Poll Chart
2016 Iowa Democratic Presidential Caucus
This chart combines the latest opinion polls into trendlines and is updated whenever a new poll is released.
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Our averages don't add up to 100% because we calculate each trendline separately.
Latest Polls
Poll | Sanders |
Biden |
Clinton |
O'Malley |
Webb |
Chafee |
Lessig |
Undecided |
Other |
---|---|---|---|---|---|---|---|---|---|
Jan 29 – Jan 31, 2016
300 Likely Voters - Democrat
|
43 | 51 | 4 | 3 | |||||
Jan 25 – Jan 31, 2016
919 Likely Voters - Democrat
|
49 | 46 | 3 | 2 | |||||
Jan 26 – Jan 29, 2016
602 Likely Voters - Democrat
|
42 | 45 | 3 | 9 | |||||
Jan 26 – Jan 27, 2016
810 Likely Voters - Democrat
|
42 | 53 | 5 | ||||||
Jan 26 – Jan 27, 2016
851 Likely Voters - Democrat
|
40 | 48 | 7 | 5 | |||||
Jan 24 – Jan 26, 2016
426 Likely Voters - Democrat
|
45 | 48 | 3 | 4 | 0 | ||||
Jan 23 – Jan 26, 2016
504 Likely Voters - Democrat
|
42 | 47 | 6 | 6 | |||||
Jan 21 – Jan 24, 2016
400 Likely Voters - Democrat
|
48 | 45 | 3 | 4 | |||||
Jan 18 – Jan 24, 2016
606 Likely Voters - Democrat
|
49 | 45 | 4 | 2 | |||||
Jan 5 – Jan 22, 2016
226 Likely Voters - Democrat
|
45 | 47 | 1 | 4 | 3 | ||||
Jan 18 – Jan 21, 2016
423 Likely Voters - Democrat
|
42 | 48 | 3 | 5 | 2 | ||||
Jan 18 – Jan 21, 2016
490 Likely Voters - Democrat
|
47 | 46 | 5 | 1 | |||||
Jan 18 – Jan 20, 2016
258 Likely Voters - Democrat
|
43 | 52 | 3 | 2 | |||||
Jan 15 – Jan 20, 2016
280 Likely Voters - Democrat
|
51 | 43 | 4 | 1 | 1 | ||||
Jan 18 – Jan 19, 2016
570 Likely Voters - Democrat
|
39 | 48 | 7 | 6 | |||||
Jan 13 – Jan 18, 2016
500 Likely Voters - Democrat
|
30 | 59 | 7 | 5 | |||||
Jan 11 – Jan 12, 2016
461 Likely Voters - Democrat
|
36 | 57 | 7 | ||||||
Jan 8 – Jan 10, 2016
580 Likely Voters - Democrat
|
40 | 46 | 8 | 5 | |||||
Jan 7 – Jan 10, 2016
504 Likely Voters - Democrat
|
40 | 42 | 4 | 14 | |||||
Jan 6 – Jan 10, 2016
600 Likely Voters - Democrat
|
47 | 44 | 3 | 5 | 0 | ||||
Jan 5 – Jan 10, 2016
492 Likely Voters - Democrat
|
49 | 44 | 4 | 3 | |||||
Jan 4 – Jan 8, 2016
503 Likely Voters - Democrat
|
42 | 49 | 5 | 5 | |||||
Jan 2 – Jan 7, 2016
422 Likely Voters - Democrat
|
45 | 48 | 5 | 3 | 0 | ||||
Dec 18 – Dec 21, 2015
418 Likely Voters - Democrat
|
31 | 49 | 10 | 10 | |||||
Dec 14 – Dec 17, 2015
602 Likely Voters - Democrat
|
45 | 50 | 4 | 1 | |||||
Dec 10 – Dec 13, 2015
526 Likely Voters - Democrat
|
34 | 52 | 7 | 6 | |||||
Dec 4 – Dec 13, 2015
727 Likely Voters - Democrat
|
40 | 51 | 6 | 3 | |||||
Dec 7 – Dec 10, 2015
501 Likely Voters - Democrat
|
27 | 59 | 4 | 10 | |||||
Dec 7 – Dec 10, 2015
400 Likely Voters - Democrat
|
39 | 48 | 4 | 8 | |||||
Dec 7 – Dec 10, 2015
357 Likely Voters - Democrat
|
36 | 50 | 5 | 6 | 4 | ||||
Dec 3 – Dec 6, 2015
405 Likely Voters - Democrat
|
33 | 55 | 6 | 3 | |||||
Nov 28 – Dec 6, 2015
442 Likely Voters - Democrat
|
36 | 54 | 4 | 3 | 2 | ||||
Nov 16 – Nov 22, 2015
543 Likely Voters - Democrat
|
42 | 51 | 4 | 3 | |||||
Nov 15 – Nov 19, 2015
602 Likely Voters - Democrat
|
