William Allen (1870 – 11 September 1945)[1][2] was a politician in Britain who served as a Member of Parliament (MP) from 1892 to 1900, and – after a gap of more than thirty years – from 1931 to 1935.

Allen narrowly lost the two-way contest to his Labour Party opponent Andrew MacLaren.

[4][6] Allen did not stand in 1929,[6] but when he stood as a Constitutionalist/National candidate[7] at the 1931 general election he won the seat from MacLaren.

After the election Allen took the Liberal National whip in the House of Commons.

[8] MacLaren regained the seat, defeating Allen at the 1935 general election.