Harry Parker (tennis)
Harry Parker was a New Zealand tennis player who was active during the first two decades of the 20th century.
Parker won the doubles title at the Australasian Championships, the future Australian Open, alongside Bill Gregg in 1907. He also reached two singles finals at the tournament in 1907 and 1913, and two doubles finals in 1906 and 1913.
Grand Slam finals
Singles (2 runners-up)
| Result | Year | Championship | Surface | Opponent | Score |
| Loss | 1907 | Australasian Championships | Grass |  Horace Rice | 3–6, 4–6, 4–6 |
| Loss | 1913 | Australasian Championships | Grass | Ernie Parker | 6–2, 1–6, 3–6, 2–6 |
Doubles (1 title, 2 runners-up)
| Result | Year | Championship | Surface | Partner | Opponents | Score |
| Loss | 1906 | Australasian Championships | Grass | C. Cox | Rodney Heath | 2–6, 4–6, 2–6 |
| Win | 1907 | Australasian Championships | Grass | Bill Gregg | Horace Rice  Gordon Wright | 6–2, 3–6, 6–2, 6–2 |
| Loss | 1913 | Australasian Championships | Grass | Ray Taylor | Ernie Parker Alf Hedeman | 6–8, 6–4, 4–6, 4–6 |