North Bass Island Airport (FAA LID: 3X5) is a public airport located on North Bass Island, Ohio, United States. It is owned and operated by the Put In Bay Township Port Authority.

Approaches to the airport are challenging due to the airport's close proximity to the Canadian border. Canadian airspace is 2 miles from the runway's threshold.

The airport is mainly used to bring mail to North Bass Island and to transport citizens to and from nearby islands as well as mainland Ohio.

The airport received a $22,000 grant in 2021 to provide economic relief funds for costs related to operations, personnel, cleaning, sanitization, janitorial services, debt service payments, and combating the spread of pathogens.

The airport received $113,000 from the Federal Aviation Administration in late 2023.

Airlines	Destinations
Griffing Flying Service	Charter: Kelleys Island, Middle Bass, Pelee Island, Put-in-Bay, Rattlesnake Island

North Bass Island Airport covers an area of 33 acres (13 ha) which contains one runway designated 01/19 with a 1,804 ft × 60 ft (550 m × 18 m) asphalt pavement.

There is no fixed-base operator at the airport.

For the 12-month period ending October 1, 2020, the airport had 1,716 aircraft operations, an average of 33 per week, including 58% general aviation and 42% air taxi. No aircraft are based at the airport.

• List of airports in Ohio

• Put In Bay Airport
• Resources for this airport:
  • FAA airport information for 3X5
  • AirNav airport information for 3X5
  • FlightAware airport information and live flight tracker
  • SkyVector aeronautical chart for 3X5