More info:
According to Demographia, there are 847 urbanized areas in the world with populations above 500,000. When ranked by population density, the highest ranked US city is Los Angeles, at No. 724 (with 6,100/sq. mi). Tulsa is no. 826 (tied with Richmond, Va, Sarasota FL, Albany, NY, and Grand Rapids MI), with 2,000/sq. mi.). No. 847 is Knoxville, TN, with 1,300/sq. mi.
http://www.demographia.com/db-worldua.pdfCities in our region:
Denver: 2,374,203 - 3,554.4/sq. mi
New Orleans: 899,703 - 3,578.9/sq. mi
El Paso: 803,086 - 3,205.0/sq. mi
Houston: 4,944,332 - 2978.5/sq. mi
Colorado Springs: 559,409 - 2,978.2/sq. mi
Albuquerque: 1,362,416 - 2958.5/sq. mi
San Antonio: 1,758,210 - 2,944.6/sq. mi
Dallas-Fort Worth: 5,121,892 - 2878.9/sq. mi
Wichita: 472,870 - 2857.4/sq. mi
Omaha: 725,008 - 2,673.3/sq. mi
Austin: 1,362,416 - 2604.8/sq. mi
St. Louis: 2,150,706 - 2,328.5/sq. mi
Kansas City: 1,519,417 - 2,241.6/sq. mi
Memphis: 1,060,061 - 2,131.6/sq. mi
Oklahoma City: 861,505 - 2,098.0/sq. mi
Tulsa: 655,479 - 1951.3/sq. mi
Nashville: 969,587 - 1,720.7/sq. mi
Little Rock: 431,388 - 1,670.0/sq. mi
Baton Rouge: 594,309 - 1,620.3/sq. mi
Birmingham: 749,495 - 1,414.4/sq. mi
US URBANIZED AREAS OVER 500,000 RANKED BY POPULATION DENSITY:
1. Los Angeles 6,100/sq. mi.
2. San Francisco 5,400
3. Las Vegas 4,800
4. Honolulu 4,700
5. New York 4,600
6. Miami 4,500
7. San Diego 4,100
8. Fresno 3,900
9. Sacramento 3,800
Salt Lake City 3,800
Bakersfield 3,800
12. Denver 3,700
13. Portland 3,600
New Orleans 3,600
15. Washington DC 3,500
16. Chicago 3,400
17. Phoenix 3,200
El Paso 3,200
19. Seattle 3,100
Baltimore 3,100
San Antonio 3,100
22. Houston 3,000
Albuquerque 3,000
Colorado Springs 3,000
25. DFW 2,900
26. Philadelphia 2,800
Detroit 2,800
Virginia Beach 2,800
29. Austin 2,700
Columbus 2,700
Omaha 2,700
32. MSP 2,600
Tampa 2,600
34. Orlando 2,500
Milwaukee 2,500
Ogden, UT 2,500
37. St. Louis 2,400
Buffalo 2,400
Tucson 2,400
40. Cleveland 2,300
Kansas City 2,300
42. Boston 2,200
Indianapolis 2,200
Providence RI 2,200
Memphis 2,200
Rochester NY 2,200
47. Cincinnati 2,100
Jacksonville 2,100
Louisville 2,100
Oklahoma City 2,100
McAllen TX 2,100
Dayton OH 2,100
Toldeo OH 2,100
54. Richmond, VA 2,000
Tulsa 2,000
Sarasota FL 2,000
Albany NY 2,000
Grand Rapids 2,000
59. Pittsburgh 1,900
Allentown PA 1,900
Charleston, SC 1,900
62. Atlanta GA 1,800
Charlotte NC 1,800
Nashville 1,800
Raleigh NC 1,800
Hartford CT 1,800
Springfield MA 1,800
Akron OH 1,800
70. Baton Rouge 1,600
Cape Coral FL 1,600
72. Columbia SC 1,500
73. Birmingham 1,400
74. Knoxville TN 1,300