Klein Modellbahn was an Austrian model railway manufacturer.
The company was founded in 1984 in Vienna. It closed the production in 2008 and the sales in 2010.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>
Their product line consisted of mostly Austrian rolling stock and locomotives in H0 scale, covering both the pre–World War I Südbahn and the postwar ÖBB.