Directors and Secretaries-General of ITU
| Directors of ITU | |||
|---|---|---|---|
| Name | Beginning of term | End of term | Country |
| Louis Curchod | 1 January 1869 | 24 May 1872 | Switzerland |
| Karl Lendi | 24 May 1872 | 12 January 1873 | Switzerland |
| Louis Curchod | 23 February 1873 | 18 October 1889 | Switzerland |
| August Frey | 25 February 1890 | 28 June 1890 | Switzerland |
| Timotheus Rothen | 25 November 1890 | 11 February 1897 | Switzerland |
| Emil Frey | 11 March 1897 | 1 August 1921 | Switzerland |
| Henri Étienne | 2 August 1921 | 16 December 1927 | Switzerland |
| Joseph Raber | 1 February 1928 | 30 October 1934 | Switzerland |
| Franz von Ernst | 1 January 1935 | 31 December 1949 | Switzerland |
| Secretaries general | |||
| Léon Mulatier | 1 January 1950 | 31 December 1953 | France |
| Marco Aurelio Andrada | 1 January 1954 | 18 June 1958 | Argentina |
| Gerald C. Gross | 1 January 1960 | 29 October 1965 | United States |
| Manohar Balaji Sarwate | 30 October 1965 | 19 February 1967 | India |
| Mohamed Ezzedine Mili | 20 February 1967 | 31 December 1982 | Tunisia |
| Richard E. Butler | 1 January 1983 | 31 October 1989 | Australia |
| Pekka Tarjanne | 1 November 1989 | 31 January 1999 | Finland |
| Yoshio Utsumi | 1 February 1999 | 31 December 2006 | Japan |
| Hamadoun Touré | 1 January 2007 | present | Mali |
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