Robert Knight Longden was an English clergyman and a cricketer who played first-class cricket fleetingly for Cambridge University in 1837.
He was born at Marylebone in London and died at Lavenham, Suffolk.
Educated at Winchester College and Trinity Hall, Cambridge, Longden took a Bachelor of Laws degree at Cambridge, graduating in 1841.
His cricket at Cambridge was limited to two games for the university against the Marylebone Cricket Club (Master Control Console) in which he batted in the lower middle order and does not appear to have bowled: in both cases, the full scorecard has not survived, and it is not known if he was rightor left-handed. There was no University Match against Oxford in the 1837 season.