Justin Williams had 41 goals, 61 assists and a plus-minus of +30 in 162 games in the playoffs in his career.

	NAME	SEASON	TM	GP	G	A	P	+/-	PIM	PPG	PPA	SHG	SHA	GWG	OTG	S	S%	FOW	FO	FOW%	HIT	BKS	TKA	GVA	TOI/GP
1	Justin Williams J. Williams	2001-02	PHI	5	0	0	0	-3	4	0	0	0	0	0	0	15	0.0	1	1	100.0	7	4	4	7	16:42
2	Justin Williams J. Williams	2002-03	PHI	12	1	5	6	+2	8	0	0	0	0	1	0	21	4.8	0	2	0.0	9	5	2	9	14:11
3	Justin Williams J. Williams	2005-06	CAR	25	7	11	18	+12	34	0	4	1	0	1	0	71	9.9	0	2	0.0	23	20	25	22	21:36
4	Justin Williams J. Williams	2009-10	LAK	3	0	1	1	0	2	0	0	0	0	0	0	4	0.0	0	1	0.0	6	2	1	1	11:24
5	Justin Williams J. Williams	2010-11	LAK	6	3	1	4	0	2	1	1	0	0	0	0	16	18.8	0	0		1	1	4	6	16:45
6	Justin Williams J. Williams	2011-12	LAK	20	4	11	15	+8	12	1	3	0	0	0	0	58	6.9	0	2	0.0	10	6	6	16	18:24
7	Justin Williams J. Williams	2012-13	LAK	18	6	3	9	0	8	1	0	0	1	2	0	57	10.5	1	2	50.0	21	5	11	9	18:36
8	Justin Williams J. Williams	2013-14	LAK	26	9	16	25	+13	35	2	2	0	0	2	1	67	13.4	3	5	60.0	31	11	11	28	16:49
9	Justin Williams J. Williams	2015-16	WSH	12	3	4	7	-3	14	0	3	0	0	0	0	30	10.0	6	11	54.5	12	8	4	6	15:28
10	Justin Williams J. Williams	2016-17	WSH	13	3	6	9	0	6	1	2	0	0	1	1	29	10.3	6	9	66.7	14	10	6	9	18:38
11	Justin Williams J. Williams	2018-19	CAR	15	4	3	7	+1	18	0	0	0	0	1	0	43	9.3	17	45	37.8	17	4	9	10	18:08
12	Justin Williams J. Williams	2019-20	CAR	7	1	0	1	0	9	0	0	0	0	0	0	18	5.6	4	4	100.0	7	2	2	4	15:17
	Total			162	41	61	102	+30	152	6	15	1	1	8	2	429	9.6	38	84	45.2	158	78	85	127	17:45