October 1
1995 - Siyeon - Dreamcatcher

October 2
2003 - Seunghan - RIIZE

October 3
1997 - Bang Chan - Stray Kids
1997 - Juri - Rocket Punch

October 4
1995 - Jeonghan - Seventeen
1996 - Jeon Jiwoo - KARD
1997 - Yuju - soloist, Gfriend

October 5
2004 - Baeksung - Epex
2005 - Hunter - Xikers
2005 - Yujun - Xikers

October 6
1994 - Joohoney - Monsta X
2000 - Lua - Weki Meki
2004 - Alex - Drippin (left the group)
2004 - Hanni - NewJeans

October 7
1991 - Nicole - Kara
2001 - Jiung - P1Harmony
2003 - Huijun - MCND

October 8
2001 - Yunjin - Le Sserafim

October 9

October 10
1995 - Seunghee - CLC (disbanded)
2000 - YangYang - NCT/WayV

October 11
2001 - JM - Just B

October 12
2000 - Jongho - ATEEZ

October 13
1995 - Jimin - BTS
1998 - Seungmin - Golden Child

October 14

October 15
1986 - Donghae - Super Junior
1997 - Jeon Woong - AB6IX
2001 - Heeseung - Enhypen
2002 - Hyunseung - Younite
2004 - Ji Yunseo - EVNNE

October 16
1999 - J-Min - BAE173
2000 - Woobin - Cravity

October 17
2002 - Lily - NMIXX

October 18

October 19
2000 - Heejin - ARTMS, Loona
2004 - Sion - Younite

October 20
1992 - BM - KARD
1999 - Chuu - soloist, ex-Loona
2004 - Leehan - Boynextdoor

October 21
2000 - Junhyung - Ghost9
2005 - Yechan - Xikers

October 22
2001 - Jo Yuri - soloist, actress, IZ*ONE (disbanded)
2003 - Riwoo - Boynextdoor

October 23
1997 - Minnie - (G)I-DLE
2002 - NigNing - Aespa
2003 - Dohyun - Lun8

October 24
1994 - Krystal - actress, f(x)

October 25
1996 - Yanan - Pentagon
1998 - Lee Know - Stray Kids

October 26
1995 - Yuta - NCT
2002 - Eunsang - Younite
2002 - Soeun - Weeekly

October 27
1996 - Kim Wooseok - soloist, Up10tion (left the group), X1 (disbanded)

October 28
1997 - Winwin - NCT/WayV

October 29

October 30
1994 - Youngji - Kara
2000 - Giselle - Aespa
2000 - Yunseong - Drippin

October 31