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Ada County, ID Animal Ordinances: Cat Rules (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Counts toward limit
Yes, in the 4-animal cap
Rabies vaccination
Required (5-7-10)
Unaltered roaming cat
Deemed a nuisance
Animal Control may
Seize, sterilize, mark, release
TNR
Expressly protected

Summary

Ada County counts cats toward the four-animal household limit and requires rabies vaccination. An unaltered cat allowed outdoors off its owner's control is deemed a nuisance and may be seized, spayed or neutered, and returned by Animal Control.

City-specific rules exist: Boise has its own cat rules rules that differ from Ada County's county-level regulations. If you live in Boise, check the city-specific page instead.

Nuisance Feral Cat Prevention: Any cat not spayed or neutered that is permitted to be out of doors not under the direct control of its owner is deemed a nuisance. The Animal Control Agency may seize any cat at large and may spay or neuter such animal.

Full Breakdown

Cats fall under the four-animal combined limit in 5-7-6 and the rabies vaccination requirement in 5-7-10 (vaccinate within 30 days of the cat reaching four months, or of acquiring/bringing in an unvaccinated cat). Section 5-7-14(E) declares any cat not spayed or neutered that is outdoors off its owner's direct control a nuisance; the Animal Control Agency may seize such a cat at large, spay or neuter it, mark it (for example by ear notch), and release it where it was seized. County code specifically protects TNR-style trap-neuter-return activity: capturing a free-roaming cat, taking it for sterilization, and returning it to its found location is exempt from the abandonment and stray-animal rules (5-7-3(G), 5-7-9).

Violations & Fines

An unaltered free-roaming cat is a nuisance and may be seized and sterilized by Animal Control. Failure to vaccinate against rabies violates 5-7-10; general violations are misdemeanors under 5-7-23.

Frequently Asked Questions

Can my cat roam outdoors in Ada County?
A cat outdoors is not banned, but an unspayed or unneutered cat off its owner's direct control is deemed a nuisance and may be seized and sterilized by Animal Control.
Is trap-neuter-return legal?
Yes. Capturing a free-roaming cat, taking it for sterilization surgery, and releasing it in the approximate location it was found is exempt from the county's abandonment and stray-animal provisions.

Sources & Official References

Other rules in Ada County

All Ada County rules

Compare Ada County to another location·View the Idaho animal ordinances overview

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