In the August primary, 35% of all King County voters cast a ballot, but some neighborhoods turned out to vote in much higher — or lower — numbers.

Broken down by precinct, the highest rates within King County were 70%. The lowest were around 6%.

The neighborhoods with the highest turnout in August tended to have high median incomes (a list of the neighborhoods is below). For example: $85,000 a year in Magnolia; $123,000 in Redmond Ridge. That's according to King County Elections results and 2017 U.S. Census Bureau statistics. One caveat: while we have precinct level turnout, we only have income by zip code, which is broader geographically than precinct.

In neighborhoods where turnout was lowest — parts of Auburn, the Muckleshoot reservation, and the UW area — median incomes are $51,000-$65,000 a year.

The King County Elections office notices the trend regarding high income neighborhoods most elections. Their theory is that in high income areas residents have time to vote, own homes and have lived there longer, and know about neighborhood issues.