| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Los Angeles County [CA] | 38,633 | 1,957 | 6,026 | 616 |
| New York County [NY] | 34,796 | 2,103 | 6,163 | 854 |
| Broward County [FL] | 26,002 | 1,559 | 9,785 | 871 |
| Montgomery County [MD] | 22,054 | 1,644 | 5,941 | 703 |
| Kings County [NY] | 20,492 | 1,256 | 6,787 | 695 |
| Cook County [IL] | 18,595 | 1,359 | 3,943 | 550 |
| Middlesex County [MA] | 16,554 | 990 | 2,670 | 451 |
| Harris County [TX] | 16,036 | 1,231 | 3,619 | 721 |
| Miami-Dade County [FL] | 15,501 | 1,215 | 3,696 | 513 |
| Queens County [NY] | 14,274 | 1,295 | 3,949 | 534 |
| Hartford County [CT] | 12,996 | 833 | 2,673 | 338 |
| Bronx County [NY] | 12,814 | 1,197 | 5,783 | 734 |
| Palm Beach County [FL] | 12,362 | 1,182 | 3,474 | 512 |
| King County [WA] | 12,058 | 1,074 | 1,616 | 383 |
| Maricopa County [AZ] | 10,713 | 932 | 1,994 | 306 |
| Prince George s County [MD] | 10,366 | 1,178 | 2,396 | 465 |
| Worcester County [MA] | 9,649 | 785 | 2,080 | 476 |
| Hillsborough County [NH] | 9,472 | 678 | 1,994 | 301 |
| San Diego County [CA] | 9,216 | 787 | 1,630 | 290 |
| Westchester County [NY] | 9,144 | 1,133 | 1,510 | 368 |
| Santa Clara County [CA] | 9,062 | 978 | 1,491 | 254 |
| Suffolk County [MA] | 8,888 | 808 | 2,472 | 374 |
| San Francisco County [CA] | 8,811 | 892 | 1,235 | 267 |
| Philadelphia County [PA] | 8,634 | 1,135 | 2,797 | 565 |
| Essex County [NJ] | 8,498 | 1,057 | 2,622 | 419 |
| District of Columbia [DC] | 8,489 | 818 | 1,648 | 362 |
| Orange County [CA] | 8,483 | 836 | 1,461 | 303 |
| Providence County [RI] | 7,813 | 699 | 1,567 | 303 |
| Fairfax County [VA] | 7,693 | 757 | 1,744 | 314 |
| Fairfield County [CT] | 7,647 | 689 | 2,018 | 403 |
| Nassau County [NY] | 7,547 | 868 | 1,302 | 300 |
| Fulton County [GA] | 7,343 | 966 | 1,491 | 471 |
| Alameda County [CA] | 7,070 | 665 | 1,007 | 248 |
| Essex County [MA] | 6,474 | 686 | 1,173 | 266 |
| Dallas County [TX] | 6,306 | 718 | 1,887 | 411 |
| Gwinnett County [GA] | 6,185 | 1,086 | 951 | 289 |
| Tarrant County [TX] | 6,122 | 909 | 1,430 | 377 |
| Norfolk County [MA] | 6,092 | 716 | 966 | 245 |
| Clark County [NV] | 6,077 | 615 | 1,082 | 261 |
| New Haven County [CT] | 5,785 | 671 | 1,477 | 359 |
| Suffolk County [NY] | 5,780 | 873 | 1,456 | 440 |
| Franklin County [OH] | 5,768 | 810 | 1,749 | 471 |
| Orange County [FL] | 5,636 | 834 | 1,592 | 377 |
| Hennepin County [MN] | 5,566 | 622 | 882 | 215 |
| Pinellas County [FL] | 5,405 | 645 | 1,417 | 330 |
| Wayne County [MI] | 5,402 | 771 | 978 | 266 |
| Cobb County [GA] | 5,396 | 1,034 | 1,345 | 490 |
| Baltimore County [MD] | 5,311 | 778 | 1,092 | 300 |
| Wake County [NC] | 5,278 | 770 | 1,172 | 331 |
| DeKalb County [GA] | 5,180 | 793 | 1,047 | 297 |
| Riverside County [CA] | 5,070 | 634 | 958 | 222 |
