Mercer County Airport may refer to:
Mercer County Airport (Illinois) in Aledo, Illinois, United States (FAA: C00) Mercer County Airport (West Virginia) in Bluefield, West Virginia, United States (FAA: BLF) Mercer County Regional Airport in Hazen, North Dakota, United States (FAA: HZE) Trenton-Mercer Airport, formerly Mercer County Airport, in Trenton, New Jersey, United States (FAA: TTN)