I'm not sure that this qualifies as a 'veteran', but the Royal Navy ship HMS Queen (1839 - 1871) had a tortoise mascot called Timothy who was present on board during the seige of Sebastapol in 1854 and died in 2004 aged about 160. If you're talking about humans, I've looked and looked and I'm afraid I haven't a clue. Sorry.

I doubt that there would have been records kept them as they are now. If you consider, however, that most armies employed drummer boys as young as 10 years old, and that the Crimean War ended in 1856, that would make a child born in 1846. If that child lived to 100 years old (highly unlikely as they were cannon fodder, but not out of the question theoretically) then it is possible that survivors of the Crimean conflict were alive well into the first half of the 20th century and could have even lasted into the second half of it. However, I have never seen any records of such. The soldiers tended not to have long lives. (I have many soldiers on one of my New Zealand lines, one of whom was a drummer boy at Corunna and got the Waterloo Medal, others who fought in the 1840s in India. Only one lived past 1900, to 1909, and he was born in 1814.) Just found this: HE WAS AT BALAKLAVA.; Death of Barney McKernan, a Survivor of the Famous Charge. March 15, 1897, Wednesday Page 7, 345 words PHOENIXVILLE, Penn., March 14. -- Barney McKernan, a survivor of the Light Brigade which was made famous by the charge at Balaklava during the Crimean war, died at the home of his daughter, in this place, last night, aged seventy-two years. http://query.nytimes.com/gst/abstract.html?res=9503E7D91E3DE433A25756C1A9659C94669ED7CF Edwin Hughes 'Balaclava Ned' was the last survivor of the infamous Charge of the Light Brigade. Born:12 DEC 1830 Place of Birth: Wrexham Biography: On October 25 1854 he rode in the infamous Charge of the Light Brigade, which occurred at the Battle of Balaclava during the Crimean War. British forces mounted an attack on the Russian artillery which led to the deaths of 272 of the 673 British soldiers involved. The disastrous attack was immortalised in Tennyson's poem The Charge of the Light Brigade. Edwin Hughes was born in Mount Street, Wrexham, the son of a tinplate worker. He became a shoemaker until 1852 when he joined the 13th Light Dragoons as a Private. Hughes was injured in the charge and his horse was killed. However he survived and continued to serve in the Crimean campaign until being discharged in 1873. He then enlisted in the Worcestershire Yeomanry Cavalry, serving with them until 1886. He married and had two sons and two daughters. After the death of his wife he went to live with his unmarried daughter, Mary, in Blackpool. In 1923 he became the last survivor of the Charge of the Light Brigade. He died in Blackpool in 1927. Though he had moved away from Wrexham he often returned to the town and could be persuaded to tell the tale of his historic experience. In October 1992, on the anniversary of the Charge, a plaque was placed on the house in Mount Street where Hughes was born. http://www.bbc.co.uk/wales/northeast/guides/halloffame/historical/edwin_hughes.shtml Here are some other survivors: http://www.royalarmouries.org/extsite/view.jsp?sectionId=1579 Penrith's Crimea War Hero Penrith museum owns the medals and other memorabilia of William Pearson (1826-1909), the Crimea War survivor. The town has done much to ensure that the man and his bravery should not be forgotten. As long ago as 1894 townsfolk marked the 40th anniversary of the "Charge of the Light Brigade" by acquiring a life size photograph of Pearson, who was then still alive. Still in its elaborate frame it is now owned by the Museum. He has the distinction of having a corner of the town named after him 'Pearson Court' and a plaque is affixed to the property in King Street formerly the Mitre Hotel where he was born in 1826. He was brought up in North Westmorland and was a leather dresser before running away to enlist in the 4th Light Dragoons in 1848, at Westminster. He was serving in Ireland when the regiment received orders for the Crimea. http://www.eden.gov.uk/main.asp?page=3582 Yesterday, on the 152nd anniversary of the Charge of the Light Brigade, the King’s Royal Hussars made amends to Trooper Thomas Warr, who survived the Russian guns to die of old age in his home town of Dorchester in 1916. http://forums.canadiancontent.net/news/52103-light-brigade-survivor-honoured-old.html 1927 seems t0 be the winner.

The last known living veteran of the Crimean War appears to be Colonel Rookes Crompton, born 31 May 1845, died 15 February 1940. He served as a Royal Navy cadet on HMS Dragon at the front during the Siege of Sevastopol, earning two campaign medals before he turned 12: http://en.wikipedia.org/wiki/R._E._B._Crompton http://nq.oxfordjournals.org/cgi/issue_pdf/frontmatter_pdf/180/6.pdf

previous answers excellent but i believe and are certain that britain had survivors of the crimean war living beyond 1927. longevity for our veterans not unknown it seems as british veterans in the crimean, boer and first world war outlived there allies and enemies alike. i am currently trying to source evidence previously read to add as proof. bear in mind please that the last survivor of the american civil war {1861-1865} lived until 1959!