Flathead(s) or flat-head may refer to:

Arts and entertainment "Flathead" EP, by The Fratellis "Flathead" (song), by The Fratellis Flathead (film), a 2024 Australian film The ruling family of the Great Underground Empire in the Zork adventure game series, such as Zork Zero

Peoples Bitterroot Salish, or Flathead people, one of three tribes of the Confederated Salish and Kootenai Tribes of the Flathead Nation in Montana Choctaw, a southeastern Native American group also known as the Flatheads Confederated Salish and Kootenai Tribes of the Flathead Nation, known as the Flathead, or Flathead Indian (or Amerindian) tribe

Places Flathead Valley, also known as The Flathead, a region of the U.S. state of Montana Flathead County, Montana Flathead High School, a school in Kalispell, Montana Flathead Indian Reservation, Montana Flathead Lake, Montana Flathead National Forest, Montana Flathead River, Montana

Technology Flathead engine, a valve configuration Flat-head screw, a screw with a flat top, designed to be installed in a countersunk hole Flat-head screwdriver, a screwdriver designed to turn slotted screws

Zoology Fish Platycephalidae, a family of fish known as flatheads Flathead (fish), various species of fish in this family Flathead catfish (Pylodictis olivaris), a species of fish found in North America Flathead grey mullet (Mugil cephalus), a fish species in the mullet family Mugilidae, widespread Flat-headed loach (Oreonectes platycephalus), a species of cyprinid fish Pseudaphritis urvillii, species of fish also known as freshwater flathead and marbled flathead

Other animals Flat-headed cat, a small wild cat Flat-headed frog (Limnodynastes depressus), a species of frog found in Australia Flat-headed kusimanse (Crossarchus platycephalus), a species of mongoose found in West Africa Flat-headed myotis (Myotis planiceps), a species of vesper bat found in Mexico Flat-headed salamander (Desmognathus planiceps), a species of salamander found in the US Flat-headed shrew (Crocidura planiceps), a species of mammal found in Africa

Other uses The Flathead gang, also known as The Flatheads, a group of bank robbers led by Paul Jaworski

See also Plagiocephaly, a medical condition also known as "flat head syndrome"