Oak Brook, IL: a village of 8,000, 18% Asian Indian, 190 in our $1M+ set

Oak Brook has about 1,400 residents of Asian Indian descent, up about 30% from about 1,100 in the 2015–2019 survey [1][2]. In a village of about 8,100 people, that is 17.9% of the population [1][3].

That share is higher than in any of the larger DuPage County places in the table below, including Naperville at 14.0% [1][2][4] (our ranking). Our database places 190 people in Oak Brook at an estimated $1M+ [6].

• 1,438 residents of Asian Indian descent (alone or in combination) in Oak Brook, Illinois, 2020–2024 average [1], or 17.9% of the population [3].
• +29.5% versus the 2015–2019 estimate of 1,110 [1][2] (our calculation).
• 190 people in the HeyAlbert database placed in Oak Brook, Illinois at an estimated $1M+, of whom 25 are in our $5M+ bands [6].

How Oak Brook compares with nearby places

The Census Bureau's American Community Survey counts 1,438 people who report Asian Indian ancestry, alone or with another group, in Oak Brook [1], against 1,110 in 2015–2019 [2]. The table compares it with the places in DuPage County that have the largest Asian Indian communities. Figures are for whole places, and some places extend into neighboring counties [1][2][4].

Place	2020–2024	2015–2019	Change	Share of place
Naperville	21,147	17,562	20%	14.0%
Aurora	12,122	9,496	28%	6.7%
Schaumburg	10,156	11,118	-9%	13.2%
Bolingbrook	4,336	4,079	6%	5.9%
Carol Stream	4,275	3,874	10%	10.8%
Bartlett	3,683	3,577	3%	9.1%
Hanover Park	3,521	3,809	-8%	9.6%
Oak Brook	1,438	1,110	30%	17.9%

Asian Indian alone or in any combination. Sources: ACS 5-year estimates [1][2][4]; totals from Table B01003. Change and share are our calculations. Estimates carry margins of error.

Oak Brook's community is small in absolute terms. Naperville has about 21,100 Asian Indian residents, Aurora about 12,100 and Schaumburg about 10,200 [1][2][4]. Bolingbrook and Carol Stream have about 4,300 each [1][2][4]. Carol Stream is 10.8% Asian Indian and Hanover Park 9.6% [1][2][4]. These figures are for whole places, and several of them extend into Cook, Will or Kane counties [1][2][4].

The most concentrated communities

Raw counts favor big cities. Ranking places of 20,000+ residents by the share who report Asian Indian ancestry gives a different map [1][2][3][4][5]:

Place	Asian Indian residents	Total population	Share
Naperville	21,147	150,692	14.0%
Schaumburg	10,156	76,868	13.2%
Carol Stream	4,275	39,460	10.8%
Hanover Park	3,521	36,732	9.6%
Bartlett	3,683	40,501	9.1%
Aurora	12,122	179,898	6.7%
Bolingbrook	4,336	74,096	5.9%

Places with 20,000+ residents and at least 1,000 Asian Indian residents. CDP = census-designated place. Sources: ACS 2020–2024 5-year, Tables B02018 and B01003 [1][2][3][4][5]; shares are our calculation.

What the HeyAlbert database shows in Oak Brook, Illinois

HeyAlbert builds profiles of Indian-American individuals with an estimated net worth of $1M or more from public records, and every estimate is tied to a cited source. Our database currently places 190 such people in Oak Brook, Illinois [6]. That is a count of people we have found and estimated, not a census of wealthy households: our coverage is partial and uneven.

Estimated net-worth band	People in our database
$5M+	25
$1M–5M	165
Total, $1M+	190

Source: HeyAlbert database [6]. Bands are estimates from public evidence; $5M+ combines our $5–15M and $25M+ tiers. Cells under 25 are suppressed.

