Sir William Henry Hornby, 1st Baronet, DL (29 August 1841 – 22 October 1928), usually known as Harry Hornby, was an English industrialist and Conservative Party politician from Blackburn in Lancashire. He sat in the House of Commons from 1886 to 1910 but is notable for never speaking, or attempting to speak, in Parliament throughout his 24-year career there.
Hornby was the fourth son of William Henry Hornby, who had been Mayor of Blackburn and also served as Member of Parliament for the town; his younger brother was 'Monkey' Hornby, the Lancashire and England cricket captain. He had little interest himself in a political career but was proud of his family's record and noted the affection many in the local community felt for them. He was persuaded to enter politics as a member of the School Board when selected by the Church of England in 1871, and was subsequently voted chairman unanimously. In 1873 he was elected to the Town Council with a majority of one vote, prompting the Church to ring its bells. The year 1876 was 25th anniversary of Blackburn's incorporation and Hornby, as the son of the first Mayor, was persuaded to accept the office to mark the occasion. He resigned from the council in 1880 when his lack of electioneering was questioned.
At the 1886 general election, Hornby was selected as the Conservative candidate without formality and with his confession that he had not wished to stand. Nevertheless, he was elected. Hornby was acutely aware that he was no good at making speeches, and was reluctant even to speak in Blackburn even though the townsfolk understood and accepted his difficulty. He was re-elected in subsequent general elections, winning more votes than his running-mate in the two-member constituency.
In November 1896 Hornby wrote to the Conservative leader in Blackburn offering his resignation; as a result a delegation was organised to persuade him to change his mind. Some suspected that the fact that the other Blackburn MP William Coddington had recently been awarded a Baronetcy may have influenced Hornby's decision, and pressure was put on the Prime Minister to follow up. In the New Year's Honours list of 1899, Hornby was himself created a Baronet; flags were hung around the town's public buildings to mark the award. In November 1901 Hornby was also elected Mayor of Blackburn for the following year.