Walter Louis Millies (October 18, 1906 – February 28, 1995) was an American professional baseball player, scout and manager whose career began in 1927 and extended into the 1970s.

Born in Chicago, he was a catcher during his playing days who threw and batted right-handed and was listed as 5 feet 10 inches (1.78 m) tall and 170 pounds (77 kg).

Millies appeared in 246 games in Major League Baseball over all or parts of six seasons (1934; 1936–1937; 1939–1941) for the Brooklyn Dodgers, Washington Senators and Philadelphia Phillies.

His finest season came in 1936 with Washington, as he set personal bests in plate appearances (229), runs scored (26), hits (67), and batting average (.312).

Then he was a scout for the New York Mets, Houston Astros and Montreal Expos, based in Oak Lawn, Illinois.