Oregon Partisan Registration Margin Change 1986-2010

The changes are in percentage terms.

Though the sense among many is that Oregon has shifted to the Democrats, there has been relatively little change during the past 24 years. In fact, as visible above, comparatively few counties have shifted toward the Democrats. The greatest shift towards Democrats has been in Multnomah County.

There has been a greater division statewide. Eastern and southern Oregon have become significantly more Republican.

This map is based on the 1986 registration figures http://lindholmcompanyblog.com/?p=5266 and the 2010 registration figures http://lindholmcompanyblog.com/?p=5269.

Source of data: Oregon Secretary of State

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