After William Wordsworth's death in 1850, and Samuel Rogers' refusal, Tennyson was appointed to the position of Poet Laureate; Elizabeth Barrett Browning and Leigh Hunt had also been considered. He held the position until his own death in 1892, by far the longest tenure of any laureate before or since. Tennyson fulfilled the requirements of this position by turning out appropriate but often uninspired verse, such as a poem of greeting to Princess Alexandra of Denmark when she arrived in Britain to marry the future King Edward VII. In 1855, Tennyson produced one of his best-known works, "The Charge of the Light Brigade", a dramatic tribute to the British cavalrymen involved in an ill-advised charge on 25 October 1854, during the Crimean War. Other esteemed works written in the post of Poet Laureate include Ode on the Death of the Duke of Wellington and Ode Sung at the Opening of the International Exhibition.
Tennyson initially declined a baronetcy in 1865 and 1868 (when tendered by Disraeli), finally accepting a peerage in 1883 at Gladstone's earnest solicitation. In 1884 Victoria created him Baron Tennyson, of Aldworth in the County of Sussex and of Freshwater in the Isle of Wight. He took his seat in the House of Lords on 11 March 1884.
Tennyson also wrote a substantial quantity of unofficial political verse, from the bellicose "Form, Riflemen, Form", on the French crisis of 1859 and the Creation of the Volunteer Force, to "Steersman, be not precipitate in thine act/of steering", deploring Gladstone's Home Rule Bill.
Virginia Woolf wrote a play called Freshwater, showing Tennyson as host to his friends Julia Margaret Cameron and G.F. Watts.
Tennyson was the first to be raised to a British peerage for his writing. A passionate man with some peculiarities of nature, he was never particularly comfortable as a peer, and it is widely held that he took the peerage in order to secure a future for his son Hallam.
Thomas Edison made sound recordings of Tennyson reading his own poetry, late in his life. They include recordings of The Charge of the Light Brigade, and excerpts from "The splendour falls" (from The Princess), "Come into the garden" (from Maud), "Ask me no more", "Ode on the death of the Duke of Wellington", "Charge of the Light Brigade", and "Lancelot and Elaine"; the sound quality is as poor as wax cylinder recordings usually are.
Towards the end of his life Tennyson revealed that his "religious beliefs also defied convention, leaning towards agnosticism and pandeism": Famously, he wrote in In Memoriam: "There lives more faith in honest doubt, believe me, than in half the creeds." [The context directly contradicts the apparent meaning of this quote.] In Maud, 1855, he wrote: "The churches have killed their Christ". In "Locksley Hall Sixty Years After," Tennyson wrote: "Christian love among the churches look'd the twin of heathen hate." In his play, Becket, he wrote: "We are self-uncertain creatures, and we may, Yea, even when we know not, mix our spites and private hates with our defence of Heaven". Tennyson recorded in his Diary (p. 127): "I believe in Pantheism of a sort". His son's biography confirms that Tennyson was not an orthodox Christian, noting that Tennyson praised Giordano Bruno and Spinoza on his deathbed, saying of Bruno, "His view of God is in some ways mine", in 1892.
Tennyson continued writing into his eighties. He died on 6 October 1892 at Aldworth, aged 83. He was buried at Westminster Abbey. A memorial was erected in All Saints' Church, Freshwater. His last words were; "Oh that press will have me now!". He left an estate of £57,206.
He was succeeded as 2nd Baron Tennyson by his son, Hallam, who produced an authorised biography of his father in 1897, and was later the second Governor-General of Australia.