O'Fallon, MO

• Animal control
  O'Fallon Police Department - Animal Control/Park Patrol Section (Animal Control Rangers)

  Phone: 636-240-3200

  Website: https://ofallon.mo.us/animal-control

  Impound: Impounded animals go to St. Charles County Animal Control (The Pet Adoption Center), 4850 Mid Rivers Mall Dr, St. Peters, MO 63376, 636-949-7387

  Phone note: Police Dispatch; press 1 for Animal Control

  Ordinance url: https://www.ecode360.com/27594035

  Source: City of O'Fallon - Animal Control · Checked Nov 5, 2026
• Emergency vet care

  Hours are only as each source states them. Call before you go.

  VSS West (Veterinary Specialty Services)

  Phone: (636) 244-8999

  Address: 7770 Winghaven Blvd, O'Fallon, MO 63368

  Website: https://www.vssstl.com/services/speciality/emergency-services

  City: O'Fallon

  Site states VSS and VSS West 'are always open to help your pet in an emergency'.

  Source: Veterinary Specialty Services - Emergency Services · Checked Nov 5, 2026
• Animal shelters and rescues
  St. Charles County Pet Adoption Center

  Phone: 636-949-7387

  Address: 4850 Mid Rivers Mall Dr, St. Peters, MO 63376

  Website: https://www.sccmo.org/824/Pet-Adoption-Center

  Type: county animal shelter (St. Charles County Animal Control); receives O'Fallon impounds

  Source: City of O'Fallon - Animal Control · Checked Nov 5, 2026
• Pet licence required
  Website: https://ofallon.mo.us/animal-control

  Rule: Registration is through St. Charles County (county rabies tags/licenses issued by veterinarians, fees apply). The City additionally requires every pet picked up at-large by Animal Control Rangers to have a microchip.

  Species: dog, cat, ferret

  Required: Yes

  Ordinance url: https://www.ecode360.com/27594035

  Source: City of O'Fallon - Animal Control · Checked Nov 5, 2026
• Rabies vaccination requirement (2)
  • Website: https://health.mo.gov/providers/manuals/communicable-disease-investigation-reference-manual/rabies-animal

    Rule: Rabies vaccination of animals in Missouri may only be legally performed by a licensed veterinarian (RSMo 322.010, 340.216; 20 CSR 2270-4.031).

    Scope: statewide

    Applies statewide (Missouri). Source: Missouri DHSS Communicable Disease Investigation Reference Manual - Rabies, animal · Checked Nov 5, 2026
  • Rule: Missouri's rabies law is RSMo Chapter 322 (Protection Against Rabies). Section 322.090 empowers county commissions to adopt rules on licensing, impounding, confinement and rabies control and requires them to operate a county dog pound (may contract with cities); 322.030 requires the owner of a dog exposed to a rabid animal to have it treated by a licensed veterinarian or destroyed. Pet vaccination requirements are therefore set by county and city ordinance.

    Scope: statewide

    Statute url: https://revisor.mo.gov/main/OneChapter.aspx?chapter=322

    Applies statewide (Missouri). Source: Missouri Revisor of Statutes, RSMo 322.090 · Checked Nov 5, 2026
• Spay and neuter help
  Operation SNIP (Humane Society of Missouri & Animal Medical Center of Mid-America)

  Phone: 314.951.1534

  Website: https://hsmo.org/operation-snip/

  Description: Low-cost spay and neuter surgeries for pets of Missouri residents

  Source: Humane Society of Missouri - Operation SNIP · Checked Nov 5, 2026

About this place

• Population
  95,355 (2024)

  Source: U.S. Census Bureau, Vintage 2024 Population Estimates (cities and towns) · Checked Nov 5, 2026
• Land area (sq mi)
  30.989 (2025)

  Source: U.S. Census Bureau, 2025 Gazetteer Files (places) · Checked Nov 5, 2026
• Official website
  http://www.ofallon.mo.us/

  Source: U.S. Census Bureau, 2022 Census of Governments: Government Units Listing · Checked Nov 5, 2026