# O'Fallon

> English word · Proper noun · frequency rank #87,625

## Definitions
1. A surname from Irish.
2. A city in St. Clair County, Illinois, United States.
3. A city in St. Charles County, Missouri, United States.

## Etymology
See Fallon.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/o-fallon