The State Secretary of the South African Republic (Transvaal) was the principal administrative officer of that republic, officially known as the Zuid-Afrikaansche Republiek.

No.	Image	State Secretary	Tenure	Notes
1		Willem Eduard Bok	1880–1888
2		Willem Johannes Leyds	1888–1897
–		Cornelis van Boeschoten	1897	During extended visit of Leyds to Europe (April–July 1897).[1]
2		Willem Johannes Leyds	1897–1898	In view of the deteriorating relationship with the British, it was decided that it would politically be better to have an Afrikaner as State Secretary rather than a Dutchman, hence Reitz was appointed to the post. Leyds went to Europe as envoy of the South African Republic, a position he held until the end of the war.
3		Francis William Reitz	1898–1902	Former State President of the Orange Free State. Retired from that position in 1896 due to ill-health.