Martina Hingis defeated the defending champion Lindsay Davenport in the final, 6–3, 6–4 to win the women's singles tennis title at the 1998 Indian Wells Masters.

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. The top eight seeds received a bye to the second round.

	Semifinals							Final
	1	Martina Hingis	6	7
	8	Venus Williams	0	6
								1	Martina Hingis	6	6
								2	Lindsay Davenport	3	4
	3	Steffi Graf	4	6	2/r
	2	Lindsay Davenport	6	4	4

	First round							Second round							Third round							Quarterfinals
								1	M Hingis	6	6
		A Fusai	4	3					S Pitkowski	2	1
		S Pitkowski	6	6											1	M Hingis	6	6
		F Labat	6	3	6											M Babel	2	0
	Q	L Neiland	2	6	1				F Labat	6	1	4
		M Babel	6	6	7				M Babel	4	6	6
	14	B Schultz-McCarthy	7	3	6																	1	M Hingis	6	7
	16	A Kournikova	3	6	6																	5	C Martínez	1	5
	Q	A Dechaume-Balleret	6	4	0			16	A Kournikova	3	6	7
		E Likhovtseva	6	3	6				C Rubin	6	2	6
		C Rubin	3	6	7										16	A Kournikova	3	4
		M Vento	6	6											5	C Martínez	6	6
	Q	K Kunce	3	4					M Vento	7	5	3
								5	C Martínez	6	7	6

	First round							Second round							Third round							Quarterfinals
								4	A Coetzer	6	6
	WC	S Taylor	1	1				Q	A Miller	3	3
	Q	A Miller	6	6											4	A Coetzer	6	4	4
		R Grande	7	3	6										17	J Kruger	2	6	6
		B Schett	6	6	7				B Schett	4	3
		R McQuillan	0	6	5			17	J Kruger	6	6
	17	J Kruger	6	1	7																	17	J Kruger	1	3
	10	D Van Roost	6	6																		8	V Williams	6	6
		C Morariu	1	3				10	D Van Roost	6	6
		B Paulus	6	1	7				B Paulus	4	0
		Y Basuki	4	6	5										10	D Van Roost	4	1
		S Kleinová	0	2											8	V Williams	6	6
		S Farina	6	6					S Farina	3	1
								8	V Williams	6	6

	First round							Second round							Third round							Quarterfinals
								6	I Spîrlea	7	6
		F Li	6	6					F Li	5	2
		O Barabanschikova	4	1											6	I Spîrlea	3	5
		N Sawamatsu	6	4	6										15	N Zvereva	6	7
		M Lučić	2	6	3				N Sawamatsu	4	3
	LL	S Jeyaseelan	2	4				15	N Zvereva	6	6
	15	N Zvereva	6	6																		15	N Zvereva	3	0
	11	A Sugiyama	6	6																		3	S Graf	6	6
	LL	K-A Guse	3	3				11	A Sugiyama	6	4	6
	WC	L Osterloh	5	0				Q	T Snyder	1	6	1
	Q	T Snyder	7	6											11	A Sugiyama	0	1
		T Tanasugarn	6	4	7										3	S Graf	6	6
		M Sánchez Lorenzo	1	6	5				T Tanasugarn	4	1
								3	S Graf	6	6

	First round							Second round							Third round							Quarterfinals
								7	N Tauziat	6	2	5
		S Cacic	6	6					S Cacic	1	6	7
	Q	C Cristea	1	1												S Cacic	4	7	7
		J Halard-Decugis	6	6											9	S Testud	6	6	6
		Å Carlsson	0	2					J Halard-Decugis	3	6	4
		M Serna	4	6	5			9	S Testud	6	1	6
	9	S Testud	6	4	7																		S Cacic	1	5
	13	R Dragomir	6	6																		2	L Davenport	6	7
	WC	C Black	3	3				13	R Dragomir	5	6	6
	Q	T Panova	1	6	6			Q	T Panova	7	0	0
	Q	K Boogert	6	4	1										13	R Dragomir	2	2
		A Frazier	6	6											2	L Davenport	6	6
	LL	F Lubiani	4	1					A Frazier	3	1
								2	L Davenport	6	6

	First round							Qualifying competition
	1	Miho Saeki	3	3
		Tara Snyder	6	6				Tara Snyder		5	6	6
	Barbara Rittner		6	6				Janet Lee		7	2	0
	Janet Lee		7	7

	First round							Qualifying competition
	WC	Alexandra Stevenson	6	7
		Rika Hiraki	1	6				WC	Alexandra Stevenson	7	6	4
		Kristine Kunce	2	6	6				Kristine Kunce	6	7	6
	8	Naoko Kijimuta	6	4	3

	First round							Qualifying competition
	9	Alexia Dechaume-Balleret	6	6
	Alt	Radka Bobková	0	2				9	Alexia Dechaume-Balleret	6	6
	WC	Fabiola Zuluaga	6	3	6			WC	Fabiola Zuluaga	2	0
		Annabel Ellwood	3	6	1

	First round							Qualifying competition
	Jana Nejedly		6	6	6
	Park Sung-hee		7	3	2				Jana Nejedly	1	1
		Mariana Díaz Oliva	6	1				5	Annie Miller	6	6
	5	Annie Miller	7	6

	First round							Qualifying competition
	7	Patricia Hy-Boulais	7	4	6
		Haruka Inoue	5	6	7			Haruka Inoue		1	4
	Larisa Neiland		6	6				Larisa Neiland		6	6
	Lenka Němečková		1	1

	First round							Qualifying competition
		Sonya Jeyaseelan	6	6
	WC	Susanna Modric	2	1				Sonya Jeyaseelan		0	4
		Tatiana Panova	6	6				Tatiana Panova		6	6
	4	Yuka Yoshida	3	4

	First round							Qualifying competition
	6	Francesca Lubiani	6	6
	WC	Dora Krstulović	2	3				6	Francesca Lubiani	4	1
	Cătălina Cristea		6	6					Cătălina Cristea	6	6
	Emmanuelle Gagliardi		2	4

	First round							Qualifying competition
	Nana Miyagi		3	7	3
	Kristie Boogert		6	5	6				Kristie Boogert	6	6
		Lea Ghirardi	2	3				2	Kerry-Anne Guse	3	3
	2	Kerry-Anne Guse	6	6

• 1998 State Farm Evert Cup Draw Archived 2016-03-08 at the Wayback Machine
• WTA draw archive