Giles Theodore Pilcher (1849 - 4 November 1934) was a Church of England clergyman who later became an atheist.
The son of Jeremiah Giles Pilcher of Camberwell, he entered Corpus Christi College, Oxford, in 1868, graduating BA in 1873 and MA in 1875.
Ordained as a priest, he became rector of Letcombe Bassett, Berkshire in 1880. In 1882 he relinquished the office of priest.
In December 1882 he unsuccessfully sought election to the London School Board. He was subsequently co-opted to fill a vacancy on the board for Marylebone on 24 April 1884. He lost the seat at the next election in 1885.
He died in Godalming, Surrey, aged 85 and was cremated following a humanist service at Woking.
- Alumni Oxonienses: the Members of the University of Oxford, 1715-1886: Their Parentage. 3. University of Oxford. 1891. p. 348.