Sir John Stephen Barrington Simeon, 4th Baronet DL (31 August 1850 – 1909) was one of the two Members of Parliament^{[lower-alpha 1]} for Southampton at the end of the 19th century and the start of the 20th century.

He was born at Swainston Manor^{[lower-alpha 2]} in West Wight on 31 August 1850 and succeeded his father, the 3rd baronet, in 1870.^[1][2] He served as Ensign in the Rifle Brigade until he married Isabella Mary, daughter of the Hon Ralph Heanage Dutton, in 1872. The marriage was childless.^[1] In 1880 he became private secretary to the Rt Hon John Bright, MP, and entered parliament himself in 1895 as a Liberal Unionist. Shortly after his election he commissioned a private railway station^[3] at Watchingwell, some four miles (6 km) west of Newport.^[4] On 5 December 1903 he was appointed Honorary Colonel of the Southampton-based 1st Hampshire Royal Garrison Artillery (Volunteers).^[1][5]

Re-elected in 1900, Simeon left the House of Commons in 1906 and died three years later. He was succeeded as 5th baronet by his brother, Edmund Charles (1855–1915).^[1]

Coat of arms of Sir John Simeon, 4th Baronet

Crest A fox passant-reguardant Proper in the mouth a trefoil slipped Vert. Escutcheon Per fess Sable and Or a pale counterchanged in chief an ermine spot of the first between two trefoils slipped of the second and in base a like trefoil between two like ermine spots. Supporters Dexter a fox reguardant Proper in the mouth a trefoil slipped Vert, sinister a lion Gules ducally crowned Or. Motto Serviendo; Nec Temere Nec Timide[6]