Iowa 2016 Presidential Election Polls

  Instantly compare a poll to prior one by same pollster

Clinton vs. Trump

Source Date Sample Clinton Trump Other
Poll Averages* 42.8% 45.2% 12.0%
11/05/2016 500 LV ±4.4% 44% 43% 13%
11/05/2016 800 LV ±3.5% 39% 46% 15%
11/04/2016 700 LV ±3.6% 41% 44% 15%
11/03/2016 1,076 LV ±3% 44% 46% 10%
10/27/2016 791 LV ±3.5% 46% 47% 7%
10/18/2016 1,135 LV 44% 49% 7%
10/08/2016 642 LV ±3.9% 39% 43% 18%
9/26/2016 491 LV ±4.4% 38% 38% 24%
9/22/2016 612 LV ±4% 44% 50% 6%
9/15/2016 404 LV ±4.9% 37% 45% 18%
9/12/2016 1,054 LV ±3% 40% 39% 21%
9/07/2016 827 LV 45% 43% 12%
9/06/2016 1,875 RV 42% 46% 12%
9/02/2016 600 LV ±3.9% 39% 44% 17%
8/21/2016 987 LV ±4% 40% 40% 20%
8/17/2016 846 LV ±3.4% 47% 44% 9%
8/11/2016 500 LV ±4.4% 40% 41% 19%
8/09/2016 899 RV ±3.3% 41% 37% 22%
7/17/2016 998 LV ±4.8% 39% 40% 21%
7/14/2016 1,318 RV ±2.7% 39% 37% 24%
7/13/2016 822 RV ±3.4% 42% 39% 19%
7/12/2016 401 LV ±4.9% 42% 44% 14%
6/30/2016 600 RV ±4% 48% 34% 18%
6/28/2016 897 RV ±3.3% 41% 39% 20%
6/16/2016 630 RV 44% 41% 15%
1/12/2016 1,901 RV ±2.3% 42% 42% 16%
1/10/2016 1,470 RV ±2.6% 48% 40% 12%
12/17/2015 1,426 RV ±2.6% 45% 43% 12%
11/04/2015 1,668 RV ±2.4% 44% 44% 12%
10/05/2015 1,061 RV ±3% 41% 48% 11%
9/06/2015 998 RV ±3.1% 43% 48% 9%
8/11/2015 1,500 RV ±2.5% 43% 40% 17%
Show: 10 All

Including Johnson and/or Stein

Source Date Sample Clinton Trump Johnson Stein Other
Poll Averages* 41.8% 44.2% 4.6% 2.2% 7.2%
11/05/2016 500 LV ±4.4% 44% 43% 3% 3% 7%
11/05/2016 800 LV ±3.5% 39% 46% 6% 1% 8%
11/04/2016 700 LV ±3.6% 41% 44% 5% 4% 6%
11/03/2016 1,076 LV ±3% 41% 44% 5% 2% 8%
10/27/2016 791 LV ±3.5% 44% 44% 4% 1% 7%
10/18/2016 1,135 LV 40% 45% 10% 2% 3%
10/08/2016 642 LV ±3.9% 39% 43% 6% 2% 10%
9/26/2016 491 LV ±4.4% 38% 38% 9% 1% 14%
9/22/2016 612 LV ±4% 37% 44% 10% 2% 7%
9/15/2016 404 LV ±4.9% 37% 45% 8% 2% 8%
9/12/2016 1,054 LV ±3% 40% 39% 10% 3% 8%
9/06/2016 1,875 RV 36% 40% 16% 3% 5%
9/02/2016 600 LV ±3.9% 39% 44% 8% 1% 8%
8/21/2016 987 LV ±4% 40% 40% 7% 2% 11%
8/17/2016 846 LV ±3.4% 41% 39% 12% 3% 5%
8/11/2016 500 LV ±4.4% 36% 37% 6% 3% 18%
8/09/2016 899 RV ±3.3% 35% 35% 12% 6% 12%
7/17/2016 998 LV ±4.8% 39% 40% 3% 2% 16%
7/14/2016 1,318 RV ±2.7% 42% 40% 8% 2% 8%
7/13/2016 822 RV ±3.4% 37% 37% 7% 4% 15%
7/12/2016 401 LV ±4.9% 42% 44% 6% 1% 7%
6/30/2016 600 RV ±4% 44% 31% 6% 2% 17%
Show: 10 All

* The average includes the most recent poll from each source released within the past ten days. If there are fewer than five qualifying polls, we look back, by date, until up to five^ qualifying polls are found. However, no polls older than 30 days are considered in the average.

^ All qualifying polls released on the same calendar date as the fifth poll will also be included in the average.

When Did It Last Happen?

Iowa Winner
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Election Winner
2016 2012 2000 1976

2016 Election Results


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