Singles
2004 Western & Southern Financial Group Women's Open
Final
Champion	Lindsay Davenport
Runner-up	Vera Zvonareva
Score	6–3, 6–2
Details
Draw	30
Seeds	8
Events
Singles Doubles
← 1988 · Cincinnati Masters · 2005 →

Lindsay Davenport defeated Vera Zvonareva 6–3, 6–2 in the final to win the women's singles tennis title at the 2004 Cincinnati Open. It was her 6th title of the year and the 44th of her career.

This event was not held from 1989 onwards, so no defending champion was declared. Barbara Potter was the last champion in the 1988 edition.

The first two seeds received a bye into the second round.

	Semifinals							Final
	WC/1	Lindsay Davenport	w/o
	4	Marion Bartoli
								WC/1	Lindsay Davenport	6	6
								2	Vera Zvonareva	3	2
	3	Amy Frazier	6	64	1
	2	Vera Zvonareva	3	77	6

	First round							Second round							Quarterfinals							Semifinals
								WC/1	L Davenport	4	6	6
	WC	L Osterloh	6	6				WC	L Osterloh	6	4	1
	Q	Ad Serra Zanetti	2	3											WC/1	L Davenport	6	6
		V Razzano	1	2											7	F Pennetta	2	2
		R Grande	6	6					R Grande	77	2	4
		T Ashley	78	63	5			7	F Pennetta	61	6	6
	7	F Pennetta	66	77	7																	WC/1	L Davenport	w/o
	4	M Bartoli	6	6																		4	M Bartoli
		M Kirilenko	3	3				4	M Bartoli	6	6
		M Santangelo	4	6	7				M Santangelo	4	0
	Q	S Beltrame	6	3	5										4	M Bartoli	6	6
		L Granville	2	6	6											L Granville	3	1
		S Kleinová	6	3	4				L Granville	6	6
	Q	Y Fedak	4	4				5	D Chládková	1	1
	5	D Chládková	6	6

	First round							Second round							Quarterfinals							Semifinals
	8	M Weingärtner	6	3	6
		E Gagliardi	3	6	2			8	M Weingärtner	7	4	3
		S Sfar	6	0					S Sfar	5	6	6
		C Pin	4	0r												S Sfar	3	1
		M Irvin	2	4											3	A Frazier	6	6
		M Washington	6	6					M Washington	4	3
	LL	S Foretz	2	5				3	A Frazier	6	6
	3	A Frazier	6	7																		3	A Frazier	6	64	1
	6	J Craybas	3	3																		2	V Zvonareva	3	77	6
	Q	S Peng	6	6				Q	S Peng	7	4	6
		A Jidkova	64	6	77				A Jidkova	5	6	1
		L Waters	77	4	61										Q	S Peng	2	2
		A-L Grönefeld	62	2											2	V Zvonareva	6	6
	LL	An Serra Zanetti	77	6				LL	An Serra Zanetti	4	63
								2	V Zvonareva	6	77

• Main and Qualifying Draws