Lancelot Walker (1829 – 19 May 1907) was a 19th-century Member of Parliament in New Zealand.
He represented the Akaroa electorate from the 1863 by-election after the resignation of Augustus White to 1866, then from 1866 the Ashley electorate until he resigned in 1867. On 15 May 1885, he was appointed to the New Zealand Legislative Council, where he served until his death on 19 May 1907.