list of counties casting over 10,000 votes where Bush's margin grew by at least 10% in 2004

Here, we composed a list of the counties in which Trump increased his margin by at least 6% in 2020. There are 42 counties on that list. 

In 2004, George W. Bush increased his margin by at least 6% in a large number of counties casting at least 10,000 votes. These are counties where he increased his margin by at least 10%.

ALABAMA (29)
Morgan, AL (47,007) +16.2%
Calhoun, AL (45,249) +15.9%
Etowah, AL (42,680) +18.1%
Cullman, AL (35,191) +21.5%
Marshall, AL (31,491) +21.7%
Talladega, AL (29,898) +13.3%
St Clair, AL (29,161) +17.7%
Limestone, AL (29,073) +14.4%
Elmore, AL (28,710) +11.7%
Walker, AL (28,367) +28.5%
DeKalb, AL (24,169) +13.2%
Colbert, AL (23,935) +10.9% [Muscle Shoals]
Blount, AL (21,504) +19.8%
Jackson, AL (20,321) +14.3%
Autauga, AL (20,081) +11.0%
Dale, AL (18,231) +14.1%
Tallapoosa, AL (17,952) +16.3%
Coffee, AL (17,616) +17.9%
Chilton, AL (16,693) +19.4%
Covington, AL (14,627) +19.4%
Lawrence, AL (14,001) +16.4%
Chambers, AL (13,032) +14.0%
Marion, AL (12,875) +20.5%
Escambia, AL (12,395) +16.9%
Franklin, AL (12,269) +14.0%
Pike, AL (11,883) +10.3%
Barbour, AL (10,777) +10.8%
Geneva, AL (10,520) +19.3%
Winston, AL (10,423) +16.6%

ARIZONA (4)
Pinal, AZ (64,622) +14.0%
Mohave, AZ (57,915) +12.4%
Gila, AZ (20,877) +11.1%
Graham, AZ (10,720) +12.5%

ARKANSAS (1)
Lonoke (22,030) +10.7%

CALIFORNIA (3)
Riverside, CA (557,579) +10.3%
San Bernardino, CA (523,276) +10.2%
Kings, CA (32,110) +12.9%

DELAWARE (2)
Sussex (77,752) +14.5%
Kent (55,991) +11.1%

FLORIDA (10)
Pasco, FL (190,916) +10.4%
Sumter, FL (31,842) +14.6%
Putnam, FL (30,973) +13.8%
Columbia, FL (24,991) +13.9%
Walton, FL (23,976) +11.6%
Levy, FL (16,652) +14.5%
Suwannee, FL (15,802) +10.4%
Okeechobee, FL (12,190) +10.2%
Bradford, FL (10,855) +12.8%
Washington, FL (10,366) +15.6%

GEORGIA (22)
Hall, GA (49,792) +13.5%
Coweta, GA (42,609) +10.1%
Paulding, GA (40,514) +11.0%
Carroll, GA (35,347) +12.0%
Floyd, GA (31,676) +13.8%
Bartow, GA (30,291) +16.5%
Walton, GA (27,647) +17.5%
Catoosa, GA (22,341) +10.4%
Walker, GA (21,502) +11.9%
Barrow, GA (17,750) +17.8%
Jackson, GA (16,202) +18.1%
Effingham, GA (16,182) +16.6%
Gordon, GA (15,797) +16.3%
Habersham, GA (13,276) +12.1%
Polk, GA (12,420) +20.1%
Harris, GA (12,362) +13.4%
Coffee, GA (12,333) +12.2%
Ware, GA (11,291) +11.1%
Murray, GA (10,700) +11.2%
Pickens, GA (10,639) +16.8%
Haralson, GA (10,209) +23.7%
Gilmer, GA (10,023) +12.3%

ILLINOIS (9)
Macon, IL (51,746) +10.1%
Vermilion, IL (33,714) +10.7%
Adams, IL (31,477) +15.1%
Williamson, IL (29,960) +14.7%
Franklin, IL (19,352) +17.0%
Christian, IL (15,267) +14.2%
Iroquois, IL (13,835) +12.1%
Saline, IL (11,814) +15.6%
Shelby, IL (10,577) +10.4%

