| Karel Knejzlík | |
| Birth Date: | 1996 10, df=yes |
| Birth Place: | Stráž pod Ralskem, Czech Republic |
| Height: | 1.83 m |
| Position: | Left-back |
| Currentclub: | Přepeře |
| Clubnumber: | 7 |
| Youthclubs1: | Stráž pod Ralskem |
| Youthclubs2: | Slovan Liberec |
| Years1: | 2016–2020 |
| Clubs1: | Slovan Liberec |
| Caps1: | 4 |
| Goals1: | 0 |
| Years2: | 2016–2017 |
| Clubs2: | → Varnsdorf (loan) |
| Caps2: | 39 |
| Goals2: | 1 |
| Years3: | 2017 |
| Clubs3: | → Hradec Králové (loan) |
| Caps3: | 7 |
| Goals3: | 1 |
| Years4: | 2019–2020 |
| Clubs4: | → Opava (loan) |
| Caps4: | 0 |
| Goals4: | 0 |
| Years5: | 2020 |
| Clubs5: | Arsenal Česká Lípa |
| Years6: | 2021– |
| Clubs6: | Přepeře |
| Nationalyears1: | 2011–2012 |
| Nationalteam1: | Czech Republic U16 |
| Nationalcaps1: | 10 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 2014 |
| Nationalteam2: | Czech Republic U18 |
| Nationalcaps2: | 5 |
| Nationalgoals2: | 1 |
| Nationalyears3: | 2017–2018 |
| Nationalteam3: | Czech Republic U21 |
| Nationalcaps3: | 7 |
| Nationalgoals3: | 1 |
| Club-Update: | 19:25, 24 May 2023 (UTC) |
Karel Knejzlík (born 23 October 1996) is a professional Czech footballer, who plays as a left-back for FK Přepeře.
He started playing football at FK Stráž pod Ralskem before moving to the Slovan Liberec youth setup.[1]
He started his professional career at Liberec. He went on an 18-month loan to the Czech National Football League side Varnsdorf in January 2016[2] and made his competitive debut in their 0–0 draw at Ústí nad Labem on 11 March. He scored his first league goal on 3 March 2017 in Varnsdorf's 1–0 win at České Budějovice. Upon his return to Liberec, he made two league appearances in 2017 before going on loan to another National Football League club, Hradec Králové.
He represented the Czech Republic in the Under-16, Under-18 and Under-21 youth categories.