Where does this demographic data come from?

All demographic data comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates, which samples about 3.5 million households annually. The 5-year estimates provide the most reliable data for small geographies like municipalities.

What is the difference between Census data and ACS data?

The decennial Census (conducted every 10 years) is a full population count focusing on basic demographics. The ACS is an ongoing survey that collects detailed data on income, education, housing, commute patterns, and more. ACS data is updated annually but represents averages over a 5-year period.

How accurate is this data for small towns?

For smaller municipalities, ACS estimates have wider margins of error because fewer residents are sampled. The 5-year estimates reduce this uncertainty by averaging over a longer period. For towns under 5,000 people, treat specific numbers as approximations rather than precise counts.

Northbrook, IL Population, Income & Demographics 2026

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Demographics — 2024 ACS 5-Year Estimatesi

Census

Populationi

34,585

Median Agei

49.6

Race & Ethnicityi

White

73.8%25,521

Asian

16.2%5,594

Hispanic/Latino

5.4%1,868

Two or More

2.7%925

Black

1.8%626

Other

0.1%45

American Indian/Alaska Native

0%6

Educational Attainment (Age 25+)i

GED/Alternative

0.8%206

High School Diploma

9.3%2,379

Some College (<1 yr)

2.5%649

Some College (1+ yr)

8.1%2,054

Associate's Degree

3.8%969

Bachelor's Degree

33.3%8,493

Master's Degree

26%6,619

Professional Degree

9.1%2,311

Doctorate

4.2%1,081

HS or Higher

97.2%

BA or Higher

72.6%

Graduate+

39.3%

Housingi

Median Home Valuei

$652,300

Median Renti

$2,463

Tenure

Owner-Occupied

87.2%11,604

Renter-Occupied

12.8%1,698

Total Units

14,435

Homeownership

87.2%

Vacancy Rate

7.8%

Economyi

Median Household Incomei

$157,782

Mean Household Incomei

$222,214

Per Capita Incomei

$87,173

Poverty Ratei

4.3%

Unemploymenti

3.2%

Labor Forcei

16,767

Household Income Distribution

Under $10K

3.7%491

$10K–$15K

0.8%100

$15K–$20K

1%134

$20K–$25K

1.7%221

$25K–$30K

1.9%247

$30K–$35K

1.6%218

$35K–$40K

1.8%239

$40K–$45K

0.9%122

$45K–$50K

1.1%151

$50K–$60K

4.2%554

$60K–$75K

5.2%698

$75K–$100K

8.6%1,145

$100K–$125K

8.2%1,089

$125K–$150K

8.3%1,109

$150K–$200K

10.1%1,338

$200K+

40.9%5,446

Federally Subsidized Housingi

HUD

The federal government helps low-income families, seniors, and people with disabilities afford housing through several programs. Residents typically pay about 30% of their income toward rent, with the government covering the rest. This data shows how many households in this community receive that assistance.

Subsidized Homesi

Residentsi

Avg. Tenant Renti

$558/mo

Programs in this community

Housing Choice Vouchers19 homes93% occupied$558/mo rent

Rental vouchers (Section 8) that help tenants pay for private-market housing

Project Based Section 81 homes

Privately owned apartments with rent subsidies tied to the building

Household Incomei

Based on area median of $157,782/yr

Extremely low incomeUnder $47K/yr

83%

Very low income$47K–$79K/yr

17%

Who Receives This Housing

78% of subsidized households are headed by a single mother

39% of subsidized households are minority

26% of subsidized households include someone with a disability

56% of subsidized households include a senior (62+)

Ancestry & Heritage

Self-reported ancestry groups. Residents may report multiple ancestries, so totals may exceed 100%.

Social Characteristicsi

Marital Status (15+)i

Veteransi

1,022(3.7% of civilian adults)