Chicago COVID-19 Vaccination Coverage by ZIP Code and Age Group

Chicago residents up to date with COVID-19 vaccines, aggregated by ZIP code and age group. Weekly cumulative totals and coverage percentages are reported from September 16, 2023 onward, using data from the Illinois Comprehensive Automated Immunization Registry Exchange (I-CARE). The dataset is published by the City of Chicago and was last updated in March 2026.

Use Cases

• Monitor vaccination equity across neighborhoods based on ZIP code-level coverage percentages.
• Analyze age-specific vaccination trends based on the reported age group aggregations.
• Identify geographic areas with low vaccination coverage for targeted public health interventions.
• Assess the impact of updated CDC vaccination criteria on population coverage metrics.

Strengths

• Data is updated weekly with cumulative counts from September 2023 onward.
• Coverage percentages are calculated using 2020 U.S. Decennial Census population estimates.
• Includes detailed age group breakdowns, including an 'All ages' category.

Limitations

• Coverage percentages are capped at 99% and may exceed 100% in smaller ZIP codes.
• Column-level documentation is absent; field semantics must be inferred after download.
• Vaccination addresses may be incorrectly reported, potentially affecting geographic accuracy.

Provenance

Source

City of Chicago, via Illinois Comprehensive Automated Immunization Registry Exchange (I-CARE).

Collection Method

Weekly cumulative totals reported by medical providers based on patient home address and age.

Time Range

From week ending September 16, 2023 onward.

Freshness

Last updated 2026-03-22 04:03:34.858514; freshness should be verified.

Geography

Chicago, Illinois, United States, aggregated by ZIP Code.