| Post: | Secretary-General |
| Body: | the Association of Southeast Asian Nations |
| Insigniacaption: | Emblem of ASEAN |
| Termlength: | Five years, non-renewable |
| Style: | His Excellency |
| Residence: | ASEAN Secretariat |
| Seat: | Jakarta, Indonesia |
| Incumbent: | Kao Kim Hourn |
| Incumbentsince: | 1 January 2023 |
| Inaugural: | Hartono Dharsono |
| Constituting Instrument: | ASEAN Charter |
| Appointer: | ASEAN Summit |
The secretary-general of ASEAN is the chief administrative officer of the Association of Southeast Asian Nations (ASEAN). The secretary-general must come from an ASEAN member state and will be appointed during the ASEAN Summit based on the alphabetical order of member states.[1] The term of office is five years.[2]
| Term | Portrait | Name | Country | ||
|---|---|---|---|---|---|
| 1 | 7 June 1976 – 18 February 1978 | Hartono Dharsono |  Indonesia | ||
| 2 | 19 February 1978 – 30 June 1978 | Umarjadi Njotowijono | Indonesia | ||
| 3 | 10 July 1978 – 30 June 1980 | Ali Abdullah |  Malaysia | ||
| 4 | 1 July 1980 – 1 July 1982 | Narciso G. Reyes |  Philippines | ||
| 5 | 18 July 1982 – 15 July 1984 | Chan Kai Yau |  Singapore | ||
| 6 | 16 July 1984 – 15 July 1986 | Phan Wannamethee |  Thailand | ||
| 7 | 16 July 1986 – 16 July 1989 | Roderick Yong | |||
| 8 | 17 July 1989 – 1 January 1993 | Rusli Noor | Indonesia | ||
| 9 | 1 January 1993 – 31 December 1997 | Malaysia | |||
| 10 | 1 January 1998 – 31 December 2002 | Rodolfo Severino Jr. | Philippines | ||
| 11 | 1 January 2003 – 31 December 2007 | Ong Keng Yong | Singapore | ||
| 12 | 1 January 2008 – 31 December 2012 | Surin Pitsuwan | Thailand | ||
| 13 | 1 January 2013 – 31 December 2017 | Lê Lương Minh | |||
| 14 | 1 January 2018 – 31 December 2022 | Lim Jock Hoi | |||
| 15 | 1 January 2023 – present | Kao Kim Hourn |  Cambodia |