| Atli Knútsson | |
| Fullname: | Atli Knútsson |
| Birth Date: | 14 March 1975 |
| Birth Place: | Iceland |
| Position: | Goalkeeper |
| Years1: | 1991–1995 |
| Caps1: | 3 |
| Goals1: | 0 |
| Years2: | 1996 |
| Caps2: | 4 |
| Goals2: | 0 |
| Years3: | 1997–2001 |
| Caps3: | 78 |
| Goals3: | 0 |
| Years4: | 2002 |
| Caps4: | 6 |
| Goals4: | 0 |
| Years5: | 2003–2004 |
| Caps5: | 3 |
| Goals5: | 0 |
| Years6: | 2005 |
| Caps6: | 11 |
| Goals6: | 0 |
| Nationalyears1: | 1992 |
| Nationalcaps1: | 5 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 1994 |
| Nationalcaps2: | 6 |
| Nationalgoals2: | 0 |
| Nationalyears3: | 2002 |
| Nationalcaps3: | 1 |
| Nationalgoals3: | 0 |
Atli Knútsson (born 14 March 1975) is an Icelandic former footballer who played as a goalkeeper. He won his only senior cap for the Iceland national football team on 10 January 2002, coming on as a half-time substitute for Árni Gautur Arason in the 0–1 defeat to Saudi Arabia.