An otter is an aquatic or marine carnivorous mammal.
Otter may also refer to:
Places Otter, Germany, a municipality in Lower Saxony Otter, Ontario, Canada, a dispersed rural community Otter, Montana, United States, an unincorporated community Otter, Ohio, United States, an unincorporated community River Otter, Devon, England
Technology Vessels and vehicles Otter (dinghy), a type of two-man sailing dinghy Otter (steamship), a sidewheeler used by the Hudson's Bay Company in the Pacific Northwest from the 1830s Otter (sternwheeler), 1874–1897, mainly in Puget Sound , American sailing ship on which Thomas Muir of Huntershill escaped from an Australian convict settlement in 1796 CFAV Otter, an auxiliary ship of the Royal Canadian Navy HMCS Otter, a ship of the Royal Canadian Navy HMQS Otter, a patrol and examination vessel of the Queensland Maritime Defence Force, and later the Royal Australian Navy HMS Otter, several ships of the Royal Navy USS Otter (DE-210), a destroyer escort of the United States Navy Otter Light Reconnaissance Car, an armoured car built in Canada during World War II De Havilland Canada DHC-3 Otter and De Havilland Canada DHC-6 Twin Otter aircraft M76 Otter, an amphibious cargo carrier used by the United States Marine Corps during the Vietnam War
Computing Otter.ai, a web application which transcribes speech-to-text Otter Browser, an open-source web browser clone of Opera web browser Otter (theorem prover), a public domain software program
Sports teams Cal State Monterey Bay Otters, the athletics teams of California State University, Monterey Bay Evansville Otters, a Frontier League baseball team Erie Otters, a junior hockey team in the Ontario Hockey League, based in Erie, Pennsylvania Huntsville Otters, a junior "C" hockey team, from Huntsville, Ontario Missouri River Otters, a minor pro team in the United Hockey League from 1999 to 2006
People Otter (surname) Otter or Ótr, son of Hreidmar, a dwarf in Norse mythology Otter, a main character in the 1978 film Animal House, played by Tim Matheson Otter (gay culture), LGBT slang similar to bear, but referring to a thinner build Otter (cannabis culture), slang for a habitual consumer of cannabis, from turkish "ot'" meaning grass, weed, or cannabis
Other Otter (2025 film), a Montenegrin coming of age film Otter Media, a mass media company owned by Warner Bros. Discovery Otter, or ottu (instrument), a drone-oboe played in Southern India De Otter, Amsterdam, a windmill Orthodontic Technicians Association (abbreviated as OTA and pronounced "otter") Otter (fishing device), a floating fishing device used from boat or from land equipped with a steering mechanism
See also Maris Otter, a brand name for pale malted barley Ottery (disambiguation)