William Shepherd Allen (22 June 1831 – 15 January 1915) was an English Liberal politician.

Another son, Colonel Sir Stephen Allen, (1882–1964) was a New Zealand lawyer, farmer, local body politician, and mayor of Morrinsville.

He held this seat until 1886 when he broke with his party over it's stance on Home Rule for Ireland and became a Liberal Unionist.

In 1890 he was elected MP for Te Aroha in New Zealand, but he was unseated by petition due to an irregularity created by his agent.

He served as member of the Piako County Council from 1895 to 1896 before resigning to travel to England.