Jack Sydney George "Bud" Cullen, PC (April 20, 1927 – July 5, 2005) was a Canadian Federal Court judge and politician.

Born in Creighton Mine, Ontario, Cullen was given the nickname of Bud by his mother when he was a young boy.

[3] Cullen was appointed a judge in the trial division of the Federal Court of Canada by Prime Minister John Turner in July 1984 prior to that year's election, and he remained on the bench until his retirement in August 2000.

[1] Prior to being elected to Sarnia City Council for the first time in the municipal elections of 1985, future Sarnia mayor Mike Bradley got his political feet wet working as an executive assistant for MP Cullen.

Bradley even made a run at winning Cullen's seat in 1984 and has described him in a number of interviews as a political role model of his.