INDIANA (17)
Madison, IN (54,855) +10.7%
Delaware, IN (47,939) +11.1%
Clark, IN (42,337) +10.7%
Grant, IN (27,460) +13.0%
Warrick, IN (26,025) +10.6%
Henry, IN (20,504) +14.5%
Jackson, IN (16,309) +11.3%
Shelby, IN (16,027) +15.4%
Knox, IN (15,746) +13.0%
Gibson, IN (14,614) +11.6%
Montgomery, IN (14,548) +12.5%
Cass, IN (13,931) +11.3%
Wabash, IN (13,602) +10.6%
Posey, IN (11,986) +12.7%
Clinton, IN (11,877) +11.4%
White, IN (10,366) +11.6%
Decatur, IN (10,199) +12.6%

KANSAS (7)
Butler, KS (26,280) +10.2%
Saline, KS (22,518) +10.05%
Cowley, KS (14,447) +13.8%
Montgomery, KS (14,116) +10.2%
Miami, KS (14,016) +12.0%
Barton, KS (11,547) +12.3%
Sumner, KS (10,488) +11.2%

KENTUCKY (13)
Hardin, KY (36,441) +10.4%
McCracken, KY (29,797) +10.5%
Bullitt, KY (28,627) +10.5%
Christian, KY (21,015) +10.5%
Hopkins, KY (18,843) +14.5%
Henderson, KY (18,701) +14.9%
Graves, KY (16,229) +10.4%
Whitley, KY (13,629) +12.0%
Knox, KY (12,028) +11.7%
Harlan, KY (11,070) +24.7%
Bell, KY (11,002) +15.3%
Meade, KY (10,951) +12.3%
Logan, KY (10,644) +12.9%

LOUISIANA (15)
Calcasieu, LA (79,698) +11.0%
Livingston, LA (44,253) +16.8%
Bossier, LA (42,705) +10.06%
Tangipahoa, LA (42,135) +13.3%
Terrebonne, LA (40,574) +12.5%
Ascension, LA (39,100) +16.3%
Lafourche, LA (37,864) +10.5%
St Bernard (29,838) +16.3%
St Charles (23,837) +10.5%
Washington (17,841) +15.6%
Vernon, LA (15,229) +16.0%
Beauregard, LA (13,281) +11.7%
Jefferson Davis, LA (13,007) +11.1%
Plaquemines, LA (12,153) +13.1%
Union, LA (10,718) +13.3%

MARYLAND (6)
Wicomico (37,503) +12.4%
Allegany (29,855) +13.9%
Worcester (25,229) +13.0%
Queen Anne's (21,794) +11.9%
Dorchester (13,339) +12.5%
Caroline (11,356) +10.2%

MISSISSIPPI (5)
Pearl River (19,121) +11.1%
Hancock (17,550) +10.7%
Marion (11,732) +10.1%
Pontotoc (11,061) +11.4%
Union (10,199) +14.7%

MISSOURI (19)
Cole (36,701) +10.7%
Christian (31,348) +11.8%
Camden (19,519) +11.3%
Taney (19,280) +11.2%
Callaway (17,773) +15.6%
Scott (17,448) +14.0%
Butler (16,441) +14.1%
Lawrence (15,806) +10.7%
Webster (14,944) +10.2%
Stoddard (13,252) +13.8%
Marion (12,453) +12.8%
Polk (12,453) +11.2%
Pulaski (12,221) +15.5%
Dunklin (11,677) +11.0%
Henry (10,877) +10.7%
Miller (10,831) +15.6%
Ray (10,788) +10.6%
Audrain (10,683) +11.5%
Randolph (10,198) +21.1%

NEBRASKA (2)
Lincoln (16,199) +11.4%
Cass (11,529) +11.7%

NEW JERSEY (5)
Monmouth (299,939) +14.7%
Ocean (256,467) +19.6%
Cape May (50,762) +11.1%
Warren (48,208) +10.2%
Salem (29,781) +12.1%

NEW MEXICO (2)
Eddy (20,270) +13.5%
Lea (18,181) +15.0%

NEW YORK (3)
Staten Island (160,143) +20.6%
Rockland (131,231) +17.9%
Montgomery (21,221) +10.3%

