1903 U.S. National Championships – Women's singles

Elisabeth Moore won the singles tennis title of the 1903 U.S. Women's National Singles Championship by defeating reigning champion Marion Jones 7–5, 8–6 in the challenge round. Moore had won the right to challenge Jones by defeating Carrie Neely 6–2, 6–4 in the final of the All Comers' competition. The event was played on outdoor grass courts and held at the Philadelphia Cricket Club in Wissahickon Heights, Chestnut Hill, Philadelphia, from June 24 through June 27, 1903.

Women's singles
1903 U.S. National Championships
Champion	Elisabeth Moore
Runner-up	Marion Jones
Score	7–5, 8–6
Draw	11
Seeds	–

Draw

Challenge round

	Challenge Round
	Marion Jones		5	6
	Elisabeth Moore		7	8

All Comers' finals

	Quarterfinals							Semifinals							Finals
	Marjorie Oberteuffer		6	6
	Gertrude Fetterman		2	3
								Marjorie Oberteuffer		0	0
								Elisabeth Moore		6	6
	Elisabeth Moore		6	6
	Miriam Hall		2	0
															Elisabeth Moore		6	6
															Carrie Neely		2	4
	Carrie Neely		6	6
	Clara Chase		0	1
								Carrie Neely		6	6
								Helen Chapman		0	1
	Helen Chapman		6	8
	Corrine Mock		1	6