Top 25 Counties in the U.S. ranked by Largest Population Growth, 1990-2000 County, State Number Rank ------------------------------------------------------- Maricopa, AZ 950,048 1 Los Angeles, CA 656,286 2 Clark, NV 634,397 3 Harris, TX 582,477 4 Orange, CA 435,621 5 Riverside, CA 374,974 6 Broward, FL 367,487 7 Dallas, TX 366,208 8 Dade, FL 316,168 9 San Diego, CA 315,817 10 San Bernardino, CA 291,054 11 Queens, NY 277,781 12 Tarrant, TX 276,116 13 Cook, IL 271,697 14 Palm Beach, FL 267,681 15 Travis, TX 235,873 16 Gwinnett, GA 235,538 17 King, WA 229,729 18 Collin, TX 227,639 19 Orange, FL 218,853 20 Bexar, TX 207,537 21 Wake, NC 201,535 22 Hidalgo, TX 185,918 23 Santa Clara, CA 185,008 24 Mecklenburg, NC 184,243 25 Source: U.S. Census Bureau, County and City Data Book: 2000, Table B-1.