Palmar Sur Airport (IATA: PMZ, ICAO: MRPM) is an airport serving the adjacent towns of Palmar Norte and Palmar Sur in Osa Canton, Puntarenas Province, Costa Rica.

Palmar Norte and Palmar Sur are divided by the Térraba River at its exit from the coastal mountain range, 17 kilometres (11 mi) inland from the Pacific Ocean. The airport is on the southern bank, and north approach and departure cross the river. There is a mountain immediately north of Palmar Norte, and mountainous terrain northwest through northeast of the airport.

The airport is owned and administered by the country's Directorate General of Civil Aviation (DGAC), and is currently served by one daily scheduled flight from San José, plus frequent charter services.

Taxis are available outside the airport. By bus, it costs approximately US$0.20 to Palmar Norte or US$0.60 to Sierpe. It is often used by travelers and tourists who are visiting Sierpe, San Buenaventura, Chontales, Ojochal, and Uvita.

In July, 2018, the airport was closed for major renovations and enhancements. The airport was scheduled to re-open in January 2019.