Charles Linwood "Buck" Williams (born March 8, 1960) is an American former professional basketball player and former assistant coach for the Portland Trail Blazers.

Williams, a 6 ft 8 in (2.03 m) power forward born in Rocky Mount, North Carolina, ranks 16th all-time in National Basketball Association (NBA) career rebounds.

National recognition of his performances came when he was selected to the 1980 USA Olympic basketball team, alongside such players as later two-time NBA champions Isiah Thomas and Mark Aguirre; he, however, never got to represent the national colors in Moscow due to the United States’ boycott.

On June 24, 1989, the Nets traded Williams to the Portland Trail Blazers in exchange for Sam Bowie and a draft pick.

In Portland, Williams would continue his solid play and take a complementary frontcourt role to established guard duo Clyde Drexler and Terry Porter.

[6] In the twilight of his career, after the 1995–96 season, Williams moved back to the Atlantic Division, signing with the New York Knicks, where he played in a much more limited capacity, behind the frontcourt duo of Patrick Ewing and Charles Oakley.