NORTH CAROLINA (2)
Brunswick (37,977) +13.2%
Columbus (21,191) +10.9%

OHIO (3)
Shelby (22,855) +12.4%
Mercer (20,890) +10.6%
Van Wert (14,827) +10.5%

OKLAHOMA (26)
Rogers (36,898) +11.6%
Comanche (33,192) +10.07%
Creek (28,777) +14.9%
Wagoner (28,238) +13.2%
Muskogee (27,709) +12.0%
Pottawatomie (25,853) +13.2%
Garfield (23,271) +13.5%
Grady (20,106) +16.0%
Osage (19,535) +13.6%
Stephens (19,161) +17.3%
Carter (18,644) +12.4%
Pittsburg (18,586) +14.3%
Le Flore (17,424) +11.4%
Mayes (16,879) +14.2%
Logan (16,343) +11.8%
Okmulgee (15,730) +16.9%
Delaware (15,608) +12.6%
Pontotoc (14,812) +15.3%
Sequoyah (14,775) +10.3%
Bryan (14,360) +15.5%
Lincoln (14,190) +15.3%
McClain (13,783) +16.5%
Ottawa (12,529) +19.0%
Garvin (11,317) +20.8%
Custer (10,640) +12.4%
Caddo (10,407) +18.7%

PENNSYLVANIA (2)
Greene (15,565) +10.6%
Clinton (13,967) +11.2%

SOUTH CAROLINA (2)
Horry (81,217) +10.02%
Lancaster (19,179) +11.4%

TENNESSEE (43)
Rutherford (84,409) +14.5%
Williamson (79,650) +10.3%
Sullivan (62,639) +14.7%
Sumner (61,968) +19.3%
Montgomery (48,998) +15.3%
Blount (48,712) +11.2%
Washington (45,006) +12.3%
Wilson (44,452) +24.3%
Anderson (31,682) +13.8%
Sevier (30,970) +10.1%
Maury (30,043) +13.7%
Putnam (26,442) +17.1%
Robertson (25,323) +24.3%
Greene (24,194) +13.9%
Cumberland (23,637) +11.3%
Roane (23,338) +16.4%
Hamblen (22,318) +11.2%
Carter (22,313) +13.8%
Hawkins (20,233) +14.1%
Coffee (20,167) +17.3%
Loudon (19,864) +15.4%
Dickson (19,298) +18.7%
Gibson (19,221) +13.0%
Jefferson (17,215) +11.3%
Franklin (17,077) +16.4%
Lawrence (16,658) +13.5%
Cheatham (15,697) +21.6%
Monroe (15,568) +13.8%
Fayette (14,737) +10.3%
Warren (14,400) +17.7%
Campbell (14,118) +17.7%
Dyer (13,809) +15.6%
Bedford (13,706) +24.4%
Obion (13,535) +16.2%
Weakley (13,496) +11.9%
Henry (13,177) +13.4%
Lincoln (12,457) +22.9%
Cocke (12,311) +12.8%
Carroll (11,757) +11.0%
Giles (11,537) +19.1%
Marion (11,492) +10.4%
Rhea (11,054) +10.6%
Marshall (10,615) +21.1%

TEXAS (17)
Johnson (47,422) +10.1%
Wichita (45,545) +11.0%
Parker (40,957) +11.2%
Ector (36,310) +11.2%
Liberty (21,691) +11.3%
San Patricio (21,320) +12.0%
Wise (20,031) +12.7%
Van Zandt (19,856) +11.2%
Lamar (17,470) +11.0%
Anderson (16,301) +10.2%
Navarro (16,034) +12.4%
Cherokee (15,839) +10.2%
Wilson (14,885) +10.3%
Brown (14,253) +13.9%
Hopkins (12,062) +11.6%
Fannin (11,960) +13.5%
Palo Pinto (10,014) +16.5%

UTAH (3)
Weber (72,691) +12.2%
Box Elder (18,368) +10.7%
Tooele (17,663) +17.8%

VIRGINIA (4)
Washington (22,514) +10.5%
Wise (14,312) +17.0%
Smyth (12,319) +15.7%
Russell (11,423) +11.5%

WEST VIRGINIA (2)
Harrison (30,242) +12.9%
Raleigh (29,774) +15.7%