Märklin is a German toy company, founded in 1859. Although it originally specialized in doll house accessories, today it is known for model railways, releasing its first wind-up train with cars that ran on expandable track in 1891.

Märklin is responsible for the creation of virtually every popular model railroad gauge or scale, with only noteworthy exceptions being N scale and Wide gauge. Its older trains are considered highly collectible today.

Today, Märklin markets trains and accessories in Gauge 1, HO, and Z gauge.