1965–66 Suomi-sarja season

The 1965-66 Suomi-sarja season was the sixth season of the league as the second tier of Finnish hockey. It was divided into three groups (North, West, and East), with the top team in each group earning promotion to the SM-sarja.

Regular season

Northern Group

	Club	GP	W	T	L	GF	GA	Pts
1.	Hermes Kokkola	12	10	1	1	78	33	21
2.	JyP Jyväskylä	12	6	3	3	50	39	15
3.	KaPa Kajaani	12	7	1	4	54	51	15
4.	Valo Mänttä	12	6	1	5	41	46	13
5.	OPS Oulu	12	4	2	6	35	51	10
6.	MU Mänttä	12	3	0	9	41	65	6
7.	Vesa Raahe	12	2	0	10	33	47	4

Western Group

	Club	GP	W	T	L	GF	GA	Pts
1.	Tappara Tampere	14	12	2	0	129	18	26
2.	TP-V Tampere	14	11	1	2	84	37	23
3.	Hokki Rauma	14	9	0	5	69	60	18
4.	HPL Hämeenlinna	14	7	0	7	68	85	14
5.	VehU Vehmainen	14	6	0	8	54	81	12
6.	Tarmo Hämeenlinna	14	5	1	8	57	46	11
7.	PiTa Helsinki	14	4	0	10	57	99	8
8.	TuKV Turku	14	0	0	14	31	121	0

Eastern Group

	Club	GP	W	T	L	GF	GA	Pts
1.	SaPKo Savonlinna	14	10	1	3	70	35	21
2.	LaPa Lahti	14	9	1	4	75	51	19
3.	Töölön Vesa	14	8	0	6	69	55	16
4.	KalPa Kuopio	14	7	2	5	61	70	16
5.	JoKP Joensuu	14	4	3	7	55	52	11
6.	MP Mikkeli	14	5	1	8	48	69	11
7.	WU Warkaus	14	4	2	8	45	71	10
8.	PiPS Pieksämaki	14	3	2	9	41	61	8