Dog poop laws in St. Louis and St. Charles Counties

What the codes say, town by town

St. Louis County, including its cities

Letting your dog soil someone else’s property without removing the waste immediately is a nuisance (SLCRO 611.210). The county code applies this rule in unincorporated areas and inside the county’s cities, which may add rules of their own (611.020). County fines are $25 for a first offense within 12 months, $100 for a second, $200 for a third or fourth, and $500 from the fifth on; each day counts as a separate offense (611.240).

Ballwin

The strictest rule we’ve found. Waste on public property, subdivision or condominium common areas, or another person’s property must be removed immediately, and it is unlawful to let animal feces accumulate on your own property; it should be removed at least once every 48 hours. Anyone walking a dog must carry cleanup equipment. The general penalty is a fine of up to $1,000 (Sec. 5-3 and 1-6).

O’Fallon

Owners must remove and dispose of all fecal accumulations in the yard where a dog is kept, and pick up after it on their own property, someone else’s, and in public places. Fines are at least $50 for a first offense, $100 for a second, and $150 after that (Sec. 210.030 and 210.120, as amended in 2021).

Wentzville

Accumulations in any yard where an animal is kept must be cleaned up, and waste left on another person’s property, condominium common elements or public property must be removed promptly. Fine of up to $500 (Sec. 205.250).

City of St. Charles

Whoever has the dog is responsible for its waste — on the owner’s own property, another person’s property, vacant lots, streets, sidewalks, common ground and parks.

Unincorporated St. Charles County

Fecal accumulations in any yard where an animal is kept must be removed and disposed of so they don’t attract flies or cause odors, and owners must immediately dispose of waste their dog leaves off their property (Sec. 205.100).

Kirkwood

Waste on public property, sidewalks, subdivision or condominium common areas, or another person’s property must be removed immediately (Sec. 4-33).

Can you report a neighbor who doesn’t pick up? Yes — call animal control. In unincorporated St. Louis County that is St. Louis County Animal Control at 314-615-0650; in O’Fallon, police dispatch at 636-240-3200, option 1; in St. Peters, Animal Control at 636-278-2255. Elsewhere, start with city hall or the police non-emergency line — many cities, including Chesterfield and Wildwood, have their own animal control and rules.

Summaries of the published ordinance text as of September 2026, not legal advice. Codes change, so read the current version before relying on it. Sources: St. Louis County 611.210, 611.020, 611.240, Ballwin 5-3, O’Fallon Ord. 6756, Wentzville 205.250, City of St. Charles, St. Charles County 205.100, Kirkwood 4-33.