zipradar

County · IL

Cook County, IL

ZIP-level federated summaries inside Cook County, Illinois. zipradar pulls property tax (county assessor), deeds (county recorder), water quality (EPA SDWIS), flood zones (FEMA NFHL), schools (NCES CCD), and crime (FBI UCR) at the county and ZIP level.

Last verified 2026-06-10 · methodology

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Geographic distribution of 5 live ZIP codes in Cook County, IL.

5 ZIP codes live in Cook County

Browse Cook County by topic

Illinois top concern

Lead service lines, flooding (Mississippi/Illinois)

Illinois has the highest LCRR lead-service-line replacement obligations in the US (Chicago alone >400,000 LSLs). FEMA AE coverage extends along the Mississippi, Illinois, and Rock rivers. EPA SDWIS shows urban vs. downstate disparity.

See Illinois state page for the full state-level rollup, plus all Illinois counties.

Frequently asked questions

How many ZIP codes does zipradar cover in Cook County, IL?

5 ZIP codes are live in Cook County, Illinois today. Each ZIP page federates property tax (Cook County assessor), deeds (Cook County recorder), drinking water (EPA SDWIS), flood (FEMA NFHL), schools (NCES CCD), and crime (FBI UCR).

What data sources does zipradar use for Cook County County?

Property tax + assessed values come from the Cook County County Assessor's office. Deed activity comes from the Cook County County Recorder. Zoning is sourced from county planning records. State-level overlays: EPA SDWIS (water), FEMA NFHL (flood), FBI UCR (crime), NCES CCD (schools), EPA Map of Radon Zones. Refresh cadence varies — see /methodology.

How are property tax and deeds different in Cook County?

Property tax records are maintained by the Cook County County Assessor (annual cycle, typically). Deeds are recorded by the Cook County County Recorder (real-time on transaction). zipradar surfaces both at the ZIP level so you can spot assessment-vs-sale-price gaps and recent deed activity. See /learn for the full office-distinction explainer.

Does Cook County have flood or wildfire risk?

Flood risk is mapped at the ZIP and parcel level via FEMA NFHL (National Flood Hazard Layer). Wildfire risk uses USFS Wildfire Risk to Communities data. Browse the per-ZIP pages above for Cook County-specific exposure scores — each cites the FEMA flood-zone code (A, AE, X, etc.) or USFS risk percentile.

Read more on county-level data

How property tax, deeds, zoning, and schools work at the county level — the office distinctions, what data lags, and what each record actually means.