Leerdammer is a Dutch semi-hard cheese made from cow's milk. It has a creamy white texture and was made to be similar in appearance and flavor to Emmental, but it is rounder in taste. It has a sweet and somewhat nutty flavor that becomes more pronounced with age. This cheese can be served cold as an appetizer, a snack, a sandwich cheese, or as a breakfast cheese with meats or bread. It also can be baked and grilled, as it melts nicely to complement a variety of food dishes.

The Leerdammer name is trademarked; the cheese is produced exclusively by the Groupe Bel. Leerdammer cheese is produced in Schoonrewoerd in the municipality of Leerdam, the city which gave Leerdammer its name. The cheese's development was begun in 1976, and it was first introduced to market in 1984. Cheese in the Leerdammer style but without the trademarked name is sold as Maasdam cheese.