Occupied by Household Type

Buffalo Grove Il Household Types

Type Owner Renter
Married84.1%15.9%
All79.2%20.8%
Non Family71.5%28.5%
Male67.1%32.9%
Female66.4%33.6%

79.2%

Rate of Home Ownership

Type Count Average Size Owned
All15,5802.6479.2
Married10,1063.284.1
Non Family4,0321.1371.5
Female1,0143.1266.4
Male4282.7867.1

3.13

Average Family Size

2.64

Average Household Size

3.4%

Unmarried (Opposite Sex)

0%

Unmarried (Same Sex)

Buffalo Grove Il Education

Education Attained Count Percentage
Less Than 9th Grade3651.24%
9th to 12th Grade3841.30%
High School Graduate3,13310.61%
Some College4,06713.77%
Associates Degree1,9416.57%
Bachelors Degree11,06237.46%
Graduate Degree8,58029.05%

Buffalo Grove Il Educational Attainment by Race

Name Total High School Bachelors
White21,29820,92813,453
Asian6,0065,8595,102
Hispanic1,4011,170502
Other Race656519197
Black622621405
Multiple Races220220155
Native American513611
Islander161616

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%.

Name Average Male Female
Overall$64,545$79,836$53,369
Less Than High School$20,774$30,635$14,808
High School Grad$35,685$42,407$28,785
Some College$43,036$46,806$39,970
Bachelors Degree$66,842$80,625$51,455
Graduate Degree$96,723$111,016$81,980

$64,545

Average Earnings

$79,836

Average Male

$53,369

Average Female

Buffalo Grove Il Language

Buffalo Grove Il Language by Age

Buffalo Grove Il Language

59.33% of Buffalo Grove Il residents speak only English, while 40.67% 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 Il Poverty

Buffalo Grove Il Poverty by Race

Name Total In Poverty Poverty Rate
White28,2621,2394.38%
Asian8,9554474.99%
Hispanic2,252492.18%
Multiple815435.28%
Black978323.27%
Other922161.74%

4.39%

Overall Poverty Rate

4.40%

Male Poverty Rate

4.39%

Female Poverty Rate

Poverty in Buffalo Grove Il

The race most likely to be in poverty in Buffalo Grove Il is Multiple, with 5.28% below the poverty level.

The race least likely to be in poverty in Buffalo Grove Il is Other, with 1.74% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.81%. Among those working part-time, it was 5.65%, and for those that did not work, the poverty rate was 11.21%.

Name Poverty
Some College7.84%
High School7.50%
Less Than High School3.41%
Bachelors or Greater2.99%
Name Poverty
Male Unemployed31.95%
Female Unemployed20.37%
Female Employed1.85%
Male Employed1.78%

Buffalo Grove Il Income

Buffalo Grove Il Income by Household Type

Name Median Mean
Households$111,435$139,396
Families$132,302$161,405
Married Families$145,075-
Non Families$55,984$72,124

Buffalo Grove Il Marital Status

Buffalo Grove Il Marital Status

Marriage Rates

63.5%

Overall Marriage Rate

66.5%

Male Marriage Rate

60.8%

Female Marriage Rate

Buffalo Grove Il Married by Age and Sex

Buffalo Grove Il 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 Il Marital Status by Race

Buffalo Grove Il Veterans

1,129

Number of Veterans

1,085

Male Veterans

44

Female Veterans

War Veterans
Vietnam339
Korea205
First Gulf War184
Second Gulf War136
World War II124
Name Veterans % of Total
White1,0014.21%
Asian620.97%
Hispanic332.12%
Black273.52%
2 or More269.56%
Other131.80%

$Buffalo Grove Il Veterans by Education

4.11%

Veteran Poverty Rate

26.76%

Veteran Disability Rate

Buffalo Grove Il Employment Status

71.5%

Labor Force Participation

68.5%

Employment Rate

4.2%

Unemployment Rate

Buffalo Grove Il Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

50.46%

Born in Illinois

66.26%

Native Born

33.74%

Foreign Born

15.29%

Non Citizen

Place of Birth

66.26% of Buffalo Grove Il residents were born in the United States, with 50.46% having been born in Illinois. 15.29% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Year Population Growth Annual Growth Rate
202040,387-233-0.57%
201940,620-233-0.57%
201840,853-333-0.81%
201741,186-233-0.56%
201641,419-113-0.27%
201541,532-194-0.46%
201441,726-38-0.09%
201341,764910.22%
201241,673130.03%
201141,6601200.29%
201041,540-1,369-0.32%
200042,9096,4821.65%
199036,42714,1975.06%
198022,2309,8976.07%
197012,33310,83323.45%
19601,5000.00%