Cornelius Duggan (1923 - 22 December 1996), known as Nealie Duggan, was an Irish Gaelic footballer who played for club sides Urhan, St. Patrick's and Lees, divisional side Beara, at inter-county level with the Cork senior football team and with Munster.
He consecutive Beara Junior Championship titles with Urhan in 1943-44, by which time he had also been added to the Cork senior football team.
Duggan won his first Munster Championship title in 1943 and, in spite of being included on the team at the start of the 1945 provincial campaign, he was later suspended for allegedly playing illegally in Kerry.
The suspension cost him an All-Ireland medal as Cork won that year's title after a defeat of Cavan.
The ultimate success eluded him as Cork suffered back-to-back All-Ireland final defeats to Galway and Louth, with Duggan captaining the team on the second occasion.