Cotter may refer to: * Cotter pin (disambiguation), a pin or wedge used to fix parts rigidly together * Cotter (farmer), the Scots term for a peasant farmer formerly in the Scottish highlands * Cotter (surname), a surname (including a list of people with the name) * Cotter, Arkansas, United States * Cotter, Iowa, United States * Mount Cotter, a mountain in California, United States * Cotter River, a river in the Australian Capital Territory

See also