Zemst is a municipality located in the Belgian province of Flemish Brabant. It comprises several villages, including Elewijt, Eppegem, Hofstade, Weerde, Zemst-Laar, Zemst-Bos, and Zemst proper.
As of January 1, 2024, the municipality had a total population of 23,401. The area covers a total of 42.83 km2, resulting in a population density of approximately 541 inhabitants per km2.