Roberts International Airport (IATA: ROB, ICAO: GLRB), informally also known as Robertsfield, is an international airport in the West African nation of Liberia. Located near the town of Harbel in Margibi County, the single runway airport is about 35 miles (56 km) outside of the nation's capital of Monrovia, and as an origin and destination point is referred to as "Monrovia". Locally, it is often referred to as simply "RIA." The airport is named in honor of Joseph Jenkins Roberts, the first President of Liberia.

The airport is the nation's busiest and most important aviation facility, currently hosting the country's only scheduled commercial airline services, with direct connections to several major cities in West Africa as well as flights to Europe on Brussels Airlines. The airport reportedly served 228,000 passengers annually in 2018 and recently underwent a major expansion, including the opening of a new passenger terminal. The facility with its 11,000 feet (3,353 m) long runway was an emergency landing site for the United States' Space Shuttle program and is one of only two with paved runways in the country. While Monrovia's secondary airport, Spriggs Payne, is much closer to the city center and possesses the nation's only other paved runway, it has not had scheduled commercial service since ASKY Airlines suspended service in November 2014.