Belawan is a harbor in Medan, North Sumatra. Located on the northeast coast of Sumatra, Belawan is Indonesia's busiest seaport outside of Java. It constitutes the most northerly of the city of Medan's 21 administrative districts, and covers an area of 29.44 km²; at the 2010 Census it had a population of 95,506.
There are weekly passenger ships operated by Pelni from Medan to Tanjung Balai Karimun, Batam, Riau Islands and Tanjung Priok, Jakarta
A regular ferry service connects Belawan to across the Strait of Malacca to Penang, Malaysia; at times there was a ferry that also ran from Belawan to Phuket, Thailand and to Langkawi, Malaysia.