| Karolis Jasaitis | |
| Birth Date: | 1982 11, df=yes |
| Birth Place: | Vilnius, Lithuanian SSR |
| Position: | Midfielder |
| Youthyears1: | –1999 |
| Youthclubs1: | FK Žalgiris |
| Years1: | 2000 |
| Years2: | 2001–2005 |
| Years3: | 2006–2008 |
| Years4: | 2009–2010 |
| Years5: | 2011 |
| Years6: | 2012 |
| Years7: | 2012–2017 |
| Clubs5: | FC Nizhny Novgorod |
| Clubs6: | REO Vilnius |
| Clubs7: | Frøya FK |
| Caps1: | 26 |
| Caps2: | 77 |
| Caps3: | 54 |
| Caps4: | 28 |
| Caps5: | 0 |
| Goals1: | 1 |
| Goals2: | 9 |
| Goals3: | 6 |
| Goals4: | 4 |
| Goals5: | 0 |
| Nationalyears1: | 2002 |
| Nationalteam1: | Lithuania |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
| Pcupdate: | 14:25, 31 May 2012 (UTC) |
| Ntupdate: | 7 April 2004 |
Karolis Jasaitis (born 1 November 1982) is a former Lithuanian football player.
In 2006, he made a brief appearance for the Lithuanian national team in a friendly against Andorra, but was injured after just 2 minutes. The broken leg he sustained had kept him out of action for 6 months.