Sir Richard Mathias, 1st Baronet (1 June 1863 – 26 October 1942) was a Liberal Party politician in the United Kingdom. He was elected at the December 1910 general election as Member of Parliament (MP) for Cheltenham, but was subsequently unseated on petition. His brother was the Liberal candidate at the resulting by-election in April 1911, but lost by four votes to the Conservative Party candidate, former MP Sir James Agg-Gardner. He was made a baronet on 28 June 1917, of Vaendre Hall, Monmouthshire.