Noise Ordinances in Cook County, IL (2026)

9 county-level rules, plus city-specific rules for 10 cities in Cook County, Illinois.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Cook County. If you live within an incorporated city, that city's own rules apply — see the city list below.

Quiet Hours

Cook County regulates noise under Chapter 30, Article V of the Code of Ordinances. Noise that is unreasonably loud or disturbs the peace and comfort of residents in unincorporated areas is prohibited, with enhanced enforcement during nighttime hours.

Cook County Quiet Hours

Some Restrictions

Full ordinance details →Official source ↗

Construction Hours

Cook County regulates construction noise in unincorporated areas under Chapter 30, Article V. Construction activity is generally permitted during daytime hours. The County's building code (Chapter 102) requires compliance with noise provisions during building operations.

Cook County Construction Noise Hours

Some Restrictions

Full ordinance details →Official source ↗

Barking Dogs

Cook County Chapter 10 (Animals) and Chapter 30, Article V (Noise) address persistent barking dogs. Animal owners are responsible for preventing excessive noise. Cook County Animal and Rabies Control handles complaints in unincorporated areas.

Cook County Barking Dog Regulations

Some Restrictions

Full ordinance details →Official source ↗

Leaf Blower Rules

Cook County does not have a specific leaf blower ban or restriction for unincorporated areas. Leaf blowers are subject to general noise provisions under Chapter 30, Article V. Illinois IEPA standards apply statewide.

Cook County Leaf Blower Rules

Few Restrictions

Full ordinance details →Official source ↗

Amplified Music & Events

Amplified music and loud events in unincorporated Cook County are regulated under Chapter 30, Article V noise provisions. Unreasonably loud amplified sound that disturbs neighboring residents is prohibited.

Cook County Amplified Music & Events

Some Restrictions

Full ordinance details →Official source ↗

Aircraft Noise

Cook County has significant aircraft operations from O'Hare (ORD) and Midway (MDW) airports. FAA preempts local regulation. The O'Hare Noise Compatibility Commission manages noise programs for surrounding communities.

Cook County Aircraft Noise

Heavy Restrictions

Full ordinance details →Official source ↗

Industrial Noise

Industrial noise in Cook County is regulated by Chapter 30, Article V and Illinois EPA Title 35, Part 901. Industrial sources (Class C land) emitting noise into residential areas must meet 61 dBA daytime and 51 dBA nighttime limits.

Cook County Industrial Noise Limits

Some Restrictions

Full ordinance details →Official source ↗

Decibel Limits

Cook County noise enforcement under Chapter 30, Article V uses a reasonableness standard. Illinois EPA Title 35, Part 901 sets statewide decibel limits: 61 dBA daytime and 51 dBA nighttime for residential areas (Class A land).

Cook County Decibel Limits

Some Restrictions

Full ordinance details →Official source ↗

Outdoor Music

Outdoor music in unincorporated Cook County is governed by Chapter 30, Article V noise provisions. Music that unreasonably disturbs the peace of neighboring residents is prohibited regardless of time of day, with stricter enforcement at night.