The Montreal Canadiens have the highest goal differential by a team in a season, with a differential of 216 goals in 1976-77.

largest goal differential in an nhl season

TEAM	DIFF	SEASON	GP	W	L	T	OTL	PTS	PTS%	G	GA	PP%	PK%	S/GP	SA/GP
Montreal Canadiens	216	1976-77	80	60	8	12		132	.825	387	171			35.19	25.63
Boston Bruins	192	1970-71	78	57	14	7		121	.776	399	207			40.59	31.26
Montreal Canadiens	176	1977-78	80	59	10	11		129	.806	359	183	31.9	81.0	32.76	25.94
Montreal Canadiens	163	1975-76	80	58	11	11		127	.794	337	174			34.16	27.38
Montreal Canadiens	149	1974-75	80	47	14	19		113	.706	374	225			31.91	28.44
Montreal Canadiens	145	1972-73	78	52	10	16		120	.769	329	184			32.01	29.92
Detroit Red Wings	144	1995-96	82	62	13	7		131	.799	325	181	21.3	88.3	32.29	24.17
New York Islanders	144	1978-79	80	51	15	14		116	.725	358	214	31.2	80.2	28.76	28.86
Philadelphia Flyers	139	1975-76	80	51	13	16		118	.738	348	209			37.46	27.78
Montreal Canadiens	137	1981-82	80	46	17	17		109	.681	360	223	24.2	80.1	33.78	27.48
New York Islanders	135	1981-82	80	54	16	10		118	.738	385	250	27.8	79.9	30.86	30.08
Montreal Canadiens	133	1978-79	80	52	17	11		115	.719	337	204	28.3	83.6	32.16	25.41
Edmonton Oilers	132	1983-84	80	57	18	5		119	.744	446	314	25.5	79.7	32.64	33.01
Calgary Flames	128	1988-89	80	54	17	9		117	.731	354	226	25.2	82.8	34.64	25.74
Boston Bruins	128	1973-74	78	52	17	9		113	.724	349	221			33.96	29.31
Boston Bruins	127	2022-23	82	65	12		5	135	.823	301	174	22.2	87.3	32.98	29.84
Boston Bruins	126	1971-72	78	54	13	11		119	.763	330	204			33.76	29.12
New York Rangers	125	1971-72	78	48	17	13		109	.699	317	192			36.04	25.86
Montreal Canadiens	125	1943-44	50	38	5	7		83	.830	234	109
New York Islanders	124	1977-78	80	48	17	15		111	.694	334	210	31.4	83.5	31.13	28.20
Edmonton Oilers	122	1981-82	80	48	17	15		111	.694	417	295	25.6	81.7	33.63	31.73
Buffalo Sabres	117	1979-80	80	47	17	16		110	.688	318	201	24.4	82.9	29.33	23.99
Edmonton Oilers	116	1985-86	80	56	17	7		119	.744	426	310	26.3	81.1	33.06	34.73
Boston Bruins	115	1977-78	80	51	18	11		113	.706	333	218	20.2	82.1	30.31	22.49
Buffalo Sabres	114	1974-75	80	49	16	15		113	.706	354	240			36.96	26.08