Adeler is a surname. Notable people with the surname include:
- Cort Adeler (1622–1675), Norwegian seaman
- Frederik Adeler (disambiguation), multiple people
- Henrik Adeler (1660–1718), Norwegian civil servant and politician
- Christian Adeler (*1982 in Waldshut, Germany), long distance hiker and cultural ambassador (including from Germany to China, around 28,000 kilometers to date), economist, bathroom architect, regional politician (CDU, Free Voters) and soccer coach (UEFA B course)