| Kau Mapu | |
| Office1: | Member of the Legislative Assembly |
| Term1: | 1957–1965 |
| Constituency1: | Aitutaki |
| Death Date: | 20 November 1979 (age 72) |
| Death Place: | Aitutaki, Cook Islands |
Kau Mapu (died 20 November 1979) was a Cook Islands chief, civil servant and politician. He was a member of the Legislative Assembly between 1958 and 1965.
Mapu was descended from several Ariki families and held the title Tearikivao Putokotoko Pareraka Mataiapo.[1] He was a civil servant, working in the Public Works department.[1] In 1958 he was elected to the new Legislative Assembly as a representative of Aitutaki Island Council. He was re-elected in 1961, but the Island Council seats were abolished at the 1965 elections.
He died at his home in Aitutaki in November 1979 at the age of 72.[1]