Women's singles
2018 Stockton Challenger
Champion	Madison Brengle
Runner-up	Danielle Lao
Score	7–5, 7–6(12–10)

Sofia Kenin was the defending champion, but chose not to participate.

Madison Brengle won the title, defeating Danielle Lao in an all-American final, 7–5, 7–6^(12–10).

Seeds

Draw

Finals

	Semifinals							Final
	1	Madison Brengle	6	6
	3	Sofya Zhuk	1	1
								1	Madison Brengle	7	712
									Danielle Lao	5	610
		Danielle Lao	1	6	6
	2	Jessica Pegula	6	2	2

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	M Brengle	6	7
		U Eikeri	4	5				1	M Brengle	6	6
	LL	J Elie	3	1					A Kratzer	3	1
		A Kratzer	6	6											1	M Brengle	6	6
		J Jakšić	1r													A Li	2	1
		A Li	4						A Li	6	7
	WC	V Duval	6	5	5			8	L Davis	2	5
	8	L Davis	4	7	7																	1	M Brengle	6	6
	3	S Zhuk	6	79																		3	S Zhuk	1	1
		K Day	3	67				3	S Zhuk	6	6
	Q	M Manasse	77	4	6			Q	M Manasse	4	3
		R Marino	64	6	0										3	S Zhuk	4	6	6
		M Osaka	6	6												R Anderson	6	4	4
		M Sanchez	1	3					M Osaka	5	4
		R Anderson	6	4	77				R Anderson	7	6
	5	K Ahn	1	6	64

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6/WC	J Loeb	6	6
		E Bektas	4	1				6/WC	J Loeb	3	1
	Q	K Volynets	5	1				JE	W Osuigwe	6	6
	JE	W Osuigwe	7	6											JE	W Osuigwe	2	0
	Q	S Marand	0	6	64											D Lao	6	6
		D Lao	6	2	77				D Lao	6	6
	WC	D Willson	1	0				4	M Bouzková	3	3
	4	M Bouzková	6	6																			D Lao	1	6	6
	7	B Haddad Maia	6	5	0r																	2	J Pegula	6	2	2
		S Karatantcheva	4	7	0				S Karatantcheva	6	61	2
		L Chirico	4	1				Q	A Sadiković	2	77	6
	Q	A Sadiković	6	6											Q	A Sadiković	4	0
	WC	H Carter	77	2	6										2	J Pegula	6	6
		K Sebov	62	6	1			WC	H Carter	63	0
		N Podoroska	0	0r				2	J Pegula	77	6
	2	J Pegula	6	0

References

• Main Draw