Richard Henry Marx (April 12, 1924 – August 12, 1997) was an American jazz pianist and arranger. He also composed for film, television, and commercials.

Marx and his wife, Ruth (née Guildoo) had a son, Richard Marx, pop singer, songwriter, and record producer. Marx also had two daughters and a son, from a previous marriage. He was of German Jewish descent.

Marx played piano in childhood. He got his professional start playing in nightclubs in Chicago. In the 1950s, he accompanied singer Helen Merrill and released several albums.

Beginning in the 1960s, he spent three decades in advertising, writing commercial jingles for Dial soap, Kellogg's Raisin Bran cereal, Ken-L Ration dog food, Nestle's Crunch candy bars, Arm & Hammer baking soda, Virginia Slims cigarettes, La Choy Chinese food, the Chicago Blackhawks hockey team, and many more. His son Richard and wife Ruth sang on some of the commercials.

Dick Marx also composed a theme for news programs on WBBM-TV in 1975 that would eventually expand to other local stations owned and operated by CBS and used in different arrangements over nearly 50 years before the network introduced a new theme that aligned with its current branding. In the 1980s, he moved to Los Angeles and composed music for the films A League of Their Own and Edwards and Hunt and the television program Fudge. He also performed the horn arrangements on his son's song "Children of the Night".

Marx died in 1997 in Highland Park, Illinois, from injuries caused by a car accident in Las Vegas.

With Johnny Frigo

With Eddie Harris