
Or put another way, the 142 most populous counties contain 165,858,193 people and the remaining 3,001 counties contain 165,591,088 people according to the 2020 US Census.
This is not really unique to the US, you can find similar maps for Canada and Australia here.
However, where it does become important is when it comes to politics.
Here’s a county level map of the 2020 presidential election:

Without knowing that half the country lives in fewer than 5% of counties, you’d think Trump had won a huge landslide, but in fact it was the reverse. You can read more on the topic:
- 2020 US Presidential Election Map By County & Vote Share
- 2020 US Presidential Election Map: Biden vs Trump
- If These 3 Counties Did Not Exist, Trump Would Have Beaten Biden In 2020
- If “Did Not Vote” Had Been A Candidate In The 2020 US Presidential Election
- 2016 US Presidential Election Maps By Population Vs Land Area
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