| Land | Runde | ⊝ Age | Teilnahmen |
|---|
| AC Florenz | Italien | League Stage | 25,6 | 3 |
| AEK Athen | Griechenland | League Stage | 28,5 | 0 |
| Aberdeen | Schottland | League Stage | 24,1 | 1 |
| Alkmaar | Niederlande | League Stage | 23,9 | 3 |
| BK Häcken | Schweden | League Stage | 25,5 | 1 |
| Basaksehir | Türkei | Play-off | 26,3 | 2 |
| Besiktas | Türkei | Play-off | 27,3 | 1 |
| Bröndby IF | Dänemark | Play-off | 26,0 | 0 |
| Celje | Slowenien | League Stage | 26,4 | 1 |
| Cluj | Rumänien | Play-off | 26,8 | 3 |
| Craiova | Rumänien | League Stage | 26,0 | 0 |
| Crystal Palace | England | League Stage | 28,7 | 0 |
| D. Tirana | Albanien | Play-off | 27,2 | 0 |
| Differdingen | Luxemburg | Play-off | 26,9 | 0 |
| Dynamo Kiev | Ukraine | League Stage | 26,0 | 0 |
| FC Noah | Armenien | League Stage | 28,1 | 1 |
| FK Arda Kurdzh | Bulgarien | Play-off | 27,7 | 0 |
| FK Rigas Futbo | Lettland | Play-off | 24,9 | 1 |
| Fredrikstad | Norwegen | Play-off | 25,1 | 0 |
| Genf | Schweiz | Play-off | 26,5 | 2 |
| Grodno | Weißrussland | Play-off | 28,6 | 0 |
| Gyori ETO FC 2 | Ungarn | Play-off | 24,9 | 0 |
| Hamrun Spart | Malta | League Stage | 26,2 | 0 |
| Hibernian FC | Schottland | Play-off | 26,5 | 0 |
| Jagiellonia | Polen | League Stage | 24,6 | 1 |
| KF Drita | International | League Stage | 26,8 | 1 |
| KS Rakow Czest | Polen | League Stage | 25,4 | 0 |
| Kopavogur | Island | League Stage | 26,5 | 1 |
| Kuopio PS | Finnland | League Stage | 24,4 | 0 |
| L. Warschau | Polen | League Stage | 26,0 | 2 |
| Larnaka | Zypern | League Stage | 27,5 | 1 |
| Lausanne | Schweiz | League Stage | 23,6 | 0 |
| Levski Sofia | Bulgarien | Play-off | 25,2 | 0 |
| Lincoln FC | Gibraltar | League Stage | 28,8 | 2 |
| Linfield | Nordirland | Play-off | 24,9 | 0 |
| Mainz | Deutschland | League Stage | 26,6 | 0 |
| Mostar | Bosnien-Herzegowina | League Stage | 26,5 | 2 |
| O. Ljubljana | Slowenien | Play-off | 24,9 | 2 |
| Olomouc | Tschechien | League Stage | 25,9 | 0 |
| Om. Nikosia | Zypern | League Stage | 26,2 | 2 |
| Ostrava | Tschechien | Play-off | 25,9 | 0 |
| Polessya | Ukraine | Play-off | 25,2 | 0 |
| Poznan | Polen | League Stage | 24,7 | 1 |
| RSC Anderlecht | Belgien | Play-off | 24,1 | 1 |
| Rapid Wien | Österreich | League Stage | 24,7 | 2 |
| Riga FC | Lettland | Play-off | 26,4 | 1 |
| Rijeka | Kroatien | League Stage | 24,9 | 1 |
| Rosenborg BK | Norwegen | Play-off | 25,3 | 0 |
| SK SLovan | Slowakei | League Stage | 27,5 | 3 |
| SS Virtus | San Marino | Play-off | 31,5 | 0 |
Insgesamt nehmen 60 Mannschaften teil. The number of participations refers to tournament participations before the tournament. Neman Grodno, Rayo Vallecano, KS Dinamo Tirana, Crystal Palace, Fredrikstad FK, Hibernian Edinburgh, Wolfsberger AC, SS Virtus, KS Rakow Czestochowa, FK Arda Kurdzhali, FC Linfield Belfast, FC Shelbourne, CD Santa Clara, FC Differdingen 03, AEK Athen, Shakhtar Donetsk, Polessya, Hamrun Spartans, Gyori ETO FC 2, Banik Ostrava, CS Universitatea Craiova, Rosenborg Trondheim, 1. FSV Mainz 05, Levski Sofia, Lausanne Sports, Bröndby IF, Racing Straßburg, Samsunspor, Sigma Olomouc, Dynamo Kiev und Kuopio PS are participating in der Conference League for the first time.
Conference League
