The Ligue Européenne de Natation LEN is the governing body for Water polo in Europe. It organises three main active club competitions: the top tier LEN Champions League (formerly European Cup), the LEN Euro Cup (second tier competition), the LEN Challenger Cup (third tier competition) and the LEN Super Cup. There is also a former LEN club competition such as the LEN Cup Winners' Cup existed between the years 1974 to 2003. The Italian side Pro Recco have won a record total of 20 titles in LEN Europe club competitions, seven more than HAVK Mladost from Croatia.

The Italian clubs have won the most titles (46), ahead of clubs from Hungary (32).

The following table lists all the men's clubs that have won at least one LEN Europe club competition, and is updated as of June 4, 2022 (in chronological order).

Key

List of LEN club competition winners

Rk.	Club	Country	LCL	LEC	LCC	LCW	LSC	Total
1	Pro Recco	Italy	11				9	20
2	HAVK Mladost	Croatia	7	1		2	3	13
3	VK Partizan	Serbia	7	1		1	2	11
=	Ferencváros	Hungary	1	2		4	4	11
5	Jug Dubrovnik	Croatia	4	1			2	7
=	CN Posillipo	Italy	3	1		2	1	7
=	Vasas SC	Hungary	2	1		3	1	7
=	Waterpolis Pescara	Italy	1	1		3	2	7
9	Spandau 04	Germany	4				2	6
=	CSK VMF Moscow	Russia	1			2	3	6
11	Újpest	Hungary	1	3			1	5
12	CN Catalunya	Spain	1			1	2	4
=	POŠK	Croatia	1			2	1	4
=	CN Barcelona	Spain	1	2			1	4
=	AN Brescia	Italy		4				4
16	Olympiacos	Greece	2				1	3
=	OSC Budapest	Hungary	2				1	3
=	Szolnok SC	Hungary	1	1			1	3
=	RN Savona	Italy		3				3
20	Jadran Split	Croatia	2					2
=	Honvéd SE	Hungary	1				1	2
=	Primorac Kotor	Montenegro	1				1	2
=	MGU Moscow	Russia	1			1		2
=	Crvena zvezda	Serbia	1				1	2
=	Barceloneta	Spain	1				1	2
=	Racing Roma	Italy		1		1		2
=	Dynamo Moscow	Russia				2		2
28	Canottieri Napoli	Italy	1					1
=	VK Bečej	Yugoslavia	1					1
=	Sintez Kazan	Russia		1				1
=	Szeged	Hungary		1				1
=	Shturm Chekhov	Russia		1				1
=	Cattaro	Montenegro		1				1
=	Radnički Kragujevac	Serbia		1				1
=	Spartak Volgograd	Russia		1				1
=	CN Sabadell	Spain		1				1
=	CN Marseille	France		1				1
=	GS Apollon Smyrnis	Greece			1			1
=	RN Florentia	Italy				1		1
=	Korčulanski PK	Yugoslavia				1		1
=	VK Mornar	Yugoslavia				1		1
=	RN Arenzano	Italy				1		1
=	NC Vouliagmeni	Greece				1		1

The following table lists all the countries whose clubs have won at least one LEN competition, and is updated as of June 4, 2022 (in chronological order).

List of LEN club competition winners by country

Rk.	Nations [a]	LCL	LEC	LCC	LCW	LSC	Total
1	Italy	16	10		8	12	46
2	Hungary	8	8		7	9	32
3	Yugoslavia	13			6	3	22
4	Croatia	7	2		1	3	13
5	Spain	3	3		1	4	11
6	Soviet Union	2			4	3	9
7	Germany [b]	4				2	6
=	Serbia	2	1			3	6
9	Greece	2		1	1	1	5
=	Russia		3		1		4
11	Montenegro	1	1			1	3
12	Serbia and Montenegro		1				1
=	France		1				1

• LEN Official Website.