O'Fallon, MO Animal Ordinances: Cat Rules (2026)
Key Facts
- Heat confinement
- Required, § 210.030(A)(6)
- City cat license
- None; county rabies tag required
- Household cap
- 3 animals over 3 months old
- Feral colony ordinance
- None found in Chapter 210
- First-offense fine
- $50 minimum
Summary
O'Fallon's Animal Control Ordinance treats cats the same as dogs under its general control-of-animals rules: no city cat license exists, but owners must keep a female cat in heat confined so she cannot reach another animal, and the same section caps how many cats a household may keep.
Shall keep every female dog or cat in heat confined in a building or secure enclosed in such manner that such female dog or cat cannot come into contact with another animal except for a planned breeding. ... Shall ensure the animal is properly vaccinated against rabies and other diseases as may be necessary; and displays a current St. Charles County Department of Health tag. ... Shall not keep, or cause to be kept, maintained, or controlled, more than three (3) animals, over the age of three (3) months, per household or business establishment.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4860992; v58 updated 2026-05-14; through 05-14-2026).
Full Breakdown
030(A) applies to any owner having custody of an animal, and the Chapter 210 definitions confirm a CAT is any male or female member of the domestic feline family, so these duties bind cat owners directly. Subsection (A)(6) requires an owner to keep every female dog or cat in heat confined in a building or securely enclosed so that she cannot come into contact with another animal, except for a planned breeding; this is the operative city rule on female cats in heat, and it sits alongside the household cap of three animals over three months old in Subsection (A)(4) and the citywide at-large prohibition in Subsection (A)(1).
The code does not create a separate municipal cat license or registration tag; instead, Subsection (A)(5) requires every owner to ensure the animal is vaccinated against rabies and displays a current St. Charles County Department of Health tag, meaning licensing runs through the county health department rather than a City Hall cat registry. 090 like any other animal, with no separate feral-colony carve-out or caretaker registration scheme in the O'Fallon Code.
Violations & Fines
Under Section 210.120(A)(1), violating any provision of the Animal Control Ordinance, including the heat-confinement and household-limit rules, is punishable by a minimum fine of $50 for a first offense, $100 for a second, and $150 for a third or subsequent offense, with each animal and each day of violation counted as a separate offense. Failure to abate a related nuisance after a 10-day notice can draw a fine up to $500 per day plus abatement costs under Section 210.120(A)(2).
Frequently Asked Questions
Does O'Fallon require a city license for cats?
What does O'Fallon require for a female cat in heat?
Does O'Fallon have a feral cat colony program?
Sources & Official References
Other rules in O'Fallon
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