| Alf Ihlen | |
| Birth Date: | 30 June 1900 |
| Birth Place: | Skedsmo, Norway |
| Occupation: | Industrialist |
| Father: | Nils Claus Ihlen |
| Relatives: | Joakim Ihlen (brother) |
Alf Ihlen (30 June 1900 – 6 April 2006) was a Norwegian industrialist.
He was born in Skedsmo, as a son of engineer and politician Nils Claus Ihlen and Henriette Marie Lund. He was co-manager of the workshop Strømmens Værksted for about fifty years, along with his brother Joakim Ihlen. The two brothers developed their company into a world leading producer of aluminium based vehicles in the 1930s.[1] [2]