On a forum I follow, someone posted the ranking of large metros by urban density based on recently released ACS data. Portland was #10. Top 10 are as follows:
- SF @ 7,626 ppsm
- LA @ 7,476 ppsm
- SJ @ 6,436 ppsm
- NYC @ 5,981 ppsm
- Vegas @ 5,046 ppsm
- Miami @ 4,885
- San Diego @ 4,550
- Denver @ 4,168
- Sacramento @ 4,163
- Portland @ 4,052