2009–10 Országos Bajnokság I (men's water polo)

OB I
Season	2009–10
Champions	Vasas (17th title)
Euroleague	TEVA-VasasPlaket; ZF-Eger; Szeged Beton
LEN Cup	FTC-Fisher Klíma; Domino Honvéd
Top goalscorer	dr. Tamás Molnár; (69 goals)
	← 2008–09 2010–11 →

2009–10 Országos Bajnokság I (men's water polo) (known as the Vodafone férfi OB I osztályú Országos Bajnokság for sponsorship reasons) was the 104th water polo championship in Hungary.

First stage

#	Team	M	Gy	D	V	G+	G-	P
1.	ZF-Egri VK	20	17	1	2	221	141	52
2.	TEVA-Vasas SC-Plaket	20	16	1	3	273	126	49
3.	Szeged-Beton VE	20	14	3	3	204	139	45
4.	Ferencvárosi TC	20	13	1	6	182	155	40
5.	Domino-Bp. Honvéd	20	12	2	6	199	145	38
6.	Szolnoki Főiskola VSC-Közgép	20	9	4	7	179	161	31
7.	BVSC-Zugló	20	7	1	12	161	219	22
8.	Uniqa-Újpesti TE	20	5	1	14	131	202	16
9.	Pécsi Vízmű-Pécsi VSK	20	3	3	14	157	222	12
10.	OSC	20	3	2	15	147	233	11
11.	Szentesi VK	20	1	1	18	125	236	4

	Championship Playoff
	European competition Playoff
	Relegation Playoff

Pld - Played; W - Won; L - Lost; G+ - Points for; G- - Points against; Diff - Difference; P - Points.

Championship Playoff

Semifinals					Final

1	ZF-Eger	11	5	8
4	FTC-Fisher Klíma	6	7	5
					1	ZF-Eger	12 (p)	2	6	12	9

					2	TEVA-VasasPlaket	11	6	7	11	10
2	TEVA-VasasPlaket	7	10	15

3	Szeged Beton	5	3	13	Third place
					3	Szeged Beton	6	11	7
					4	FTC-Fisher Klíma	4	12	5

European competition Playoff

#	Team	M	W	D	L	G+	G-	P	BP
5.	Domino-Bp. Honvéd	6	6	0	0	68	37	30	18
6.	Szolnoki Főiskola VSC-Közgép	6	3	2	1	51	38	19	11
7.	BVSC-Zugló	6	1	1	4	47	62	10	4
8.	Uniqa-Újpesti TE	6	1	0	5	46	75	6	3

LEN Cup qualification

Pld - Played; W - Won; L - Lost; G+ - Points for; G- - Points against; Diff - Difference; P - Points; BP - Bonus Points.

Relegation Playoff

#	Team	M	W	D	L	G+	G-	P	BP
9.	Pécsi Vízmű-Pécsi VSK	4	2	1	1	43	37	19	7
10.	OSC	4	2	2	0	41	31	17	8
11.	Szentesi VK	4	0	1	3	31	47	7	1

Relegation

Pld - Played; W - Won; L - Lost; G+ - Points for; G- - Points against; Diff - Difference; P - Points; Bp - Bonus Points.

Final standing

	Qualified for the 2010–11 LEN Euroleague
	Qualified for the 2010–11 LEN Cup

Rank	Team
	20px TEVA-VasasPlaket
	20px ZF-Eger
	20px Szeged-Beton VE
4	20px Ferencvárosi TC
5	Domino-Honvéd
6	20px Szolnoki Főiskola VSC-Közgép
7	20px BVSC-Zugló
8	Uniqa-Újpesti TE
9	20px Pécsi Vízmű-Pécsi VSK
10	20px OSC-Opus Via
11	Szentesi VK