Fairfield
URL: https://knowledge.ivjn.us/en/places/oh-fairfield.html

Fairfield is a city in Ohio, United States.

## Overview

Fairfield is a city in [Ohio](https://knowledge.ivjn.us/en/places/ohio.html), United States, with a population of about 42,767[^geonames].

## Geography

- Coordinates: 39.3459, -84.5605

Updated: 2026-10-29

Relations:
- Located in: Butler County https://knowledge.ivjn.us/en/places/oh-butler-county.html

Sources:
- GeoNames US dataset (US.txt / admin2Codes.txt) https://download.geonames.org/export/dump/US.zip