Henry Thickitt (or Thickett) (1872 – 15 November 1920) was a professional footballer and Manager. Born in Hexthorpe, Doncaster he played as a defender primarily for Sheffield United with whom he won the First Division once, the FA Cup twice and gained two caps for England. He then went on to achieve relative success as the manager of Bristol City.

Thickitt started his career as a youngster with Doncaster amateur side Hexthorpe Wanderers before being offered an extended trial as a guest player with Sheffield United in 1891 at the age of seventeen. United opted not to sign him after he appeared in five games that season. Following an injury to their captain Ramsey Grey on 21 March 1891, Thickitt was brought in by Doncaster Rovers for the remainder of that season in the Midland Alliance League. After this, he was offered professional terms at nearby Rotherham Town where he became a regular in the first team and appeared in The Football League.

By 1893 Sheffield United had become one of the top sides in the country but had not forgotten about Thickitt and signed him from Rotherham Town for £30 in November of that year, two seasons after his initial trial. Thickitt was immediately installed as first choice right back for the Bramall Lane club, a position he retained for almost ten years.

Although described at the time as a big, sturdy man he had a surprising turn of speed and this, in conjunction with his tackling and willingness to work hard endeared him to the fans and the club alike. Both he and United enjoyed a spectacularly successful spell during his time there, winning the First Division title in 1898 and finishing runners up on two more occasions, whilst he also gained two FA Cup winners medals in 1899 and 1902 with a runners-up medal sandwiched in between in 1901.

In his later years at the club he began to suffer from injuries but was renowned for playing when he shouldn't have, resulting in a story circulated at the time that he had played in the 1899 FA Cup final swathed in forty yards of bandages and fortified with copious amounts of whiskey! Although the Manchester doctor who had given the story to the press later admitted to have made it up Thickitt's reputation made it easy for supporters to believe. He was also a very moral man, offering to take a pay cut in 1895 because he believed he had missed too many first team games after contracting typhoid fever.

With his career seemingly coming to an end Thickitt eventually transferred to Bristol City in May 1904 where he played on for another season before being appointed manager in 1905.

Thickitt was called up for England in 1899 and made two appearances in the Home Championship, against Wales on 20 March and Scotland on 8 April of that year.

Thickitt played for Bristol City in the 1904–05 season when the club was managed by Sam Hollis. He took over as manager in March 1905 after Hollis departed and steered the club to English football's top flight at the first attempt. The most crucial decision he made was probably the re-signing of Billy Wedlock, who had left the club in 1901. In securing promotion from the English Second Division as champions in 1906, Bristol City won 14 league matches in a row (equalling a record set by Manchester United the previous year and only matched since by Preston North End and Arsenal).