Jefferson County, MO Noise Ordinances: Amplified Music & Outdoor Sound (2026)
Amplified music rules in Jefferson County, MO, also called sound permit, PA system, or live music ordinances, set decibel limits, time-of-day restrictions, and when permits are required.
Key Facts
- Audibility threshold
- Plainly audible past 50 feet
- Applies to
- Unincorporated Jefferson County
- Exceptions
- Lawful concerts, farm/commercial operations
- Enforcing court
- Jefferson County Municipal Court
- Maximum penalty
- $1,000 fine and/or 1 year in jail
Summary
Jefferson County presumes music, speech, or noise disturbs the peace once it is plainly audible more than fifty feet from its source in the unincorporated area. Radios, music players and instruments played to disturb a reasonable person are prohibited, with a carve-out for lawful concerts and farm or business operations.
A. It shall be unlawful to create a peace disturbance in the unincorporated area of Jefferson County, Missouri, by: 1. Playing any radio, music player, television, audio system, or musical instrument in a manner or at a volume that disturbs the peace of any other reasonable person; except that nothing herein shall be construed to prohibit an otherwise lawful public concert or public performance... B. For the purpose of prosecution under this Section, it shall be presumed that any speech, song, or noise... is disturbing to the peace of another reasonable person if the volume is such that it is plainly audible to persons more than fifty (50) feet away from the source of the noise.
Full Breakdown
120(A) makes it unlawful to create a peace disturbance by "[p]laying any radio, music player, television, audio system, or musical instrument in a manner or at a volume that disturbs the peace of any other reasonable person," excepting an "otherwise lawful public concert or public performance," and separately bars speaking, shouting or singing at a disturbing volume except to summon emergency help. 130), though that shield does not authorize conduct banned elsewhere in the County Code. 030.
Violations & Fines
A loud noise citation under Section 205.120 is prosecuted in Jefferson County Municipal Court by the County Municipal Prosecutor and carries the General Penalty of Section 100.030: a fine up to $1,000, up to one year in the County Jail, or both, with each day of a continuing violation a separate offense.
Frequently Asked Questions
How loud can music legally be in unincorporated Jefferson County?
Are farms and businesses exempt from the noise ordinance?
Is there an exception for concerts or public performances?
Sources & Official References
Other rules in Jefferson County
Compare Jefferson County to another location·View the Missouri noise ordinances overview
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