The Port of Belawan (Chinese: 勿老灣; Pe̍h-ōe-jī: mài lau ôan) is a harbor in Medan, North Sumatra.

The port was initially built in 1890, to provide a location where tobacco could be transferred directly between rail lines from the interior and deep-draft ships.

The harbor expanded in 1907 with the construction of a new section intended for Chinese and indigenous traders, reserving the existing port for European shipping.

In the early twentieth century the port's business expanded, with the growth of major rubber and palm oil plantations in northern Sumatra.

[4] Under a fresh agreement signed on 23 June 2023, the Dubai-based multinational logistics company DP World is set to commence operations at Indonesia’s Belawan New Container Terminal (BNCT) which will greatly expand the port's capacity, after finalising an agreement with the Indonesia Investment Authority (INA) and port operator Pelindo to manage the terminal and begin a major expansion.