| Alan O'Donoghue | |
| Fullname: | Denis Aloysius O'Donoghue |
| Birth Date: | 3 June 1891 |
| Birth Place: | Blackwood, Victoria |
| Death Place: | Heidelberg, Victoria |
| Originalteam: | Leopold |
| Height: | 183 cm |
| Weight: | 78 kg |
| Statsend: | 1918 |
| Years1: | 1912 |
| Club1: | Richmond |
| Games Goals1: | 9 (7) |
| Years2: | 1914–1918 |
| Club2: | South Melbourne |
| Games Goals2: | 44 (15) |
| Games Goalstotal: | 53 (22) |
Denis Aloysius "Alan" O'Donognue (3 June 1891 – 10 February 1959) was an Australian rules footballer who played for Richmond and South Melbourne in the VFL.
O'Donognue was both a follower and key position player. He started his career at Richmond but only managed the one season and in 1914 made his debut for South Melbourne. In that year's Grand Final he played as a centre half forward in their losing side. He was a member of South Melbourne's 1918 premiership team though, in what would be his last game of league football he was a centre half back in their five-point win over Collingwood.[1]