The 2011 Castleford Tigers season was the club's 14th year in the Super League. The club finished in 9th place, one position below the play-offs. Castleford also reached the semi-final of the Challenge Cup, but lost 8–10 against Leeds Rhinos in extra time.

Pos	Team v t e	Pld	W	D	L	PF	PA	PD	Pts	Qualification
1	Warrington Wolves (L)	27	22	0	5	1072	401	+671	44	Play-offs
2	Wigan Warriors	27	20	3	4	852	432	+420	43
3	St Helens	27	17	3	7	782	515	+267	37
4	Huddersfield Giants	27	16	0	11	707	524	+183	32
5	Leeds Rhinos (C)	27	15	1	11	757	603	+154	31
6	Catalans Dragons	27	15	1	11	689	626	+63	31
7	Hull Kingston Rovers	27	14	0	13	713	692	+21	28
8	Hull F.C.	27	13	1	13	718	569	+149	27
9	Castleford Tigers	27	12	2	13	664	808	−144	26
10	Bradford Bulls	27	9	2	16	570	826	−256	20
11	Salford City Reds	27	10	0	17	542	809	−267	20
12	Harlequins	27	6	1	20	524	951	−427	13
13	Wakefield Trinity Wildcats	27	7	0	20	453	957	−504	10[a]
14	Crusaders	27	6	0	21	527	857	−330	8[b]