|Full name||John B.•Maguire|
|Affiliations||Cambridgeport Gymnasium, Cambridgeport (USA)|
Little is known about John Maguire, other than he finished fourth in the Boston Marathon in both 1899 and 1900. On both occasions he was affiliated to the Cambridgeport Gymnasium in Massachusetts.
|Games||Discipline (Sport) / Event||NOC / Team||Pos||Medal||Nationality||As|
|1900 Summer Olympics||Athletics||GBR||IRL||John Maguire|
|Marathon, Men (Olympic)|