Thomas Arnold Herbert (1863 – 22 November 1940) was a British Liberal Party politician and barrister.
He was a son of Professor Thomas Martin Herbert, Professor of Philosophy and Church History at the Lancashire Independent College, whose mother was sister of Ann and Jane Taylor, authors of Twinkle Twinkle Little Star.
In 1890 he was the winner of Yorke Prize of Cambridge University for 'The History of the Law of Prescription in England'.
Standing for the first time, he gained Wycombe from the Conservative at the 1906 General Election.
He served just one parliamentary term before defending his seat at the January 1910 General Election, when the Conservative Sir Charles Alfred Cripps won the seat with a majority of 17%.