| Current Season: | 2024 1. Liga ragby XV |
| Sport: | Rugby union |
| Founded: | 1993 |
| Teams: | 7 |
| Promotion: | Extraliga ragby XV |
| Levels: | 2 |
| Website: | Czech Rugby Union: 1. Liga ragby XV |
The 1. Liga ragby XV is the second level of domestic club rugby union in the Czech Republic, below the first division, the Extraliga ragby XV. There is also one club from Slovakia in the league.
The season runs from mid-September to the end of May.
The league started out as the Druhá Liga (Second League), but was renamed the První Liga (First League) in the 1999-2000 season. For sponsorship reasons it has been called KB První Liga until the 2015/16 season.
2024 season
| Club | Full name | City | Stadium | |
|---|---|---|---|---|
| RC Bystrc | Rugby Club Brno Bystrc | Brno | N/A | |
| RK Petrovice | Ragby Klub Petrovice | Petrovice (Prague) | N/A | |
| RC Přelouč | Rugby Club Přelouč | Přelouč | Rugbyové hřiště PARKHEM | |
| RC Donau | Rugby Union Donau Wien | Vienna, Austria | Donau Rugby Park | |
| TJ Sokol Mariánské Hory | Tělocvičná jednota Sokol Mariánské Hory | Mariánské Hory (Ostrava) | N/A | |
| RC Říčany B | RC Mountfield Říčany | Říčany | Stadion Josefa Kohouta | |
| Rugby Club Havířov | Havířov | Sportovní hala Slavie | ||
| RC Šumava Nýrsko | Rugby Šumava Nýrsko | Nýrsko | hřiště v Nýrsku |
| Year | Champion | ||
| 1993 | |||
| 1994 | |||
| 1995 | |||
| 1996 | |||
| 1997 | RC Zlín | ||
| 1998 | RC Zlín | ||
| 1999 | |||
| 2000 | |||
| 2001 | RC Havířov | ||
| 2002 | RC Havířov | ||
| 2003 | RC Havířov | ||
| 2004 | RC Slavia Prague | ||
| 2005 | RC Bystrc | ||
| 2006 | |||
| 2007 | Praga Rugby nebo RC Zlín | ||
| 2008 | RC Bystrc | ||
| 2009 | |||
| 2010 | RC Havířov | ||
| 2011 | RC Bystrc | ||
| 2012 | RC Bystrc |