44 | 50 | 5 | 1 | |||||
Nov 10 – Nov 16, 2015
211 Registered Voters - Democrat
|
37 | 55 | 2 | 6 | 0 | ||||
Nov 2 – Nov 15, 2015
496 Likely Voters - Democrat
|
28 | 50 | 3 | ||||||
Oct 29 – Nov 4, 2015
498 Likely Voters - Democrat
|
37 | 55 | 3 | 4 | 1 | ||||
Oct 30 – Nov 1, 2015
615 Likely Voters - Democrat
|
25 | 57 | 7 | 1 | 9 | ||||
Oct 31 – Oct 31, 2015
273 Likely Voters - Democrat
|
25 | 57 | 3 | 15 | |||||
Oct 29 – Oct 31, 2015
681 Likely Voters - Democrat
|
32 | 46 | 5 | 17 | |||||
Oct 22 – Oct 25, 2015
400 Likely Voters - Democrat
|
24 | 65 | 5 | 1 | 4 | ||||
Oct 19 – Oct 22, 2015
500 Likely Voters - Democrat
|
24 | 62 | 3 | 1 | 0 | 10 | |||
Oct 15 – Oct 22, 2015
555 Likely Voters - Democrat
|
43 | 46 | 3 | 0 | 1 | 0 | 7 | ||
Oct 14 – Oct 20, 2015
592 Likely Voters - Democrat
|
40 | 51 | 4 | 0 | 0 | 4 | |||
Oct 16 – Oct 19, 2015
402 Likely Voters - Democrat
|
41 | 48 | 2 | 1 | 1 | 0 | 3 | ||
Sep 23 – Sep 30, 2015
348 Registered Voters - Democrat
|
36 | 47 | 4 | 1 | 0 | 13 | |||
Sep 25 – Sep 27, 2015
328 Likely Voters - Democrat
|
31 | 12 | 40 | 2 | 1 | 16 | |||
Sep 18 – Sep 20, 2015
494 Likely Voters - Democrat
|
22 | 17 | 43 | 3 | 3 | 2 | 0 | 9 | |
Sep 3 – Sep 10, 2015
646 Likely Voters - Democrat
|
43 | 10 | 33 | 5 | 1 | 1 | 7 | ||
Aug 27 – Sep 8, 2015
832 Likely Voters - Democrat
|
41 | 12 | 40 | 3 | 1 | 0 | 3 | ||
Aug 26 – Sep 2, 2015
345 Registered Voters - Democrat
|
37 | 48 | 4 | 2 | 1 | 8 | |||
Aug 29 – Aug 31, 2015
421 Likely Voters - Democrat
|
17 | 5 | 45 | 5 | 1 | 1 | 14 | ||
Aug 24 – Aug 27, 2015
502 Likely Voters - Democrat
|
23 | 16 | 48 | 4 | 0 | 1 | 6 | ||
Aug 23 – Aug 26, 2015
400 Likely Voters - Democrat
|
30 | 14 | 37 | 3 | 2 | 1 | 14 | ||
Aug 20 – Aug 24, 2015
500 Likely Voters - Democrat
|
20 | 11 | 54 | 4 | 1 | 0 | 10 | 0 | |
Aug 7 – Aug 11, 2015
429 Likely Voters - Democrat
|
31 | 12 | 50 | 1 | 1 | 0 | 4 | 1 | |
Aug 7 – Aug 9, 2015
567 Likely Voters - Democrat
|
25 | 52 | 7 | 3 | 1 | 11 | |||
Jul 29 – Jul 29, 2015
236 Likely Voters - Democrat
|
24 | 6 | 51 | 5 | 1 | 2 | |||
Jul 14 – Jul 21, 2015
320 Likely Voters - Democrat
|
26 | 55 | 4 | 2 | 1 | 13 | |||
Jun 27 – Jun 29, 2015
1,022 Likely Voters - Democrat
|
20 | 63 | 5 | 3 | 1 | 8 | |||
Jun 20 – Jun 29, 2015
761 Likely Voters - Democrat
|
33 | 7 | 52 | 3 | 1 | 0 | 5 | ||
Jun 19 – Jun 22, 2015
401 Likely Voters - Democrat
|
24 | 50 | 2 | 0 | 23 | ||||
May 31 – Jun 8, 2015
322 Registered Voters - Democrat
|
12 | 9 | 54 | 1 | 1 | 0 | 20 | 3 | |
May 25 – May 29, 2015
437 Likely Voters - Democrat
|
16 | 8 | 57 | 2 | 2 | 14 | |||
Apr 25 – May 4, 2015
692 Likely Voters - Democrat
|
15 | 11 | 60 | 3 | 3 | 0 | 7 | ||
Apr 23 – Apr 26, 2015
466 Likely Voters - Democrat
|
14 | 62 | 6 | 3 | 2 | 13 | |||
Apr 21 – Apr 23, 2015
491 Likely Voters - Democrat
|
2 | 6 | 57 | 2 | 1 | 0 | 17 | ||
Feb 16 – Feb 23, 2015
619 Likely Voters - Democrat
|
5 | 7 | 61 | 0 | 2 | 6 | |||
Feb 3 – Feb 10, 2015
320 Likely Voters - Democrat
|
7 | 12 | 68 | 1 | 1 | 12 | |||
Jan 26 – Jan 29, 2015
401 Likely Voters - Democrat
|
5 | 9 | 56 | 1 | 3 | 10 |