Oadby & Wigston
Oadby 67
Oadby Academicals
Oadby Boys Club '93
Oadby Boys Club Old Boys
Oadby Construction
Oadby Imperial (see Oadby Town)
Oadby Owls
Oadby Rangers
Oadby Royal British Legion
Oadby St. Peters
Oadby Town
Oadby United
Oadby United Methodists
Oadby Working Mens Club
Oadby Wyvern
Oak Amateurs
Oakfield Park Rangers
Oakham Athletic
Oakham Imperial
Oakham Park
Oakham Rovers (1897-1898)
Oakham Rovers (1947-1971)
Oakham Swifts
Oakham Town (1949-1983)
Oakham Town (1991-1996)
Oakham United
Oaks Dairy
Oaks Parish Church
Oaks Red White & Blue
Oakthorpe Albion
Oakthorpe Athletic
O'Briens Ins
OEM Harriers
Offset
Old Aylestone
Old Aylestone Athletic
Old Boys
Old Crown
Old Dalby Coronation (see Melton Coronation)
Old English Gentlemen United
Old Fosse Boys
Old Hare
Old Inn Littlethorpe
Old Lancastrians
Old Loughburians
Old Manor Inn
Old Narborians
Old Newtonians
Old Plough (see Birstall Stamford)
Old Plough Birstall
Old Richardians
Old Robin Hood
Old Smythonians
Old Wyverns
Oliver Shoes 86
Olympic
Olympic Mills (see Olympic Sports)
Olympic Sports
Ontrapo United
Osbaston United
Osberstone
Osgathorpe Victoria
Our Lady's Eagles
Outlook (see Outlook Old Boys)
Outlook Old Boys
Overseal
Overseal Institute
Overseal PM
Overseal United
Owl & Pussycat
Oxendon
Oxford Rovers
Oxford Street BC
Oxford Street YM Institute
Oxlea
Oxylene