Jefferson County, MO Animal Ordinances: Mandatory Spay/Neuter (2026)
Key Facts
- Spay/neuter trigger
- Adoption of any animal over 3 months old
- Microchip fee
- $35 if not already chipped
- 2nd impoundment fee
- $75 sterilization fee if unsterilized
- Age exemption
- Animals under 3 months
- Non-payment consequence
- Animal held or may be euthanized
- Enforcing agency
- Jefferson County Animal Control Division
Summary
Jefferson County requires every animal over three months old to be spayed or neutered before it can be adopted from the Animal Control Center, and requires microchipping before any impounded animal, adopted or redeemed by its owner, can be released, with owners paying the cost.
No animal impounded for any reason in the Animal Control Center shall be released until the animal is microchipped for identification. If the animal has not been microchipped, the person wanting to redeem or adopt the animal shall pay in advance a fee of thirty-five dollars ($35.00) to have the animal microchipped. No animal shall be released to any person who refuses to pay the fee in advance. No animal over three (3) months of age shall be adopted until the animal has been spayed or neutered and the cost of said spay or neuter is paid as part of the adoption fee in advance of the adoption.
Full Breakdown
270, Requirement to Spay or Neuter and Microchip for the Release of All Animals, bars the Animal Control Center from releasing any impounded animal until it is microchipped for identification; if it has not already been microchipped, the person redeeming or adopting it must pay a $35 fee in advance, and the Center will not release an animal to anyone who refuses to pay. Separately, no animal over three months of age may be adopted until it has been spayed or neutered, with that cost folded into the adoption fee and paid before the adoption is finalized.
280 layers additional pressure onto owners who redeem their own animal after repeated impoundments: the first time an animal is picked up, the owner may request release without spay/neuter, but the second time it is impounded, the owner must either prove the animal is already sterilized or pay an additional $75 sterilization fee, and every subsequent impoundment repeats that requirement. 270's age threshold.
Violations & Fines
Refusing to pay the microchip or spay/neuter fees required for release under Section 215.270 keeps the animal held at the Animal Control Center, and Section 215.280(E) allows the county to dispose of an animal, including by humane euthanization, if the owner refuses to comply with these release requirements. Chapter 215 violations generally carry the Section 215.460 misdemeanor penalty of up to $1,000 or one year in jail, or both, and owners remain liable for all fees regardless of whether the animal is ultimately euthanized or abandoned at the Center.
Frequently Asked Questions
Do I have to spay or neuter my dog just because I own it?
Can I get my impounded pet back without paying for microchipping?
What happens on a second impoundment if my dog isn't fixed?
Sources & Official References
Other rules in Jefferson County
Compare Jefferson County to another location·View the Missouri animal ordinances overview
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