Another update
2015 County GDP $20B+
Los Angeles, CA $691.948 Billion
New York, NY $690.040 Billion
Harris, TX $395.784 Billion
Cook, IL $382.626 Billion
King, WA $262.665 Billion
Santa Clara, CA $262.053 Billion
Orange, CA $260.660 Billion
Dallas, TX $245.923 Billion
Maricopa, AZ $215.381 Billion
San Diego, CA $214.056 Billion
Fulton, GA $157.352 Billion
San Francisco, CA $154.176 Billion
Middlesex, MA $147.992 Billion
Miami-Dade, FL $141.734 Billion
Suffolk, MA $135.075 Billion
Hennepin, MN $134.207 Billion
Washington, DC $125.434 Billion
Alameda, CA $112.676 Billion
Philadelphia, PA $110.339 Billion
Oakland, MI $108.836 Billion
Tarrant, TX $108.496 Billion
Mecklenburg, NC $108.173 Billion
Clark, NV $104.761 Billion
Bexar, TX $101.462 Billion
Fairfax, VA $100.218 Billion
San Mateo, CA $99.019 Billion
Cuyahoga, OH $97.421 Billion
Broward, FL $96.519 Billion
Travis, TX $95.123 Billion
Fairfield, CT $93.957 Billion
Montgomery, MD $91.701 Billion
Franklin, OH $91.683 Billion
Nassau, NY $90.762 Billion
Orange, FL $89.817 Billion
Allegheny, PA $89.047 Billion
Marion, IN $88.508 Billion
DuPage, IL $87.146 Billion
Wayne, MI $87.017 Billion
Suffolk, NY $84.761 Billion
Montgomery, PA $81.404 Billion
Sacramento, CA $80.956 Billion
Queens, NY $80.882 Billion
Hartford, CT $79.802 Billion
Salt Lake, UT $79.721 Billion
St Louis, MO $78.587 Billion
Hillsborough, FL $77.093 Billion
Palm Beach, FL $76.866 Billion
Westchester, NY $75.894 Billion
Denver, CO $75.738 Billion
San Bernardino, CA $74.457 Billion
Hamilton, OH $73.204 Billion
Contra Costa $72.356 Billion
Riverside, CA $71.921 Billion
Bergen, NJ $68.910 Billion
Kings, NY $68.430 Billion
Wake, NC $67.768 Billion
Honolulu, HI $64.696 Billion
Shelby, TN $63.196 Billion
Lake, IL $64.208 Billion
Davidson, TN $61.728 Billion
Middlesex, NJ $60.757 Billion
Duval, FL $60.146 Billion
Milwaukee, WI $56.860 Billion
Morris, NJ $55.713 Billion
Collin, TX $55.558 Billion
Oklahoma, OK $54.586 Billion
Jeffersom, KY $53.082 Billion
Essex, NJ $52.975 Billion
Ventura, CA $52.597 Billion
Erie, NY $51.589 Billion
Norfolk, MA $50.941 Billion
Tulsa, OK $50.334 Billion
Balitmore, MD $49.403 Billion
New Castle, DE $49.375 Billion
Jackson, MO $46.585 Billion
New Haven, CT $45.142 Billion
Monroe, NY $44.497 Billion
Johnson, KS $44.483 Billion
Baltimore(City), MD $44.334 Billion
Anne Arundel, MD $44.269 Billion
Cobb, GA $44.138 Billion
Pinellas, FL $44.125 Billion
Gwinnett, GA $43.473 Billion
Dane, WI $43.394 Billion
Arapahoe, CO $43.330 Billion
Washington, OR $43.040 Billion
Douglas, NE $43.024 Billion
Chester, PA $42.967 Billion
Jefferson, AL $42.641 Billion
Polk, IA $42.225 Billion
Kern, CA $42.087 Billion
Fresno, CA $40.842 Billion
Durham, NC $39.710 Billion
Kent, MI $39.705 Billion
Essex, MA $39.673 Billion
Ramsey, MN $39.320 Billion
Somerset, NJ $39.316 Billion
Prince George's, MD $38.782 Billion
Union, NJ $38.320 Billion
Arlington, VA $38.277 Billion
Pima, AZ $37.022 Billion
Snohomish, WA $36.838 Billion
Bernalillo, NM $35.651 Billion
Macomb, MI $35.254 Billion
DeKalb, GA $35.110 Billion
Providence, RI $34.338 Billion
Pierce, WA $34.050 Billion
Guilford, NC $33.832 Billion
East Baton Rouge, LA $33.515 Billion
Monmouth, NJ $32.766 Billion
Bronx, NY $31.177 Billion
St Louis(City), MO $31.058 Billion
Bucks, PA $30.862 Billion
El Paso, CO $30.633 Billion
Waukesha, WI $30.218 Billion
Pulaski, AR $29.087 Billion
Delaware, PA $28.937 Billion
Summit, OH $28.494 Billion
Albany, NY $28.447 Billion
Onondaga, NY $28.411 Billion
El Paso, TX $28.123 Billion
Will, IL $28.042 Billion
Greenville, SC $27.953 Billion
Denton, TX $27.820 Billion
Charleston, SC $27.578 Billion
Sedgwick, KS $27.331 Billion
Virginia Beach, VA $26.763 Billion
Henrico, VA $26.571 Billion
San Joaquin, CA $26.492 Billion
Lancaster, PA $26.274 Billion
Jefferson, CO $26.043 Billion
Montgomery, OH $26.025 Billion
Hillsborough, NH $26.005 Billion
Sonoma, CA $25.323 Billion
Knox, TN $25.144 Billion
Lucas, OH $25.005 Billion
Kane, IL $24.344 Billion
Worcester, MA $24.321 Billion
Lehigh, PA $24.320 Billion
Anchorage, AK $24.240 Billion
Loudoun, VA $24.236 Billion
Dakota, MN $24.106 Billion
Ada, ID $24.060 Billion
Boulder, CO $24.023 Billion
Washoe, NV $24.013 Billion
Lee, FL $23.806 Billion
Howard, MD $23.643 Billion
Hamilton, TN $23.511 Billion
Montgomery, MD $23.451 Billion
Richland, SC $23.401 Billion
Jefferson, TX $23.039 Billion
Midland, TX $22.959 Billion
Norfolk, VA $22.852 Billion
Forsyth, NC $22.792 Billion
Orleans, LA $22.748 Billion
Camden, NJ $22.728 Billion
Madison, AL $22.603 Billion
Dauphin, PA $22.548 Billion
Jefferson, LA $21.911 Billion
Monterey, CA $21.836 Billion
Lake, IN $21.821 Billion
Des Moines, IA $21.677 Billion
Adams, CO $21.590 Billion
Washtenaw, MI $21.506 Billion
Fort Bend, TX $21.303 Billion
Solano, CA $21.213 Billion
Williamson, TX $21.135 Billion
Marin, CA $21.128 Billion
Ocean, NJ $20.932 Billion
Rockland, NY $20.909 Billion
Hampden, MA $20.830 Billion
Cumberland, ME $20.821 Billion
Fayette, KY $20.717 Billion
Spokane, WA $20.689 Billion
Neuces, TX $20.594 Billion
Utah, UT $20.508 Billion
Richmond, VA $20.504 Billion
Brevard, FL $20.453 Billion
Placer, CA $20.215 Billion
Passaic, NJ $20.165 Billion
Stanislaus, CA $20.104 Billion