Sources & methods
Every value should survive a source check
This catalog records the agency, reference period, access date, cadence, and geographic limits behind the July 9 snapshot.
Official source catalog
40 primary sources
40 sources match your search.
DuPage County GIS
Official membership source for incorporated municipalities touching DuPage County. The Uninc feature is excluded.
- Reference period
- Current county boundary catalog
- Accessed
- July 9, 2026
- Topics
- compare
Cook County Government
Official membership source for incorporated municipalities touching Cook County.
- Reference period
- Current county municipality catalog
- Accessed
- July 9, 2026
- Topics
- compare
U.S. Census Bureau
Census place FIPS, legal names, and legal types used to reconcile the two county membership catalogs.
- Reference period
- 2024 incorporated-place geography
- Accessed
- July 9, 2026
- Topics
- compare
U.S. Census Bureau
Comparable place-level demographic, workforce, and housing estimates with margins of error and source suppression retained.
- Reference period
- 2020–2024
- Accessed
- July 9, 2026
- Topics
- censusjobshousingcompare
U.S. Census Bureau
Latest annual whole-place population estimates available for the snapshot.
- Reference period
- July 1, 2025
- Accessed
- July 9, 2026
- Topics
- censuscompare
U.S. Census Bureau
Official whole-place population counts used separately from ACS estimates.
- Reference period
- April 1, 2020
- Accessed
- July 9, 2026
- Topics
- censuscompare
U.S. Census Bureau
Workplace jobs and commuting flows aggregated to whole incorporated-place boundaries.
- Reference period
- 2023
- Accessed
- July 9, 2026
- Topics
- jobscompare
U.S. Census Bureau
Place-level establishments, employment, payroll, retail activity, and sector measures; source disclosure flags are retained.
- Reference period
- Reference year 2022
- Accessed
- July 9, 2026
- Topics
- jobsbusinesscompare
Federal Bureau of Investigation
Violent plus property offense counts and FBI agency populations. Only city agencies with 12 complete reporting months are ranked.
- Reference period
- Calendar year 2024
- Accessed
- July 9, 2026
- Topics
- crimecompare
U.S. Census Bureau
Official elementary, secondary, and unified district boundaries used for reviewed municipality-to-district mappings.
- Reference period
- 2025 boundaries
- Accessed
- July 9, 2026
- Topics
- schoolscompare
National Center for Education Statistics
Official LEA identifiers used to join 2025 TIGER school boundaries to Illinois RCDTS district records.
- Reference period
- School year 2024–25
- Accessed
- July 9, 2026
- Topics
- schoolscompare
Illinois Office of the Comptroller
FY2024 bulk Access data for completed municipal AFR revenue, expenditure, debt, staffing, population, and assessed valuation. Missing filings remain missing.
- Reference period
- Fiscal year 2024
- Accessed
- July 9, 2026
- Topics
- fiscalcompare
U.S. Census Bureau
Comparable place-level demographic, economic, and housing estimates. QuickFacts republishes the latest ACS 5-year values and population estimates.
- Reference period
- 2020–2024; population estimates through 2025
- Accessed
- July 9, 2026
- Topics
- overviewcensusjobshousingbusinesscompare
Chicago Metropolitan Agency for Planning
Vetted municipal profile covering ACS benchmarks, 2025 employment and retail sales, 2024 assessed value, 2023 land use and VMT, and explicitly historical 2008–2018 water-demand data.
- Reference period
- Release June 2026; underlying periods vary by table
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 0674c3bfa9c0b637… · 357,459 bytes
- Topics
- overviewcensusmobilityinfrastructurejobshousingbusinessfiscal
Oak Brook Park District
Official facility page reporting six Park District parks and 173 acres of Park District land.
- Reference period
- Current as accessed July 9, 2026
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 7b138ea474483ec2… · 106,485 bytes
- Topics
- overviewcommunity
Oak Brook Park District
Park District operations report with recreation-center visits, Winter Lights attendance, membership revenue, and the published revenue mix.
- Reference period
- Fiscal year 2024/25
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 dc8dc5d073a3da8c… · 20,417,474 bytes
- Topics
- community
American Academy for Park and Recreation Administration
Independent award announcement naming Oak Brook Park District the Class V Grand Plaque recipient.
- Reference period
- September 2025
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 ae3fe93f17196cb9… · 288,310 bytes
- Topics
- community
National Recreation and Park Association
Independent accreditation catalog listing Oak Brook Park District, its first accreditation, and next review.
- Reference period
- Current listing accessed July 9, 2026
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 8430d18fa15f1314… · 316,484 bytes
- Topics
- community
Village of Oak Brook Public Library
Official current operating hours, including the seasonal Sunday schedule.
- Reference period
- Current as accessed July 9, 2026
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 c594dd26f87925ae… · 996,105 bytes
- Topics
- community
Village of Oak Brook Public Library
Official fine-free, standard loan-period, and automatic-renewal rules.
- Reference period
- Current policy accessed July 9, 2026
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 a1de737fe626322d… · 939,772 bytes
- Topics
- community
Village of Oak Brook
Village-maintained street and pathway mileage, parkway-tree inventory and pruning cycle, snow goal, and storm-inlet cleaning cycles.
- Reference period
- Current service descriptions accessed July 9, 2026
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 1847714cd23eaaa8… · 958,391 bytes
- Topics
- mobilityinfrastructure
Village of Oak Brook
Adopted planning document with future network, crossing, phasing, and implementation recommendations.
- Reference period
- March 2025 master plan
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 2ac70af0d317412e… · 23,166,074 bytes
- Topics
- mobility
Pace Suburban Bus
Current route description and CTA Blue Line, Metra UP-West, and Oakbrook Center connections.
