COVID in King County, charts per city (7/15/2021)

Here are charts for King County cities. These charts rely on the King County outbreak summary dashboard together with population estimates from the JC_Rook’s daily spreadsheet report on King County.

I have produced charts of new cases of COVID-19 as

  • 7-day trailing averages
  • scaled to cases per 100k.

Google sheets link

All of my charts and tables are shared in a public Google sheets document:

King County

In April 2021, King County was above the state average. A steep decline followed in May and June. In July, there is an upward trend in cases in Washington overall. King County appears to match that rise in the first few days of the month.


Seattle continues to maintain a below-average trendline compared to the county average.

King County cities ranked as of 7/15/2021

  • Only cities with population > 5k
  • All of USA, WA and King County are included as reference points.

Charts for top 5 cities



Federal Way

Lakeland South



I chose these the average and 100k transformations to help readers identify how COVID-19 is trending in each chart and to allow readers to make fairly direct comparisons city-to-city.

These charts compare each city against the entire county. This allows us to say whether or not a city has generally been doing better or worse than the rest of the county. I am using the trailing averages and trend line comparison to mitigate the way that testing patterns have changed since the early months.

I generally refrain from speculation about the reasons for each county’s performance in this post and concentrated on simple language: above vs below average and a month to month comparison.


Google sheet with all cities and Google sheet of WA counties

Subreddit with daily reports from various contributors