Eric Henry Halstead, CBE (26 May 1912 – 18 June 1991) was a New Zealand politician of the National Party and later a diplomat.
Halstead was born in Auckland in 1912, and educated at Auckland Grammar School and Auckland University. He was a Major in the NZEF in World War II.
In 1940 he married Millicent Joan Stewart; they had four children.
He represented the Tamaki electorate from 1949 to 1957, when he was defeated by Bob Tizard. He held the following cabinet posts:
He later served as Ambassador to Thailand and Laos 1970–1973, then Ambassador to Italy and Ambassador to Iraq concurrently from 1976–1980 and Ambassador to Saudi Arabia (while resident in Rome) 1977–1980.
He was awarded a C.B.E. in 1980. He died in Auckland in 1991.