Area Code 773

Illinois (IL) • Chicago, Harwood Heights, Riverdale • Central Time (CT)

What Stands Out

•Coverage: 2.4M people across 42 ZIP codes (primarily Cook County, IL).
•Overlapping area codes: 872.
•Major cities: Chicago, Harwood Heights, Riverdale.

Spotlight: Coverage

Snapshot highlights for area code 773.

Income

53rd

Home values

72nd

Poverty rate

77th

Area Code Basics

Primary State

Illinois (IL)

States Served

Illinois (IL)

Major Cities

Chicago, Harwood Heights, Riverdale

Time Zone(s)

Central Time (CT)

Est. Population

2.4M

ZIP Codes

Data accuracy & methodology

This report aggregates 2020–2024 ACS 5-year estimates and geographic overlays for orientation. Area-code service areas can cross ZIP/state boundaries and change over time; verify official assignments with NANPA for critical use.