| Tom Heintzelman | |
| Position: | Infielder |
| Birth Date: | 3 November 1946 |
| Birth Place: | St. Charles, Missouri |
| Bats: | Right |
| Throws: | Right |
| Debutleague: | MLB |
| Debutdate: | August 12 |
| Debutyear: | 1973 |
| Debutteam: | St. Louis Cardinals |
| Finalleague: | MLB |
| Finaldate: | October 1 |
| Finalyear: | 1978 |
| Finalteam: | San Francisco Giants |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .243 |
| Stat2label: | Home runs |
| Stat2value: | 3 |
| Stat3label: | Runs batted in |
| Stat3value: | 12 |
| Teams: |
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Thomas Kenneth Heintzelman (born November 3, 1946) is an American former professional baseball player. An infielder, he played in 90 Major League games over parts of four seasons with the St. Louis Cardinals and San Francisco Giants. He threw and batted right-handed, stood 6feet tall and weighed .
Heintzelman was drafted by the Cardinals in the seventh round of the 1968 Major League Baseball Draft and made his major league debut during the season. Following the baseball season, he was traded to the Giants for Jim Willoughby.
Heintzelman's father, Ken Heintzelman, had a 13-season MLB career as a pitcher.
Tom Heintzelman served during the Vietnam War making him one of fifty-four former Major League baseball players who are also veterans of the Vietnam War.
Tom has three children and currently resides in Phoenix, Arizona. His children are Jennifer Doroty, Lora Heintzelman, and Brian Heintzelman.