William Wrey Hartopp (22 April 1836 – 20 July 1874) was an English first-class cricketer and British Army officer.

[3] Aged 18, Hartopp served in the Crimean War and took part in the Charge of the Heavy Brigade at Balaclava in October 1854, during which he was severely wounded in the leg.

[4][5] He was promoted to the rank of lieutenant in December 1854, while from August 1855 he served with the Royal Horse Guards.

[4] He purchased the rank of captain with the Royal Horse Guards in April 1859,[6] before retiring from active service in August 1871.

While out fishing on 20 July 1874, Hartopp was killed in an accident,[8] with his body found wrapped around a tree having apparently fallen over a stile.