The Boston Bruins have the highest winning percentage by a team in a season, winning 87.5 percent of the time in 1929-30.

	TEAM	W%	SEASON	GP	W	L	T	OTL	PTS	PTS%	SOW	SOL	G	GA	DIFF	PP%	PK%	S/GP	S%	SA/GP	SV%
1	Bruins	.875	1929-30	44	38	5	1		77	.875			179	98	81
2	Canadiens	.830	1943-44	50	38	5	7		83	.830			234	109	125
3	Canadiens	.825	1976-77	80	60	8	12		132	.825			387	171	216			35.19	13.7	25.63	.917
4	Canadiens	.806	1977-78	80	59	10	11		129	.806			359	183	176	31.9	81.0	32.76	13.7	25.94	.912
5	Canadiens	.800	1944-45	50	38	8	4		80	.800			228	121	107
6	Red Wings	.799	1995-96	82	62	13	7		131	.799			325	181	144	21.3	88.3	32.29	12.3	24.17	.909
7	Canadiens	.794	1975-76	80	58	11	11		127	.794			337	174	163			34.16	12.3	27.38	.921
8	Bruins	.793	2022-23	82	65	12		5	135	.823	4	3	301	174	127	22.2	87.3	32.98	11.1	29.84	.929
9	Senators	.792	1919-20	24	19	5	0		38	.792			121	64	57
10	Bruins	.776	1970-71	78	57	14	7		121	.776			399	207	192			40.59	12.6	31.26	.915
11	Bruins	.771	1938-39	48	36	10	2		74	.771			156	76	80
12	Canadiens	.769	1972-73	78	52	10	16		120	.769			329	184	145			32.01	13.2	29.92	.921
13	Bruins	.763	1971-72	78	54	13	11		119	.763			330	204	126			33.76	12.5	29.12	.910
14	Lightning	.756	2018-19	82	62	16		4	128	.780	6	1	319	221	98	28.2	85.0	31.95	12.2	32.11	.916
15	Blackhawks	.750	2012-13	48	36	7		5	77	.802	6	5	149	97	52	16.7	87.2	31.13	10.0	26.21	.923
16	Penguins	.750	2012-13	48	36	12		0	72	.750	3	0	162	119	43	24.7	79.6	29.96	11.3	29.23	.915
17	Oilers	.744	1985-86	80	56	17	7		119	.744			426	310	116	26.3	81.1	33.06	16.1	34.73	.888
18	Oilers	.744	1983-84	80	57	18	5		119	.744			446	314	132	25.5	79.7	32.64	17.1	33.01	.881
19	Islanders	.738	1981-82	80	54	16	10		118	.738			385	250	135	27.8	79.9	30.86	15.6	30.08	.896
20	Flyers	.738	1975-76	80	51	13	16		118	.738			348	209	139			37.46	11.6	27.78	.906
21	Flames	.731	1988-89	80	54	17	9		117	.731			354	226	128	25.2	82.8	34.64	12.8	25.74	.890
22	Red Wings	.729	1994-95	48	33	11	4		70	.729			180	117	63	24.2	86.4	32.73	11.5	25.13	.903
23	Senators	.727	1926-27	44	30	10	4		64	.727			86	69	17
24	Flyers	.725	1979-80	80	48	12	20		116	.725			327	254	73	16.2	78.8	33.81	12.1	27.70	.885
25	Islanders	.725	1978-79	80	51	15	14		116	.725			358	214	144	31.2	80.2	28.76	15.6	28.86	.907