| Grant Gillis | |
| Position: | Infielder |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 24 January 1901 |
| Birth Place: | Grove Hill, Alabama, U.S. |
| Death Place: | Thomasville, Alabama, U.S. |
| Debutleague: | MLB |
| Debutdate: | September 19 |
| Debutyear: | 1927 |
| Debutteam: | Washington Senators |
| Finalleague: | MLB |
| Finaldate: | June 25 |
| Finalyear: | 1929 |
| Finalteam: | Boston Red Sox |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .245 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 23 |
| Teams: |
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Grant Gillis (January 24, 1901 – February 4, 1981) was a utility infielder in Major League Baseball who played from 1927 through 1929 for the Washington Senators (1927–28) and Boston Red Sox (1929). Listed at, 165 lb., Gillis batted and threw right-handed. A native of Grove Hill, Alabama, he was signed by Washington out of the University of Alabama. At Alabama he was the first quarterback under Wallace Wade. In a three-season career, Gillis was a .245 hitter (48-for-196) with 10 RBI and 26 runs in 62 games, including 12 doubles and two triples. He did not hit a home run. As an infielder, he made 59 appearances at second base (30), shortstop (26) and third base (3).
Gillis died in Thomasville, Alabama, at age 80.