The girls' singles tournament of the 2018 Badminton Asia Junior Championships was held from July 18 to 22.^[1] The girls' singles champion of the last edition was Han Yue from China.^[2] The silver medallist in the last edition, Phittayaporn Chaiwan top the seedings this year. China has placed 3 girls (Wang Zhiyi, Zhou Meng, and Wei Yaxin) to fill out the remainder of the top 4 seeded positions.^[3]

	Quarterfinals							Semifinals							Final
	1	Phittayaporn Chaiwan	8	22	7
		Hirari Mizui	21	20	21
									Hirari Mizui	19	21	18
								3	Zhou Meng	21	18	21
	3	Zhou Meng	21	21
		Benyapa Aimsaard	19	8
															3	Zhou Meng	9	8
															2	Wang Zhiyi	21	21
	8	Park Ga-eun	16	21	12
	4	Wei Yaxin	21	16	21
								4	Wei Yaxin	14	12
								2	Wang Zhiyi	21	21
		Lee So-yul	14	18
	2	Wang Zhiyi	21	21

	First round							Second round							Third round							Quarterfinal
								1	P Chaiwan	21	21
		K Darkhanbaatar							Eoon Q X	19	19
		Eoon Q X	w	/	o										1	P Chaiwan	21	21
		T A Ratnayaka														Leung Y Y	9	15
		Leung Y Y	w	/	o				Leung Y Y	18	22	21
		Cheong I T	1	5					Yoon S-j	21	20	10
		Yoon S-j	21	21																		1	P Chaiwan	8	22	7
																							H Mizui	21	20	21
								6	Hsieh Y-y	22	21
		D Kuity	21	21					D Kuity	20	9
		A Zhumabek	18	13											6	Hsieh Y-y	15	14
		Qiu ZY	19	8												H Mizui	21	21
		H Mizui	21	21					H Mizui	21	21
		S Widjaja	21	21					S Widjaja	16	14
		F Low	9	10

	First round							Second round							Third round							Quarterfinal
								3	Zhou M	21	18	21
		A Kurihara	21	21					A Kurihara	19	21	16
		Wong C W	8	9											3	Zhou M	21	21
		Kim S-m	21	21												Kim S-m	17	13
		P Eskandari	9	8					Kim S-m	21	19	21
		Zar K T	9	9					Y E Setiawan	17	21	19
		Y E Setiawan	21	21																		3	Zhou M	21	21
																							B Aimsaard	19	8
								7	A Kashyap	18	17
		Lui L L	11	8					B Aimsaard	21	21
		B Aimsaard	21	21												B Aimsaard	21	13	21
		P K Wardani	14	21	21											I Khan	18	21	14
		Kuo Y-c	21	5	9				P K Wardani	19	13
		I Khan	20	21	21				I Khan	21	21
		Go P K	22	8	18

	First round							Second round							Third round							Quarterfinal
		J Amanda	21	21
		Chio W U	7	14					J Amanda	13	8
		S S Mehta	16	21	23				S S Mehta	21	21
		M M Khairul	21	18	21											S S Mehta	19	11
		R Gunji	21	22	14										8	Park G-e	21	21
		A R Mulyani	14	24	21				A R Mulyani	21	11	16
								8	Park G-e	19	21	21
																						8	Park G-e	16	21	12
		O C M Kambey	21	19																		4	Wei YX	21	16	21
		Tung C-t	23	21					Tung C-t	16	17
		Seng J N	5	8					K Selvam	21	21
		K Selvam	21	21												K Selvam	19	8
		J R Sito	17	21	18										4	Wei YX	21	21
		K Jiantanet	21	12	21				K Jiantanet	12	7
								4	Wei YX	21	21

	First round							Second round							Third round							Quarterfinal
		Lee S-y	21	21
		D A Syarafina	18	19					Lee S-y	21	21
		G Baatarsuren							D Dias	9	17
		D Dias	w	/	o											Lee S-y	21	22
		Lin S-y	21	21												Lin S-y	9	20
		S Loo	5	10					Lin S-y	21	11	21
								5	C Korepap	19	21	16
																							Lee S-y	14	18
		M Shashidharan	21	21																		2	Wang ZY	21	21
		I Gordeyeva	9	10					M Shashidharan	13	13
		L Karupathevan	21	20	10				C Uchiyama	21	21
		C Uchiyama	13	22	21											C Uchiyama	21	11	9
		Wai W	6	9											2	Wang ZY	8	21	21
		Tsang H Y	21	21					Tsang H Y	9	13
								2	Wang ZY	21	21

• Main Draw