David George Arkin (December 24, 1941 – January 14, 1991) was an American actor, known for his numerous supporting appearances in the films of Robert Altman.

These roles were part of Altman's frequent ensemble and included Staff Sergeant Vollmer in M*A*S*H (where he also wrote and voiced the PA announcements), Harry in The Long Goodbye (1973), Norman in Nashville (1975), and The Mailman/The Police Officer in Popeye (1980).

Arkin had an "introducing" credit in I Love You, Alice B. Toklas (1968) and brief appearances in Valley of the Dolls (1967), All the President's Men (1976), and Cannonball (1976).

He also appeared on The Tonight Show Starring Johnny Carson and on the Joey Bishop and the Steve Allen late night shows with the Hollywood Sunset Strip improvisational comedy troupe The Session (which included Richard Dreyfuss, Rob Reiner, Larry Bishop, Bobbie Shaw-Chance, Marj Dusay, and Phil Mishkin); he later performed with The Second City touring troupe.

She also produced and directed One Man's Opinion, a politically incorrect take on newly released films; it starred Arkin and Professor Tyrone Shaw, now on the faculty of journalism at Johnson State College in Vermont.