Mort Bay

{{Short description|Bay in Papua New Guinea}}

{{distinguish|text=Mort's Dock in Balmain, New South Wales, Australia}}

Mort Bay is a bay located in Morobe Province, Papua New Guinea. It was named after Commander Morton C. Mumma of the United States Navy during World War II.{{cite book |last=Keating |first=Bern |url=https://archive.org/details/mosquitofleet00keat/page/66 |title=The Mosquito Fleet |date=1963 |publisher=Putnam |location=New York |page=66 |oclc=490875902 |url-access=registration}}