Newton Henry Allen (May 19, 1901 – June 9, 1988) was an American second baseman and manager in baseball's Negro leagues.

Born in Austin, Texas, he began his Negro league career late in 1923 with the Kansas City Monarchs and, except for brief stints with other teams in 1931 and 1932, stayed with the Monarchs until his retirement in 1948. Long known for his leadership ability, he became the Monarchs' manager in 1941 when Andy Cooper suffered a pre-season stroke and died during the season. He won the Negro American League championship that season, but resigned as manager just before the beginning of the following season, resuming his duties as a reserve infielder.

Allen's accomplishments as a player were even more impressive. A master at scoring runs, he bunted, stole bases and almost always provided the spark his team needed to win. Among the fastest baserunners of his generation of Negro leaguers, his most remarkable season was his 1929 campaign, in which he batted .330 while hitting 24 doubles and stealing 23 bases in a typically abbreviated Negro league season.

Allen is listed on the second team of a 1952 Pittsburgh Courier poll of the greatest black baseball players of all time.^[3] Allen made the list of 39 finalists for the 2006 special Negro leagues and Pre-Negro leagues Election for the Baseball Hall of Fame, but was not one of the 17 finally chosen.

Allen died at age 87 in Cincinnati, Ohio.

• Career statistics from MLB, or Baseball Reference and Baseball-Reference Black Baseball Stats and Seamheads
• Newt Allen managerial career statistics at Baseball-Reference.com
• Baseball Hall of Fame candidate biography at the Wayback Machine (archived February 7, 2006)