Sir Crawford David Nalder (14 February 1910 – 8 December 1994) was an Australian politician who served as Deputy Premier of Western Australia from 1962 to 1971.
He was leader of the Country Party in Western Australia from 1962 to 1973.
Nalder was born in Katanning, Western Australia.
A farmer, he was elected to Legislative Assembly at the 1947 state election, winning the seat of Wagin.
He switched to the seat of Katanning at the 1950 election.
Having served as the party's deputy leader since 1956, Nalder replaced Arthur Watts as leader of the Country Party in 1962.
He maintained the existing coalition with the Liberal Party (led by David Brand), with the Brand government eventually being defeated at the 1971 election.
Nalder retired from parliament in 1974 and was knighted later that year.