Lihtenberk Castle (Slovene: Grad Lihtenberk, German: Schloss Lichtenberg) is a 13th-century castle ruin located in the municipality of Šmartno pri Litiji in central Slovenia, directly adjacent to the later Bogenšperk Castle. It is best known for a minor association with the 17th-century historian Johann Weikhard von Valvasor, who owned the ruin and styled himself (among other things) "von Lichtenberg."