- Reference period
- Current service accessed July 9, 2026
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 43b87f72f405ed64… · 83,429 bytes
- Topics
- mobility
Pace Suburban Bus
Current daily route between CTA Pink Line 54th/Cermak and Yorktown Center via Oakbrook Center.
- Reference period
- Current service accessed July 9, 2026
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 e96719e5cf0c8299… · 81,374 bytes
- Topics
- mobility
Pace Suburban Bus
Current weekday Oakbrook Center service and CTA Blue Line / Metra connections.
- Reference period
- Current service accessed July 9, 2026
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 aff992615d3bf8eb… · 85,144 bytes
- Topics
- mobility
Pace Suburban Bus
Planned—not current—Pulse service concept, potential station locations, and stated 2031 launch goal.
- Reference period
- Preliminary planning and environmental review as of July 9, 2026
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 b9d6bf5442d39040… · 100,652 bytes
- Topics
- mobility
Pace Suburban Bus
Planned—not current—express-bus alignment, station, phasing, and implementation recommendations.
- Reference period
- Final study published January 2026
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 c6465ab008487d5c… · 38,300,873 bytes
- Topics
- mobility
Village of Oak Brook
Detected regulated substances, lead and copper sampling, emergency supply information, and the report's separate compliance disclosure.
- Reference period
- Reporting year 2025; individual sample years shown by substance
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 fbfd032c45eeef0f… · 1,318,894 bytes
- Topics
- infrastructure
Village of Oak Brook Fire Department
Current department mission, staffing roster, dispatch, and contact information.
- Reference period
- Current as accessed July 9, 2026
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 e331f71a876e271d… · 949,711 bytes
- Topics
- crime
Village of Oak Brook Fire Department
Interactive incident and response dashboard; unstable iframe values are linked but not copied into the static snapshot.
- Reference period
- Live dashboard
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 6af7a448557d519a… · 968,961 bytes
- Topics
- crime
Village of Oak Brook Police Department
Calls for service, NIBRS Group A offenses, investigations, arrest charges, and five-year offense counts reported by the department.
- Reference period
- Calendar year 2024
- Accessed
- July 9, 2026
- Topics
- overviewcrime
Village of Oak Brook
Village year-in-review communication reporting the five-year residential burglary series and a 4:50 average ambulance response benchmark.
- Reference period
- 2021–2025 burglary series; ambulance benchmark reported January 2026
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 4e242f739bac29f5… · 19,039,170 bytes
- Topics
- overviewcrime
Illinois Department of Employment Security
Not seasonally adjusted LAUS estimates for counties and qualifying municipalities. Oak Brook is below the population threshold for a municipal LAUS series.
- Reference period
- March 2026
- Accessed
- July 9, 2026
- Topics
- overviewjobs
Federal Deposit Insurance Corporation
Branch office deposits reported by FDIC-insured institutions. Dollar values in the source are thousands of dollars and may be amended by filers.
- Reference period
- June 30, 2025
- Accessed
- July 9, 2026
- Topics
- overviewbanking
U.S. Census Bureau
Employer establishments, March employment, and annual payroll for ZIP Code 60523. ZIP geography is not coterminous with the Village of Oak Brook.
- Reference period
- Reference year 2023
- Accessed
- July 9, 2026
- Topics
- overviewjobsbusiness
U.S. Census Bureau
Employer Identification Number applications at the county level. The June 2026 release uses disclosure-avoidance noise described by Census.
- Reference period
- Calendar year 2025
- Accessed
- July 9, 2026
- Topics
- overviewbusiness
Illinois State Board of Education
District enrollment, assessment proficiency, graduation, staffing, attendance, and spending. Asterisks in the source denote suppression.
- Reference period
- School year 2024–25 / 2025 report card
- Accessed
- July 9, 2026
- Topics
- overviewschoolscompare
Village of Oak Brook
Adopted revenue, expenditure, fund, pension, and capital-plan information in the Village's digital budget book.
- Reference period
- Fiscal year 2026
- Accessed
- July 9, 2026
- Topics
- overviewfiscal
Village of Oak Brook
Official list of school districts serving Oak Brook and published local tax facts.
- Reference period
- Current as accessed July 9, 2026
- Accessed
- July 9, 2026
- Snapshot file
- SHA-256 c521ed4bc528ff58… · 951,181 bytes
- Topics
- overviewcrimemobilityschoolsfiscal
Federal Bureau of Investigation
National UCR/NIBRS access point used for definitions and reporting-quality context; no unverified peer values are reproduced in this snapshot.
- Reference period
- Varies by agency and release
- Accessed
- July 9, 2026
- Topics
- crimecompare
Methodology
How the snapshot is assembled
A Census incorporated-place geography. Oak Brook village values use FIPS place 54534 and do not automatically describe nearby ZIP areas.
A postal geography used here for Business Patterns. It overlaps Oak Brook but is not a municipal boundary.
The time represented by a value—not the date this dashboard accessed or published it. Every metric carries its own period.
A transparent calculation from cited official values, identified with a Derived label and a formula description.
An official limit used to protect confidentiality or cap publication. Suppressed data remain absent; capped values retain a plus sign.
A warning that geography, exposure, definition, or reporting coverage limits a direct comparison.
The population published for an FBI reporting agency. Crime comparison rates use this denominator and require 12 complete reporting months.
A positive intersection of at least one acre between a 2025 municipality polygon and an elementary, secondary, or unified district boundary, subject to reviewed exceptions.
Recognition, current service, historical indicator, and planned project are stored as distinct statuses. Planned projects are never counted as current service.
This project is independent and is not an official Village product. Source agencies may revise their data after this snapshot date; use the linked source for the current official record.