JKT48 is an Indonesian girl group formed in 2011 as a sister group of the Japanese idol group AKB48. Since 2021, members are selected through auditions in Jakarta, Indonesia. Among the members are Trainees who serve as understudies for the main members. Those who leave the group on amiable terms are considered "graduates" and given a last theater show, sometimes accompanied with either a special graduation show or concert.

On 11 January 2021, it was announced that the group would forcibly mass-graduate 26 of its members as it was hit by crisis caused by the COVID-19 pandemic and government-imposed large-scale social restrictions. They officially left the group in mid-March 2021.

Most of the group's members are Indonesians, however there have been some Japanese in the group, as well as a Malaysian and an Australian. Non-Indonesian members are denoted with a flag before their name. As of 13 September 2025 midnight, the group individually consists of 55 members.

As of 13 September 2025 midnight, the group individually consists of 55 members: 34 regular members, 12 trainees from the 12th generation, and nine trainees from the 13th generation.

Between 2 November 2011 and 23 December 2012 and later from 15 March 2021, there are no teams exist within the group. In between, members were grouped into three teams. The teams were:

There were also an Academy, which replaced the term of Research Students or Trainees (Japanese: 研究生, Hepburn: Kenkyūsei) since 8 April 2018. The academy – existed between 15 April 2018 and 11 March 2021 – was divided into two classes, Class A and Class B.

Name outside "( )" are those listed in the member's personal profile on JKT48 website.

The current trainees are 13 members from 12th generation, and nine newly recruited members from the 13th generation on 31 October 2024.