The Niagara International Tennis Tournament was a tennis tournament held in Niagara-on-the-Lake, Canada between 1885 and 1923. The tournament was played on outdoor grass courts at the Queen's Royal Hotel and was held in the second half of August. In the final year, 1923, the tournament was held on the courts of the Clifton Hotel.^[1]

Year	Champions	Runners-up	Score
1885	Henry Gordon Mackenzie	R.O.S. Wood	6–2, 6–1, 6-1
1886
1887	E.C. Knight	S. Burrell	6–4, 6-1
1888	Ganson Depew	R.O.S. Wood	6–4, 4–6, 3–6, 6–3, 6-0
1889
1890	Edward E. Tanner	Henry Gordon Mackenzie	6–4, 6–3, 6-1
1891
1892	Arthur E. Fuller	Fritz K. Ward	6–3, 3–6, 6–3, 6–8, 6-4
1893	Fritz K. Ward	Arthur E. Fuller	8–6, 2–6, 6–4, 6–0
1894	Malcolm G. Chase	Fritz K. Ward	6–3, 6–1, 8–6
1895	Carr Neel	Edwin P. Fischer	6–2, 6–2, 6-1
1896	Carr Neel	Fritz K. Ward	6–2, 6–3, 6–3
1897	William S. Bond[2]	Malcolm D. Whitman	7–9, 6–3, 2–6, 6–4, 6–3
1898	William S. Bond[3][4]	Leo Ware	6–4, 1–6, 6–4, 10–8
1899	Raymond D. Little	William S. Bond	6–2, 5–7, 6–4, 2–6, 6–4
1900	Raymond D. Little	Harold H. Hackett	6–2, 4–6, 8–6, 6–2
1901	Raymond D. Little[5]	Edwin P. Fischer	6–3, 4–6, 6–2
1902	Beals C. Wright	Harold H. Hackett	4–6, 6–4, 4–6, 6–1, 6–1
1903	Edwin P. Fischer[6]	Beals C. Wright	walkover
1904	Alphonzo Edward Bell	Robert LeRoy	7–5, 6–4, 4–6, 4–6, 6–2
1905	Irving Wright	D.M. Stewart	13–11, 8–6, 6–4
1906	Irving Wright	Harry C. Johnson	default
1907	Irving Wright	James F. Foulkes	6–1, 6–4, 6–2
1908	Nathaniel Niles	Irving Wright	1–6, 2–6, 6–4, 6–4, 6–4
1909	Nathaniel Niles	George C. Janes	6–1, 6–1, 6–1
1910	Nathaniel Niles	Henry C. Wick	6–1, 6–4, 6–0
1911	Edwin H. Whitney	Fred H. Harris	6–2, 6–2, 5–7, 4–6, 6–3
1912	Richard Norris Williams	William S. McEllroy	6–3, 6–3, 6–4
1913	Clarence Griffin	Edwin H. Whitney	9–7, 1–6, 6–2, 9–7
1914	Clarence Griffin	George M. Church	3–6, 6–1, 6–2, 6–2
1915	No competition (due to WWI)
1916
1917
1918
1919	Ichiya Kumagae	Vincent (Vinnie) Richards	6-1, 6–4, 6–4.[7]
1920	Harold Taylor	James Weber	6–3, 3–6 default
1921	Robert Lindley Murray	Clifford Herd	7–5, 8–6, 6–3
1922	Robert Lindley Murray	Armand Bruneau	6–2, 6–2, 6–2
1923	Robert Lindley Murray	Herbert Bowman	6–2, 4–6, 6–2, 3–6, 6–3

Year	Champions	Runners-up	Score
1893	Maude Delano Osborne	Mrs. Sydney Smith	6–8, 6–3, 6–3
1894	Maude Delano Osborne	Mrs. Whithead	4–6, 6–3, 6–4
1896	Juliette Atkinson	Kathleen Atkinson
1897	Juliette Atkinson	Mrs. Eustace Smith	6–4, 6–3
1898	Juliette Atkinson[4]	Marie Wimer	10–8, 7–9, 6–4, 6–3
1899	Edith Parker	Hallie Champlin	4–6, 6–4, 6–2, 4–6, 6–2
1900	Marie Wimer	Edith Parker	9–7, 3–6, 6–3, 6–2
1901	Marion Jones [5]
1902	Carrie Neely[8]	Nona Closterman	6–4, 6–2
1903	Myrtle McAteer	Carrie Neely	6–4, 6–3
1905	Violet Summerhayes	Miss Day	6–2, 6–3
1907	May Sutton	Edith Rotch	6–2, 6–1
1908	Marie Wagner	Lois Moyes Bickle	6–4, 6–2
1909	May Sutton	J.H. Hannam	6–2, 6–1
1910	Lois Moyes Bickle	Alice Day Beard	6–3, 6–4
1911	Hazel Hotchkiss	May Sutton	0–6, 7–5, 6–0
1912	Mary K. Browne	Dorothy Green	6–2, 7–5
1913	Louise Riddell Williams	Mary K. Browne	8–6, 3–6, 6–4
1914	Lois Moyes Bickle	Edith Rotch	6–0, 6–4