Langsa is a city located in the province of Aceh on the island of Sumatra, Indonesia. It covers a total area of 239.83 square kilometres and serves as a regional population center.
The city's geography is defined by its borders with several surrounding districts. Aside from a small seacoast to the northeast, it borders the Manyak Payed District of Aceh Tamiang Regency to the east and is otherwise surrounded by the Birem Bayeun District of Aceh Timur Regency to the north, west, and south.
Demographic data shows steady population shifts in the region. According to the 2010 Census, the city had a population of 148,945, which increased to 185,971 by the 2020 Census; the official estimate as of mid-2025 was 184,016.