Henry Lowther, 3rd Earl of Lonsdale (27 March 1818 – 15 August 1876) was a British nobleman and Conservative politician.

In 1868, he succeeded his uncle William in his Lord Lieutenancies, and in 1872 as Earl of Lonsdale.

He was educated at Westminster School and Trinity College, Cambridge and in 1841 he joined the 1st Life Guards.

From 1847 until his elevation to the peerage and ascension to the House of Lords in 1872, Lowther served as a Member of Parliament for West Cumberland.

[2] They had six children:[3] Lord Lonsdale died after an attack of pneumonia on 15 August 1876 at the age of 58 and was succeeded in his titles by his eldest son, St George Henry Lowther, who became the 4th Earl of Lonsdale at age 23.