Magic Johnson has the most assists per game in an NBA Finals, with 14.0 per game.

most assists per game by a player in a finals series

NAME	APG	SEASON	SERIES	TM	GP	MPG	PPG	RPG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
Magic Johnson	14.0	1984-85	NBA Finals	LAL	6	39.2	18.3	6.8	2.2	0.0	3.3	6.8	13.8	49.4	0.2	0.3	50.0	4.5	5.2	87.1	235	110	41	84	13	0	20	16
Magic Johnson	13.6	1983-84	NBA Finals	LAL	7	42.1	18.0	7.7	2.0	0.9	4.4	6.7	12.0	56.0	0.0	0.1	0.0	4.6	6.1	74.4	295	126	54	95	14	6	31	28
Magic Johnson	13.0	1987-88	NBA Finals	LAL	7	41.4	21.1	5.7	2.0	0.1	2.7	6.3	11.4	55.0	0.3	0.9	33.3	8.3	9.6	86.6	290	148	40	91	14	1	19	23
Magic Johnson	13.0	1986-87	NBA Finals	LAL	6	39.3	26.2	8.0	2.3	0.3	2.2	11.0	20.3	54.1	0.2	0.3	50.0	4.0	4.2	96.0	236	157	48	78	14	2	13	10
Magic Johnson	12.5	1982-83	NBA Finals	LAL	4	44.8	19.0	7.8	1.8	0.8	6.0	6.3	15.5	40.3	0.0	0.8	0.0	6.5	7.0	92.9	179	76	31	50	7	3	24	16
Magic Johnson	12.4	1990-91	NBA Finals	LAL	5	45.6	18.6	8.0	1.2	0.0	4.4	5.0	11.6	43.1	0.8	2.8	28.6	7.8	8.2	95.1	228	93	40	62	6	0	22	10
Michael Jordan	11.4	1990-91	NBA Finals	CHI	5	44.0	31.2	6.6	2.8	1.4	3.6	12.6	22.6	55.8	0.4	0.8	50.0	5.6	6.6	84.8	220	156	33	57	14	7	18	18
Bob Cousy	10.6	1960-61	NBA Finals	BOS	5	37.2	19.8	5.0				6.4	17.8	36.0				7.0	8.6	81.4	186	99	25	53				12
Walt Frazier	10.4	1969-70	NBA Finals	NYK	7	43.1	17.6	7.7				6.6	12.1	54.1				4.4	5.7	77.5	302	123	54	73				21
Jamal Murray	10.0	2022-23	NBA Finals	DEN	5	42.3	21.4	6.2	1.0	0.0	3.4	8.2	18.2	45.1	2.4	6.2	38.7	2.6	2.8	92.9	211	107	31	50	5	0	17	9	+55
LeBron James	10.0	2017-18	NBA Finals	CLE	4	44.7	34.0	8.5	1.3	1.0	5.0	12.3	23.3	52.7	1.5	4.5	33.3	8.0	9.5	84.2	179	136	34	40	5	4	20	11	-60
LeBron James	10.0	2016-17	NBA Finals	CLE	5	42.4	33.6	12.0	1.4	1.0	4.2	13.2	23.4	56.4	2.4	6.2	38.7	4.8	7.4	64.9	212	168	60	50	7	5	21	13	-7
Norm Nixon	10.0	1981-82	NBA Finals	LAL	6	39.3	17.7	3.7	1.7	0.2	2.5	7.5	17.0	44.1	0.0	0.2	0.0	2.7	3.7	72.7	236	106	22	60	10	1	15	20
Bob Cousy	10.0	1959-60	NBA Finals	BOS	7	35.4	14.4	3.7				5.9	18.9	31.1				2.7	3.3	82.6	248	101	26	70				12
Jimmy Butler	9.8	2019-20	NBA Finals	MIA	6	43.0	26.2	8.3	2.2	0.8	3.0	8.8	16.0	55.2	0.7	2.2	30.8	7.8	8.8	88.7	258	157	50	59	13	5	18	8	-21
Jason Kidd	9.8	2001-02	NBA Finals	NJN	4	42.0	20.8	7.3	2.3	0.8	3.0	8.8	20.0	43.8	1.5	5.0	30.0	1.8	2.8	63.6	168	83	29	39	9	3	12	8	-12
Larry Bird	9.5	1985-86	NBA Finals	BOS	6	44.8	24.0	9.7	2.7	0.3	2.7	8.8	18.3	48.2	1.2	3.2	36.8	5.2	5.5	93.9	269	144	58	57	16	2	16	17
Dennis Johnson	9.5	1984-85	NBA Finals	BOS	6	41.2	16.0	4.3	1.7	0.7	3.3	6.5	17.0	38.2	0.0	1.3	0.0	3.0	3.5	85.7	247	96	26	57	10	4	20	13
Oscar Robertson	9.5	1970-71	NBA Finals	MIL	4	41.0	23.5	5.0				8.5	16.3	52.3				6.5	8.0	81.3	164	94	20	38				15
Stephen Curry	9.4	2016-17	NBA Finals	GSW	5	37.7	26.8	8.0	2.2	0.0	3.8	8.0	18.2	44.0	3.8	9.8	38.8	7.0	7.8	89.7	189	134	40	47	11	0	19	14	+30
Jrue Holiday	9.3	2020-21	NBA Finals	MIL	6	41.7	16.7	6.2	2.2	0.7	2.2	6.5	18.0	36.1	1.8	5.8	31.4	1.8	2.0	91.7	250	100	37	56	13	4	13	11	+37
Draymond Green	9.3	2018-19	NBA Finals	GSW	6	41.3	12.5	10.8	1.7	1.0	5.0	4.3	10.0	43.3	0.8	3.2	26.3	3.0	3.5	85.7	248	75	65	56	10	6	30	26	-21
Dennis Johnson	9.3	1986-87	NBA Finals	BOS	6	40.7	21.0	4.3	0.5	0.5	1.3	8.5	17.7	48.1	0.2	1.3	12.5	3.8	4.3	88.5	244	126	26	56	3	3	8	15
Isiah Thomas	9.0	1987-88	NBA Finals	DET	7	37.4	19.7	4.4	2.9	0.3	3.7	7.0	16.4	42.6	0.7	2.4	29.4	5.0	6.0	83.3	262	138	31	63	20	2	26	23
LeBron James	8.9	2015-16	NBA Finals	CLE	7	41.7	29.7	11.3	2.6	2.3	4.4	11.7	23.7	49.4	1.9	5.0	37.1	4.4	6.1	72.1	292	208	79	62	18	16	31	16	+26