The Reverend Frederick Thatcher (1814 – 19 October 1890) was an English and New Zealand architect and clergyman. He was born at Hastings to a long-established Sussex family. He practised as an architect in London from 1835 and was one of the earliest associates of the Institute of British Architects, being admitted in 1836. He designed the workhouse in Battle, East Sussex in 1840. He married, first, in 1840, Elizabeth Watt (died 1842), and second, in 1849, Caroline Wright of New Plymouth. One son, Ernest, was born of the second marriage.