His son, Conor, was a councillor from 1991–99 and his brother, Johnny, lost his seat in the 2004 local elections ending the McGahon family's 108 consecutive year representation on Dundalk Town and Louth County Council.
He attended NUI Galway (then UCG) where he became Auditor of the Law Society and graduated in 1986 with a BA in Legal & Political Science and again in 1988 with an LLB.
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He headed the poll in his ward when elected to the seat vacated by his father Brendan McGahon, a controversial Teachta Dála (TD) for the constituency of Louth from 1982 until 2002 and became the youngest local politician in the Republic of Ireland when first elected in 1991 and the fifth consecutive member of his family to sit on the County Council.
Conor Cruise O'Brien | Charles O'Conor | Conor O'Clery | Conor Oberst | Conor Myles John O'Brien, 18th Baron Inchiquin | Conor Murphy | Conor | Sir Nicholas Roderick O'Conor | Conor O'Shea | Conor O'Brien, 18th Baron Inchiquin | Conor McPherson | Conor Jackson | Conor Cummins | Book of O'Conor Don | William Conor | Herbert R. O'Conor | Herbert O'Conor | Edward Conor Marshall O'Brien | Conor Sinnott | Conor Shanosky | Conor Oberst (album) | Conor Mitchell | Conor McNicholas | Conor McGahon | Conor Maynard | Conor MacNeill (programmer) | Conor MacNeill | Conor Lenihan | Conor Gough | Conor Counihan |