| Election Name: | 2016 Oregon Democratic presidential primary |
| Country: | Oregon |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 2008 Oregon Democratic presidential primary |
| Previous Year: | 2008 |
| Next Election: | 2020 Oregon Democratic presidential primary |
| Next Year: | 2020 |
| Candidate1: | Bernie Sanders |
| Color1: | 228B22 |
| Home State1: | Vermont |
| Delegate Count1: | 36 |
| Popular Vote1: | 360,829[1] |
| Percentage1: | 56.24% |
| Candidate2: | Hillary Clinton |
| Color2: | d4aa00 |
| Home State2: | New York |
| Delegate Count2: | 25 |
| Popular Vote2: | 269,846 |
| Percentage2: | 42.06% |
| Map Size: | 300px |
The 2016 Oregon Democratic presidential primary was held on May 17 in the U.S. state of Oregon as one of the Democratic Party's primaries ahead of the 2016 presidential election.
On the same day, the Democratic Party held their Kentucky primary, while the Republican Party held their own Oregon primary on that day.
| Poll source | Date | 1st | 2nd | Other | |||
|---|---|---|---|---|---|---|---|
| Official Primary Results | May 17, 2016 | Bernie Sanders 56.2% | Hillary Clinton 42.1% | Misc. 1.7% | |||
| DHM Research[2] Margin of error: ± 5.6% Sample size: 901 | May 6–9, 2016 | Hillary Clinton 48% | Bernie Sanders 33% | Others / Undecided 19% | |||
| KATU-TV/SurveyUSA[3] Margin of error: ± 4.0% Sample size: 630 | March 28-April 1, 2016 | Hillary Clinton 37% | Bernie Sanders 36% | Others / Undecided 27% | |||
| DHM Research[4] Margin of error: ± 7% Sample size: 206 | July 22–27, 2015 | Hillary Clinton 44% | Bernie Sanders 39% | Others / Undecided 17% |
See also: Results of the 2016 Democratic Party presidential primaries.
As Barack Obama had done against Hillary Clinton in the state eight years earlier, Sanders won a convincing double-digit victory in Oregon, as he tried to breathe new life into his campaign. Massive grassroots support across the state helped the progressive and populist candidate achieve a double-digit win in a state with a closed primary. Sanders swept all counties in the state but one. He won a large victory in populous Portland in Multnomah County, where the bulk of the vote came from. He also was buoyed by support from the capital city of Salem in Marion County. Sanders swept all of the other major cities as well, including Eugene, Bend, and Medford, and likewise performed strongly in most of the rural and remote counties of the state, including those of Central Oregon and in the Oregon high desert bordering Idaho from the west. Sanders performed well in areas that were diverse in ethnicity as well as those which were less diverse. In fact, some of his largest margins of victory came from areas with a greater ethnic diversity in the state, such as Portland or Hillsboro, Oregon.
Clinton only won one county, Gilliam County, by one vote.