Portland Municipal Airport (FAA LID: 1M5) is a city-owned, public-use airport located three nautical miles (6 km) northeast of the central business district of Portland, a city in Sumner County, Tennessee, United States.

[1] It is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a general aviation facility.

[2] Portland Municipal Airport covers an area of 157 acres (64 ha) at an elevation of 817 feet (249 m) above mean sea level.

[1] For the 12-month period ending December 31, 2017, the airport had 12,700 aircraft operations, an average of 35 per day: 94% general aviation, 4% military, and 2% air taxi.

At that time there were 21 aircraft based at this airport: 18 single-engine, 2 multi-engine, and 1 helicopter.