Molkenboer is a Dutch surname.
Notable people with this surname include: (1796-1863), Dutch architect Hermanna Molkenboer-Trip (1851–1911), Dutch industrialist Willem Molkenboer (1844-1915), Dutch sculptor His children: Theo Molkenboer (1871–1920), Dutch painter (1872-1960), Dutch painter (1879-1948), Dutch monk and literary scholar Phemia Molkenboer (1883–1940), Dutch ceramist