Charles Locke Eastlake (1836–1906) was a British architect and furniture designer. Trained by the architect Philip Hardwick (1792-1870), he popularised William Morris's notions of decorative arts in the Arts and Crafts style, becoming one of the principal exponents of the revived "Early English" or "Modern Gothic Style" popular in Victorian architecture. He made no furniture himself, his designs being produced by professional cabinet makers. The style of furniture named after him, Eastlake style, flourished in the later half of the nineteenth century.
From 1866 to 1877 he was secretary to the Royal Institute of British Architects, and from 1878 to 1898 he was Keeper of the National Gallery in London. His uncle, Sir Charles Lock Eastlake PRA (born in 1793), was an earlier Keeper of the National Gallery, from 1843 to 1847, which, today, leads to much confusion between the two men, whose names are only distinguished by the presence or absence of an "e" in their middle names.