John Stockton has the most games with 20+ assists in a season, with 10 games in 1989-90.

Interpreted as:

NBA most 20+ assist games by a player in a season

	NAME	GP	AST	SEASON	TM	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	STL	BLK	TOV	PF	+/-
1	John Stockton J. Stockton	10	214	1989-90	UTA	39.8	17.1	2.9	21.4	2.6	0.4	6.7	11.2	59.8	0.5	0.9	55.6	3.2	4.7	68.1	64.4	0.8	2.1	3.0	398	171	29	26	4	30	33
2	Isiah Thomas I. Thomas	8	171	1984-85	DET	38.9	21.0	5.3	21.4	1.9	0.3	8.8	17.3	50.7	0.3	1.6	15.4	3.3	4.4	74.3	54.8	1.5	3.8	3.5	311	168	42	15	2	28	22
3	John Stockton J. Stockton	7	150	1987-88	UTA	41.3	17.3	3.0	21.4	4.3	0.3	6.6	10.0	65.7	0.3	0.6	50.0	3.9	4.7	81.8	71.6	0.6	2.4	3.3	289	121	21	30	2	23	15
4	John Stockton J. Stockton	5	106	1988-89	UTA	40.6	20.8	1.6	21.2	5.8	0.2	7.2	12.2	59.0	0.2	1.0	20.0	6.2	7.2	86.1	67.7	0.4	1.2	3.0	203	104	8	29	1	15	18
5	John Stockton J. Stockton	4	92	1990-91	UTA	39.3	18.5	2.8	23.0	4.8	0.0	6.8	14.0	48.2	1.0	3.0	33.3	4.0	5.3	76.2	56.7	0.8	2.0	4.3	157	74	11	19	0	17	15
6	Magic Johnson M. Johnson	4	81	1982-83	LAL	42.8	13.0	11.5	20.3			5.8	10.5	54.8	0.0	0.0		1.5	2.5	60.0	56.0				171	52	46				11
7	Trae Young T. Young	3	62	2024-25	ATL	38.5	25.0	3.3	20.7	0.7	0.3	7.0	19.7	35.6	3.7	12.0	30.6	7.3	7.7	95.7	54.3	0.0	3.3	3.3	116	75	10	2	1	10	5	+3
8	Russell Westbrook R. Westbrook	3	66	2020-21	WAS	39.4	25.7	16.0	22.0	1.0	0.7	9.7	18.7	51.8	2.3	4.3	53.8	4.0	4.7	85.7	61.9	1.7	14.3	4.3	118	77	48	3	2	13	10	+27
9	John Stockton J. Stockton	3	67	1991-92	UTA	38.7	15.7	4.0	22.3	3.7	0.3	5.3	11.7	45.7	0.7	2.0	33.3	4.3	4.7	92.9	57.1	1.3	2.7	4.0	116	47	12	11	1	12	7
10	Gary Grant G. Grant	3	62	1989-90	LAC	38.7	11.7	3.0	20.7	2.7	0.0	4.3	8.0	54.2	0.0	0.3	0.0	3.0	3.7	81.8	60.7	0.7	2.3	6.0	116	35	9	8	0	18	7
11	Magic Johnson M. Johnson	3	69	1989-90	LAL	42.7	21.3	6.7	23.0	4.7	1.0	5.3	12.0	44.4	1.3	3.0	44.4	9.3	10.0	93.3	65.0	1.3	5.3	3.3	128	64	20	14	3	10	2
12	Magic Johnson M. Johnson	3	62	1988-89	LAL	41.0	28.7	9.3	20.7	1.7	0.0	9.0	17.7	50.9	1.7	2.7	62.5	9.0	10.0	90.0	65.0	1.7	7.7	4.3	123	86	28	5	0	13	5
13	Magic Johnson M. Johnson	3	60	1985-86	LAL	36.0	18.3	6.0	20.0	1.3	0.0	7.0	12.0	58.3	0.0	0.7	0.0	4.3	4.7	92.9	65.2	1.7	4.3	3.7	108	55	18	4	0	11	5
14	Magic Johnson M. Johnson	3	65	1983-84	LAL	36.7	17.0	7.0	21.7	2.0	0.7	5.0	10.0	50.0	0.0	1.0	0.0	7.0	9.0	77.8	60.9	0.7	6.3	2.7	110	51	21	6	2	8	5
15	Tyrese Haliburton T. Haliburton	2	43	2023-24	IND	36.5	21.5	4.0	21.5	2.0	1.0	7.5	17.0	44.1	4.0	11.5	34.8	2.5	3.0	83.3	58.7	0.5	3.5	1.0	73	43	8	4	2	2	2	+51
16	James Harden J. Harden	2	41	2022-23	PHI	40.3	17.0	10.0	20.5	0.5	0.0	4.5	14.0	32.1	2.0	6.0	33.3	6.0	7.5	80.0	49.1	0.5	9.5	2.0	81	34	20	1	0	4	2	+24
17	Russell Westbrook R. Westbrook	2	45	2018-19	OKC	43.2	22.0	16.5	22.5	2.5	0.0	9.5	22.5	42.2	1.0	6.5	15.4	2.0	4.0	50.0	45.3	3.5	13.0	2.5	86	44	33	5	0	5	6	+19
18	Russell Westbrook R. Westbrook	2	41	2017-18	OKC	36.9	21.5	9.0	20.5	2.0	0.5	8.0	17.5	45.7	1.5	3.0	50.0	4.0	4.5	88.9	55.2	1.0	8.0	4.0	74	43	18	4	1	8	6	+18
19	Rajon Rondo R. Rondo	2	40	2015-16	SAC	44.4	10.5	9.0	20.0	2.0	0.5	4.5	9.5	47.4	1.0	3.0	33.3	0.5	1.0	50.0	52.8	2.5	6.5	4.5	89	21	18	4	1	9	7	-12
20	Rajon Rondo R. Rondo	2	40	2012-13	BOS	37.0	10.0	2.0	20.0	1.5	0.0	4.5	10.5	42.9	0.0	1.0	0.0	1.0	2.0	50.0	43.9	0.5	1.5	4.5	74	20	4	3	0	9	3	+21
21	Rajon Rondo R. Rondo	2	40	2011-12	BOS	47.4	14.0	13.5	20.0	1.5	0.5	5.0	18.0	27.8	0.0	1.0	0.0	4.0	5.5	72.7	34.3	3.0	10.5	5.0	95	28	27	3	1	10	6	+11
22	Rajon Rondo R. Rondo	2	47	2010-11	BOS	44.4	11.0	10.0	23.5	3.5	0.5	5.0	11.0	45.5	0.0	0.5	0.0	1.0	3.0	33.3	44.6	3.0	7.0	6.0	89	22	20	7	1	12	4	+18
23	Steve Nash S. Nash	2	40	2009-10	PHX	36.8	19.5	4.0	20.0	0.0	1.0	6.5	13.0	50.0	2.0	4.5	44.4	4.5	4.5	100.0	65.1	0.5	3.5	5.0	74	39	8	0	2	10	0	+40
24	Baron Davis B. Davis	2	40	2008-09	LAC	41.6	12.0	7.0	20.0	0.5	1.0	4.5	13.5	33.3	2.0	6.0	33.3	1.0	2.0	50.0	41.7	1.5	5.5	4.0	83	24	14	1	2	8	7	+30
25	Deron Williams D. Williams	2	40	2007-08	UTA	42.1	16.0	3.0	20.0	0.0	2.0	7.0	15.0	46.7	1.0	3.5	28.6	1.0	1.0	100.0	51.8	0.0	3.0	4.0	84	32	6	0	4	8	6	+13