Terry Porter has the most assists for the Trail Blazers in a season, with 831 assists in 1987-88.

trail blazers player with most assists in a season

NAME	AST	SEASON	TM	GP	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	PTS	REB	STL	BLK	TOV	PF	+/-
Terry Porter	831	1987-88	POR	82	36.5	14.9	4.6	10.1	1.8	0.2	3.0	5.6	10.9	51.9	0.3	0.8	34.8	3.3	4.0	84.6	2,991	1,222	378	150	16	244	204
Terry Porter	770	1988-89	POR	81	38.3	17.7	4.5	9.5	1.8	0.1	3.1	6.7	14.1	47.1	1.0	2.7	36.1	3.4	4.0	84.0	3,102	1,431	367	146	8	248	187
Rod Strickland	740	1993-94	POR	82	35.2	17.2	4.5	9.0	1.8	0.3	3.1	6.4	13.3	48.3	0.0	0.1	20.0	4.3	5.7	74.9	2,889	1,411	370	147	24	257	171
Terry Porter	726	1989-90	POR	80	34.8	17.6	3.4	9.1	1.9	0.1	3.1	5.6	12.1	46.2	1.1	3.0	37.4	5.3	5.9	89.2	2,781	1,406	272	151	4	245	150
Terry Porter	715	1986-87	POR	80	33.9	13.1	4.2	8.9	2.0	0.1	3.2	4.7	9.6	48.8	0.2	0.8	21.7	3.5	4.2	83.8	2,714	1,045	337	159	9	255	192
Terry Porter	649	1990-91	POR	81	32.9	17.0	3.5	8.0	2.0	0.1	2.3	6.0	11.7	51.5	1.6	3.9	41.5	3.4	4.2	82.3	2,665	1,381	282	158	12	189	151
Rod Strickland	640	1995-96	POR	67	37.7	18.7	4.4	9.6	1.4	0.2	3.8	7.0	15.3	46.0	0.6	1.7	34.2	4.1	6.3	65.2	2,526	1,256	297	97	16	255	135
Clyde Drexler	600	1985-86	POR	75	34.3	18.5	5.6	8.0	2.6	0.6	3.8	7.2	15.2	47.5	0.2	0.8	20.0	3.9	5.1	76.9	2,576	1,389	421	197	46	282	270
Kenny Anderson	584	1996-97	POR	82	37.6	17.5	4.4	7.1	2.0	0.2	2.4	5.9	13.9	42.7	1.6	4.5	36.1	4.1	5.3	76.8	3,081	1,436	363	162	15	193	222	+342
Andre Miller	566	2010-11	POR	81	32.7	12.7	3.7	7.0	1.4	0.1	2.4	4.8	10.4	46.0	0.0	0.5	10.8	3.1	3.6	85.3	2,650	1,029	302	114	12	197	171	+254
Clyde Drexler	566	1986-87	POR	82	38.0	21.7	6.3	6.9	2.5	0.9	3.1	8.6	17.2	50.2	0.1	0.6	23.4	4.4	5.7	76.0	3,114	1,782	518	204	71	253	281
Rod Strickland	562	1994-95	POR	64	35.4	18.9	5.0	8.8	1.9	0.1	3.3	6.9	14.8	46.6	0.7	1.9	37.4	4.4	5.9	74.5	2,267	1,211	317	123	9	209	118
Rod Strickland	559	1992-93	POR	78	31.7	13.7	4.3	7.2	1.7	0.3	2.6	5.1	10.5	48.5	0.1	0.4	13.3	3.5	4.9	71.7	2,474	1,069	337	131	24	199	153
Kelvin Ransey	555	1981-82	POR	78	31.0	16.1	2.4	7.1	1.2	0.1	2.9	6.5	14.0	46.1	0.0	0.5	7.9	3.1	4.1	76.1	2,418	1,253	186	97	4	229	169
Kelvin Ransey	555	1980-81	POR	80	30.4	15.2	2.4	6.9	1.1	0.1	2.9	6.6	14.5	45.2	0.0	0.4	9.7	2.1	2.7	74.9	2,431	1,217	195	88	9	232	201
Damian Lillard	551	2018-19	POR	80	35.5	25.8	4.6	6.9	1.1	0.4	2.7	8.5	19.2	44.4	3.0	8.0	36.9	5.9	6.4	91.2	2,838	2,067	371	88	34	212	148	+495
Damian Lillard	531	2012-13	POR	82	38.6	19.0	3.1	6.5	0.9	0.2	3.0	6.7	15.7	42.9	2.3	6.1	36.8	3.3	3.9	84.4	3,167	1,562	257	74	19	243	172	-62
Damian Lillard	530	2019-20	POR	66	37.5	30.0	4.3	8.0	1.1	0.3	2.9	9.5	20.4	46.3	4.1	10.2	40.1	7.0	7.8	88.8	2,474	1,978	284	70	22	194	114	+84
Darnell Valentine	522	1984-85	POR	75	30.4	11.6	2.9	7.0	1.9	0.1	2.6	4.3	9.1	47.3	0.0	0.0	0.0	3.1	3.9	79.3	2,278	872	219	143	5	194	189
Damian Lillard	512	2015-16	POR	75	35.7	25.1	4.0	6.8	0.9	0.4	3.2	8.2	19.7	41.9	3.1	8.1	37.5	5.5	6.2	89.2	2,676	1,879	302	65	28	242	165	+94
Clyde Drexler	512	1991-92	POR	76	36.2	25.0	6.6	6.7	1.8	0.9	3.2	9.1	19.4	47.0	1.5	4.4	33.7	5.3	6.6	79.4	2,751	1,903	500	138	70	240	229
Damian Lillard	507	2014-15	POR	82	35.7	21.0	4.6	6.2	1.2	0.3	2.7	7.2	16.6	43.4	2.4	7.0	34.3	4.2	4.9	86.4	2,925	1,720	378	97	21	222	164	+302
Damian Lillard	505	2020-21	POR	67	35.8	28.8	4.2	7.5	0.9	0.3	3.0	9.0	19.9	45.1	4.1	10.5	39.1	6.7	7.2	92.8	2,398	1,928	283	62	17	203	102	+198
Damon Stoudamire	500	2003-04	POR	82	38.0	13.4	3.8	6.1	1.2	0.1	2.2	5.0	12.4	40.1	1.9	5.2	36.5	1.5	1.8	87.6	3,118	1,099	308	99	9	180	173	-120
Clyde Drexler	493	1990-91	POR	82	34.8	21.5	6.7	6.0	1.8	0.7	2.8	7.9	16.3	48.2	0.7	2.3	31.9	5.1	6.4	79.4	2,852	1,767	546	144	60	232	226