Origin Seoul, South Korea
Debut May 4, 2016
Disbanded January 29, 2017
Sub Unit I.O.I Sub-Unit
Number of Members 9
Members Nayoung
Oldest Member Nayoung
Youngest Member (Maknae) Jeon Somi
Tallest Member Doyeon
Shortest Member Yoojung
I.O.I Former Members Profile
Nayoung
Full Name
Lim Nayoung
Birthday
December 18, 1995
Birthplace
N/A
Age
30 years and 9 months old
Height
5 feet 7 inches (171 cm)
Weight
110 lbs (50 kg)
Zodiac Sign
Sagittarius
Blood Type
O
Education
Dongduk Girls University
Position
Leader, Main Rapper, Lead Dancer, Vocalist
Instagram
@nayoung_lim
Chungha
Full Name
Kim Chanmi
Birthday
February 9, 1996
Birthplace
N/A
Age
30 years and 8 months old
Height
5 feet 3 inches (161 cm)
Weight
97 lbs (44 kg)
Zodiac Sign
Aquarius
Blood Type
B
MBTI
ISFJ
Education
Sejong University
Position
Main Dancer, Lead Vocalist, Rapper
Instagram
@chungha_official
Sejeong
Full Name
Kim Sejeong
Birthday
August 28, 1996
Birthplace
Jeonju, South Korea
Age
30 years and 1 month old
Height
5 feet 5 inches (164 cm)
Weight
105 lbs (48 kg)
Zodiac Sign
Virgo
Blood Type
AB
Education
Indeogwon High School
Position
Main Vocalist
Instagram
@clean_0828
Chaeyeon
Full Name
Jung Chaeyeon
Birthday
December 1, 1997
Birthplace
Jorye-dong, Suncheon-si, Jeollanam-do, South Korea
Age
28 years and 10 months old
Height
5 feet 5 inches (166 cm)
Weight
108 lbs (49 kg)
Zodiac Sign
Sagittarius
Blood Type
A
MBTI
ISFJ
Education
School of Performing Arts Seoul
Position
Vocalist, Visual
Instagram
@j_chaeyeoni
Sohye
Full Name
Kim Sohye
Birthday
July 19, 1999
Birthplace
N/A
Age
27 years and 2 months old
Height
5 feet 5 inches (166 cm)
Weight
105 lbs (48 kg)
Zodiac Sign
Cancer
Blood Type
A
Education
Kyunggi Girls’ High School
Position
Vocalist, Rapper
Instagram
@s_sohye
Yeonjung
Full Name
Yu Yeonjung
Birthday
August 3, 1999
Birthplace
Seoul, South Korea
Age
27 years and 2 months old
Height
5 feet 6 inches (168 cm)
Weight
92 lbs (42 kg)
Zodiac Sign
Leo
Blood Type
A
MBTI
ESTP
Education
Hanlim Multi Art School
Position
Main Vocalist
Instagram
@uyj__0803
Yoojung
Full Name
Choi Yoojung
Birthday
November 12, 1999
Birthplace
N/A
Age
26 years and 11 months old
Height
5 feet 2 inches (157 cm)
Weight
97 lbs (44 kg)
Zodiac Sign
Scorpio
Blood Type
O
MBTI
ISFJ
Education
Seoul Music High School
Position
Lead Rapper, Lead Dancer, Lead Vocalist
Instagram
@dbeoddl__
Doyeon
Full Name
Kim Doyeon
Birthday
December 4, 1999
Birthplace
Wonju, Gangwondo, South Korea
Age
26 years and 10 months old
Height
5 feet 8 inches (173 cm)
Weight
110 lbs (50 kg)
Zodiac Sign
Sagittarius
Blood Type
O
MBTI
ISTP-A
Position
Vocalist, Visual
Instagram
@lafilledhiver_
Jeon Somi
Full Name
Ennik Somi Douma
Birthday
March 9, 2001
Birthplace
N/A
Age
25 years and 7 months old
Height
5 feet 8 inches (172 cm)
Weight
105 lbs (48 kg)
Zodiac Sign
Pisces
Blood Type
O
MBTI
ENFP
Education
Seoyun Middle School, Hanlim Multi Arts High School
Position
Lead Dancer, Lead Vocalist, Rapper, Face of the Group, Center, Maknae
Instagram
@somsomi0309
Kyulkyung
Full Name
Zhou Jieqiong
Birthday
December 16, 1998
Birthplace
Shanghai, China
Age
27 years and 9 months old
Height
5 feet 5 inches (167 cm)
Weight
105 lbs (48 kg)
Zodiac Sign
Sagittarius
Blood Type
O
Education
Shanghai Conservatory of Music; School of Performing Arts Seoul
Position
Lead Dancer, Vocalist, Visual
Instagram
@zhou_jieqiong1216
Mina
Full Name
Kang Mina
Birthday
December 4, 1999
Birthplace
N/A
Age
26 years and 10 months old
Height
5 feet 4 inches (162 cm)
Weight
92 lbs (42 kg)
Zodiac Sign
Sagittarius
Blood Type
O
Education
Seoul School of Performing Arts
Position
Lead Dancer, Vocalist, Rapper
Instagram
@_happiness_o
Member Ages: Oldest to Youngest
Member
Birthday
Age
Nayoung
December 18, 1995
30 years, 9 months, 25 days old
Chungha
February 9, 1996
30 years, 8 months, 4 days old
Sejeong
August 28, 1996
30 years, 1 month, 15 days old
Chaeyeon
December 1, 1997
28 years, 10 months, 12 days old
Kyulkyung
December 16, 1998
27 years, 9 months, 27 days old
Sohye
July 19, 1999
27 years, 2 months, 24 days old
Yeonjung
August 3, 1999
27 years, 2 months, 10 days old
Yoojung
November 12, 1999
26 years, 11 months, 1 day old
Doyeon
December 4, 1999
26 years, 10 months, 9 days old
Mina
December 4, 1999
26 years, 10 months, 9 days old
Jeon Somi
March 9, 2001
25 years, 7 months, 4 days old
FAQs
How many members are in I.O.I?
I.O.I is a 9-member K-pop girl group. The group consists of Nayoung, Chungha, Sejeong, Chaeyeon, Sohye, Yeonjung, Yoojung, Doyeon, Jeon Somi, Kyulkyung, and Mina.
When did I.O.I debut?
I.O.I debuted on May 4, 2016.
