Here is Washington County
Banks: Trump 53.74% - Biden 40.98%
Beaverton: Biden 72.3% - Trump 24.41%
Cornelius: Biden 58.94% - Trump 37.73%
Durham: Biden 67.79% - Trump 28.72%
Forest Grove: Biden 55.29% - Trump 40.59%
Gaston: Trump: 57.18% - Biden 38.51%
Hillsboro: Biden 63.56% - Trump 32.41%
King City: Biden 60.24% - Trump 36.82%
North Plains: Biden 52.12% - Trump 44.3%
Sherwood: Biden: 56.62% - Trump 39.66%
Tigard: Biden 66.25% - Trump 30.27%
Tualatin: Biden 62.37% - Trump 33.5%
Yeah I noticed North Plains flipped from Trump to Biden when looking at the State Gov't and NY Times precinct maps. The NYT map says Trump won ~44% both times, so the net swing towards Biden was from 2016 3rd party voters.
Most of Trump's support came from the rural unincorporated parts. King City was interesting as it is a planned seniors community with average age of 76 and 80% over 65 yet still voted pretty strongly for Biden. One of the reasons I figured Portland was so Democratic is it is the youngest metro area in US and younger Americans tend to lean more in progressive direction while far from unanimous, seniors due to lean right. Its one of the big reasons despite being more urbanized than most of the country and slightly less white, Florida still often votes GOP.
Source? I have no hard data to back this up, but I feel like Salt Lake City would be younger. Portland doesn't strike me as a particularly young metro area, it's just really white and slightly less boujee than Seattle.