| Honorific Prefix: | Major The Right Honourable |
| The Lord Templemore | |
| Honorific Suffix: | JP DL |
| Office: | High Sheriff of County Wexford |
| Term Start: | 1890 |
| Term End: | 1890 |
| Predecessor: | Sir Frederick Hughes |
| Successor: | Robert Westley Hall-Dare |
| Birth Name: | Arthur Henry Chichester |
| Education: | Eton College |
| Parents: | Harry Chichester, 2nd Baron Templemore Laura Caroline Jane Paget |
| Spouse: | |
| Children: | 4 |
| Relations: | Dermot Chichester, 7th Marquess of Donegall |
Arthur Henry Chichester, 3rd Baron Templemore JP DL (16 September 1854 – 28 September 1924), styled The Honourable Arthur Chichester between 1854 and 1906, was an Anglo-Irish peer.
Chichester was born on 16 September 1854. He was the son of Harry Chichester, 2nd Baron Templemore and, his first wife, Laura Caroline Jane Paget. After his mother's death in December 1871, his father married Lady Victoria Ashley-Cooper, daughter of Anthony Ashley-Cooper, 7th Earl of Shaftesbury and Lady Emily Cowper (a daughter of 5th Earl Cowper), in 1873. From his father's second marriage, he had a younger half-sister, Hon. Hilda Caroline Chichester, who married Sir Victor George Corkran.
His paternal grandparents were Arthur Chichester, 1st Baron Templemore and Lady Augusta Paget (a daughter of Field Marshal Henry Paget, 1st Marquess of Anglesey).[1] His maternal grandparents were Sir Arthur Paget and Lady Augusta Fane (a daughter of 10th Earl of Westmorland). His mother Laura was the first cousin of his paternal grandmother Lady Augusta.
He was educated at Eton College, and served as private secretary to R. A. Cross (later Viscount Cross) when he was Home Secretary from 1874 to 1880.
He was a Major in the 3rd Battalion, Royal Irish Regiment, and served as High Sheriff of County Wexford in 1890. The family seat was Dunbrody House near Arthurstown in the south-west of County Wexford. Arthurstown was named for The 1st Earl of Donegall.[2]
Upon the death of his father on 10 June 1906, he succeeded as the 3rd Baron Templemore, of Templemore in County Donegal in the Peerage of the United Kingdom. He served as a Justice of the Peace and Deputy Lieutenant of County Wexford.[3]
On 14 August 1879, Chichester married Evelyn Stracey, a daughter of the Rev. William James Stracey-Clitherow and Maria Diana (Bourchier) Stracey. Before her death on 3 December 1883, they were the parents of:
On 15 July 1885, Chichester married Alice Elizabeth Dawkins, a daughter of Clinton George Augustus Dawkins, Consul-General to Vienna (and brother to Henry Dawkins of Over Norton Park), and Marianne Jane (Robarts) Dawkins. Together, they were the parents of:
Lord Templemore died on 28 September 1924.[6] His widow, the dowager Lady Templemore, died on 30 September 1954.[7]
Through his son Arthur, he was a grandfather of Dermot Chichester (1916–2007), who became the 5th Baron Templemore in 1953, and the 7th Marquess of Donegall (in the Peerage of Ireland) in 1975 upon the death of his distant cousin, Edward Chichester, 6th Marquess of Donegall[8] (being the descendant of the 1st Baron Templemore, son of Lord Spencer Chichester and grandson of Arthur Chichester, 1st Marquess of Donegall).[9]