Sydney Keepa Jackson (18 December 1938 – 3 September 2007) was a prominent Māori activist, trade unionist and leader.

He played representative rugby union for Wellington in 1959 and 1960, and was a New Zealand Māori trialist.

During this period he and Ngā Tamatoa were influenced by the works of the American Black Panther Party members such as Eldridge Cleaver and Stokely Carmichael.

[4] He stood unsuccessfully for the Auckland City Council on the Labour Party ticket at the 1977 local election.

Jackson was first married to the late Hana Te Hemara, and was survived by his second wife Deirdre Nehua and his eight children.