U-Pb monazite data are reported from the Donkerhuk Granite and associated granitic rocks as well as from metasediments of the Kuiseb Formation in the northwestern part of the Khomas Trough, Damara Orogen, central Namibia. Monazites from an upper amphibolite facies metapelite of the Kuiseb Formation show, within limits of error, a concordant 206Pb/238U age of 513 ± 5 Ma. Monazites from anatectic domains of migmatites, which locally occur in the very north of the Khomas Trough in the vicinity of the Donkerhuk Granite, yield 206Pb/238U apparent ages ranging between 520 and 527 Ma, and provide a lower limit for the temperature peak of regional metamorphism. The late-tectonic intrusion of granitic melts into the metasedimentary series and the migmatite zone is indicated by 206Pb/238U monazite ages between 505 and 507 Ma which postdate the metamorphic peak. Although most data are concordant within limits of error, monazite fractions extracted from migmatites appear to plot systematically above the concordia curve and thus the geologic ages have to be qualified.