Oud-Valkenburg (English: Old-Falkenburg) is a village in the Dutch province of Limburg. It is located in the municipality of Valkenburg aan de Geul, and has about 130 inhabitants.
Oud-Valkenburg was a separate municipality until 1940, when it was merged with Valkenburg. The municipality included the villages Sibbe and IJzeren.
Although small, Oud-Valkenburg counts several monuments, among which are two medieval castles: Genhoes and Schaloen. Noteworthy is also the Roman Catholic church of Saint John the Baptist (medieval nave; choir and baroque altar inside by Johann Joseph Couven).