Contra Costa County, CA Animal Ordinances: Mandatory Spay/Neuter (2026)
Key Facts
- Governing section
- Ordinance Code § 416-8.018
- Unlicensed dogs
- Must be spayed/neutered before release
- Licensed dogs, 1st impound
- Released intact within 3-year window
- Licensed dogs, 2nd impound
- Mandatory spay/neuter within same 3 years
- Medical exemption
- 2 months to correct, vet-confirmed
- Enforcing agency
- Contra Costa County Animal Services Department
Summary
Contra Costa County's Animal Services Department requires spay or neuter surgery before releasing certain impounded dogs. An unlicensed, unaltered dog picked up under Section 416-8.002 must be fixed before it goes home. A licensed dog gets one free pass: the first impoundment in a rolling three-year period, it's released intact, but a second triggers mandatory surgery.
(a)Unlicensed Dogs. Any unlicensed, unaltered dog impounded under Section 416-8.002 must be spayed or neutered prior to its release from the animal services department unless the dog is exempted from the license requirements under subsection (a) of Section 416-6.004 or has a medical exemption under subsection (d) of this section.(b)Licensed Dogs—First Impoundment Within a Three-Year Period. Any licensed, unaltered dog impounded under Section 416-8.002 will be released intact from the animal services department on the first occasion the dog is impounded within a three-year period.(c)Licensed Dogs—Second Impoundment Within a Three-Year Period. Any licensed, unaltered dog impounded under Section 416-8.002 a second time within a three-year period must be spayed or neutered prior to the dog's release from the animal services department unless the dog has a medical exemption under subsection (d) of this section.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Ordinance Code: Supplement 103).
Full Breakdown
018 ties sterilization to how often a dog lands in the shelter. 004(a) (nonresidents staying 30 days or less, or show/field-trial dogs) or the medical exemption below. Licensed dogs get more leeway: the first time a licensed, unaltered dog is impounded within a three-year window, the department releases it intact, no surgery required. A second impoundment within that same three-year period forces the issue: the dog must be spayed or neutered before release, again unless the medical exemption applies. The medical exemption requires a veterinarian licensed in California to confirm a condition that prevents safe sterilization.
When that happens, animal services releases the dog intact but issues the owner a written notice giving two months to complete the surgery and prove it, and the department can extend that window if the vet confirms the condition still persists. The owner is responsible for paying the cost of any medical exam performed to support the exemption. The rule sits inside Chapter 416-8 (Impoundment), enforced by the Contra Costa County Animal Services Department, the same office that handles licensing, impound fees, and rabies control for the unincorporated county.
Because the trigger is the impound record, not a standalone spay/neuter mandate, dogs never picked up loose are never forced into the program regardless of license status.
Violations & Fines
There's no separate fine schedule attached to Section 416-8.018: the mechanism is that the shelter simply will not release an unaltered dog that owes a mandatory surgery. Ignoring the medical-exemption correction notice, or trying to reclaim a dog without paying for the required procedure, keeps the animal in custody and can trigger an abandonment finding under Section 416-8.014 if fees and requirements go unmet for ten days.
Frequently Asked Questions
Will my licensed dog be neutered if animal services picks it up?
What if my dog is unlicensed when animal services picks it up?
Can I get my dog back without the surgery for a medical reason?
Who pays for the required spay or neuter?
Sources & Official References
Other rules in Contra Costa County
California rules heatmap·Compare Contra Costa County to another location·View the California animal ordinances overview
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