Isaac Luck (12 May 1817 – 15 December 1881) was a New Zealand architect.
A professional builder, he arrived in Lyttelton on the Steadfast in 1851.
He was the third chairman of the Christchurch Town Council.
He was the brother-in-law of and in partnership with Benjamin Mountfort, and was the less well-known architectural partner for the design of the Canterbury Provincial Council Buildings.