Bobby Orr has the highest plus/minus in a season, at +124 in 1970-71.

Interpreted as:

best NHL plus minus by a player in a single season

	NAME	+/-	SEASON	TM	GP	G	A	P	PIM	PPG	PPA	SHG	SHA	GWG	OTG	S	S%
1	Bobby Orr B. Orr	+124	1970-71	BOS	78	37	102	139	91	5	44	3	10	5		392	9.4
2	Larry Robinson L. Robinson	+120	1976-77	MTL	77	19	66	85	45	3	15	0	0	3		196	9.7
3	Wayne Gretzky W. Gretzky	+100	1984-85	EDM	80	73	135	208	52	8	36	11	7	7	0	354	20.6
4	Dallas Smith D. Smith	+98	1970-71	BOS	73	7	38	45	68	0	1	2	4	1		159	4.4
5	Guy Lafleur G. Lafleur	+89	1976-77	MTL	80	56	80	136	20	14	18	0	0	8		290	19.3
6	Steve Shutt S. Shutt	+89	1976-77	MTL	80	60	45	105	28	8	10	0	0	9		293	20.5
7	Mark Howe M. Howe	+87	1985-86	PHI	77	24	58	82	36	4	19	7	3	3	0	193	12.4
8	Brad McCrimmon B. McCrimmon	+86	1985-86	PHI	80	13	43	56	85	2	13	0	3	2	0	167	7.8
9	Bobby Orr B. Orr	+84	1973-74	BOS	74	32	90	122	82	11	24	0	4	4		384	8.3
10	Bobby Clarke B. Clarke	+83	1975-76	PHI	76	30	89	119	136	10	28	4	2	2		194	15.5
11	Bobby Orr B. Orr	+83	1971-72	BOS	76	37	80	117	106	11	24	4	5	4		353	10.5
12	Wayne Gretzky W. Gretzky	+80	1981-82	EDM	80	92	120	212	26	18	39	6	2	12		370	24.9
13	Bobby Orr B. Orr	+80	1974-75	BOS	80	46	89	135	101	16	36	2	2	4		384	12.0
14	Serge Savard S. Savard	+79	1976-77	MTL	78	9	33	42	35	0	5	0	0	1		118	7.6
15	Bobby Clarke B. Clarke	+79	1974-75	PHI	80	27	89	116	125	10	24	3	2	4		195	13.8
16	Jari Kurri J. Kurri	+78	1984-85	EDM	73	71	64	135	30	14	14	3	3	13	0	267	26.6
17	Wayne Gretzky W. Gretzky	+78	1983-84	EDM	74	87	118	205	39	20	27	12	11	11	0	326	26.7
18	Brian Engblom B. Engblom	+78	1981-82	MTL	76	4	29	33	76	1	7	0	2	0		109	3.7
19	Jacques Laperriere J. Laperriere	+77	1972-73	MTL	58	7	16	23	34	2	1	0	1	0		89	7.9
20	Bryan Trottier B. Trottier	+76	1978-79	NYI	76	47	87	134	50	15	29	0	0	8		187	25.1
21	Bill Barber B. Barber	+74	1975-76	PHI	80	50	62	112	104	15	23	4	3	10		380	13.2
22	Guy Lafleur G. Lafleur	+73	1977-78	MTL	78	60	72	132	26	15	21	0	0	12		305	19.7
23	Steve Shutt S. Shutt	+73	1975-76	MTL	80	45	34	79	47	7	5	0	0	7		223	20.2
24	Reggie Leach R. Leach	+72	1975-76	PHI	80	61	30	91	41	10	13	0	0	11		335	18.2
25	Peter Mahovlich P. Mahovlich	+72	1975-76	MTL	80	34	71	105	76	8	18	1	0	7		200	17.0