It's not sheffield united as that is younger than sheffield Wednesday which is 1867, it is sheffiled FC a non-league club.
The oldest professional club still in existence is notts county f.c
Used to be called Nottingham f.c
Sheffield F.C. is the oldest football club in England, and the oldest football club in the world. It was founded on October 24, 1857.
SHYAM-STAR is the world oldest professional football club in the world
Queen's Park F.C. are oldest football club in Scotland, founded in 1867.
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Sheffield United
Oldest Sports club in the US is the Oneida Football Club in Boston Mass
Notts County are the oldest football league club and have remained in the league since their formation in 1862. However the oldest football club listed by FIFA is Sheffield FC as they were formed in 1857, however they remain out of the football league.
No Sheffield Wednesday is the oldest club playing football in the world
The Sydney University Football Club.
cray wanderers are the second oldest football club in the working having been around since 1860.
Queen's Park
Cracovia Krakow