City	$1M+	of which $5M+
Oak Brook	188	<25

Source: HeyAlbert database [6]. Cities with 25+ people at $1M+; cells under 25 shown as <25. The city is where our sources place the person; for some records it is a workplace rather than a home. Our records are matched on the city name Oak Brook; the Census figures are for the whole place.

Of the 190 people in our Oak Brook set, 165 are in the $1M–5M band and 25 in our $5M+ bands [6]. 188 have Oak Brook in the city table, which leaves out records placed by a workplace or charity address [6]. Seven people in the set have a public giving signal [6].

Why our Oak Brook, Illinois count looks the way it does

Each estimate in our database rests on a primary piece of public evidence. The mix differs from place to place, depending on which records we have been able to process, and it shapes the counts above more than any real difference in wealth does [6].

Primary evidence for the estimate	People	Share
Home value (public assessor or listing records)	162	85%
Other public signals (executive roles, company filings, gifts, pay)	28	15%

Source: HeyAlbert database [6], people at $1M+. Categories under 25 not shown.

Home values support 162 of our 190 estimates and other public signals 28 [6]. Our Oak Brook count is therefore largely a count of homes valued high enough to put a family over $1M in net worth [6].

What it means if you work with these families

For advisors and nonprofits, Oak Brook is a small village with a large Indian-American share and a deep set of $1M+ households in our data [1][3][6]. Our DuPage County post and our Naperville and Hinsdale posts show the neighboring communities.

Methodology

Census figures are American Community Survey 5-year estimates for 2020–2024 and 2015–2019, Table B02018, using “Asian Indian, alone or in any combination” [1][2]. Total population comes from Table B01003 [3]. The Census Bureau changed how it codes detailed race responses in 2020, so part of the change between the two periods may reflect coding rather than migration. All estimates carry margins of error. Shares and growth rates are our calculations.

HeyAlbert counts are aggregates from our database as of October 31, 2026 [6]. They include people we identified as likely of Indian origin with an estimated net worth of $1M or more, based on public records such as property assessments, professional licenses, patents, SEC filings and donor rolls. Coverage is partial and depends on which public records exist and which we have processed. These counts are not population totals. Any cell under 25 is suppressed, and we publish aggregates only, never individual records.

Related

• Indian-American wealth in DuPage County: Naperville's community, Oak Brook's wealth
• Naperville, IL: 21,000 residents of Indian descent, 118 in our $1M+ set
• Hinsdale, IL: about 900 Asian Indian residents, 106 people in our set
• Indian-American wealth in Illinois: suburbs grow, the top tier stays in Chicago

HeyAlbert finds Indian-American families worth $1M+ and tells you who to call, with every fact cited. See who is in Oak Brook, Illinois at heyalbert.site.

Sources

1. ACS 2020–2024 5-year estimates, Table B02018, places in Illinois. US Census Bureau. https://data.census.gov/table/ACSDT5Y2024.B02018?g=040XX00US17$1600000 (data: machine-readable)
2. ACS 2015–2019 5-year estimates, Table B02018, places in Illinois. US Census Bureau. https://data.census.gov/table/ACSDT5Y2019.B02018?g=040XX00US17$1600000 (data: machine-readable)
3. ACS 2020–2024 5-year estimates, Table B01003 (total population), places in Illinois. US Census Bureau. https://data.census.gov/table/ACSDT5Y2024.B01003?g=040XX00US17$1600000 (data: machine-readable)
4. ACS 2020–2024 5-year estimates, Table B02018, places in DuPage County, Illinois. US Census Bureau. https://data.census.gov/table/ACSDT5Y2024.B02018?g=050XX00US17043$1600000 (data: machine-readable)
5. ACS 2020–2024 5-year estimates, Table B01003, places in DuPage County, Illinois. US Census Bureau. https://data.census.gov/table/ACSDT5Y2024.B01003?g=050XX00US17043$1600000 (data: machine-readable)
6. HeyAlbert database, aggregate counts (snapshot as of October 31, 2026); how we build it is described on our methodology page. HeyAlbert. https://heyalbert.site/research/methodology/