| Oakland County [MI] | 4,789 | 507 | 832 | 192 |
| Mecklenburg County [NC] | 4,756 | 799 | 1,413 | 396 |
| Hillsborough County [FL] | 4,580 | 599 | 752 | 170 |
| Allegheny County [PA] | 4,503 | 554 | 1,012 | 213 |
| Bristol County [MA] | 4,320 | 527 | 771 | 243 |
| Travis County [TX] | 4,267 | 612 | 742 | 240 |
| Contra Costa County [CA] | 4,233 | 704 | 386 | 114 |
| Baltimore city [MD] | 4,130 | 762 | 1,069 | 356 |
| San Mateo County [CA] | 4,000 | 558 | 403 | 146 |
| Erie County [NY] | 3,970 | 419 | 805 | 222 |
| Hampden County [MA] | 3,965 | 545 | 882 | 223 |
| Marion County [IN] | 3,856 | 703 | 1,301 | 383 |
| Delaware County [PA] | 3,803 | 681 | 979 | 305 |
| Hudson County [NJ] | 3,797 | 605 | 1,158 | 324 |
| Hamilton County [OH] | 3,776 | 629 | 1,513 | 339 |
| Sacramento County [CA] | 3,704 | 538 | 523 | 178 |
| Bexar County [TX] | 3,451 | 515 | 741 | 290 |
| Union County [NJ] | 3,397 | 599 | 903 | 233 |
| Collin County [TX] | 3,384 | 585 | 450 | 176 |
| Cuyahoga County [OH] | 3,356 | 430 | 704 | 192 |
| Bergen County [NJ] | 3,346 | 483 | 586 | 145 |
| Montgomery County [PA] | 3,342 | 525 | 898 | 268 |
| St. Louis County [MO] | 3,267 | 467 | 547 | 149 |
| Pima County [AZ] | 3,228 | 525 | 658 | 245 |
| Multnomah County [OR] | 3,223 | 438 | 304 | 102 |
| Jefferson Parish [LA] | 3,177 | 431 | 558 | 158 |
| Lee County [FL] | 3,092 | 463 | 584 | 191 |
| Duval County [FL] | 3,083 | 519 | 854 | 251 |
| Monroe County [NY] | 3,028 | 490 | 523 | 178 |
| Fort Bend County [TX] | 3,017 | 929 | 412 | 223 |
| Arapahoe County [CO] | 2,951 | 549 | 739 | 248 |
| San Bernardino County [CA] | 2,925 | 465 | 603 | 185 |
| DuPage County [IL] | 2,800 | 489 | 528 | 191 |
| Honolulu County [HI] | 2,778 | 520 | 487 | 180 |
| Denver County [CO] | 2,753 | 553 | 495 | 209 |
| Ventura County [CA] | 2,727 | 481 | 521 | 237 |
| Shelby County [TN] | 2,719 | 508 | 688 | 275 |
| Collier County [FL] | 2,710 | 524 | 667 | 225 |
| New Castle County [DE] | 2,658 | 493 | 531 | 235 |
| Salt Lake County [UT] | 2,607 | 365 | 367 | 116 |
| Howard County [MD] | 2,519 | 694 | 429 | 190 |
| Milwaukee County [WI] | 2,485 | 419 | 415 | 132 |
| Mercer County [NJ] | 2,480 | 552 | 469 | 149 |
| Plymouth County [MA] | 2,450 | 394 | 480 | 145 |
| Guilford County [NC] | 2,430 | 622 | 963 | 471 |
| Anne Arundel County [MD] | 2,401 | 465 | 349 | 146 |
| Jefferson County [KY] | 2,308 | 559 | 617 | 247 |
| Ramsey County [MN] | 2,278 | 346 | 473 | 158 |
| Arlington County [VA] | 2,218 | 450 | 492 | 174 |
| Snohomish County [WA] | 2,207 | 399 | 405 | 186 |
| Albany County [NY] | 2,141 | 388 | 520 | 182 |
| Morris County [NJ] | 2,136 | 382 | 402 | 186 |
| Chester County [PA] | 2,134 | 338 | 427 | 157 |
| Lake County [IL] | 2,125 | 283 | 415 | 134 |
| Macomb County [MI] | 2,065 | 348 | 517 | 174 |
| Dane County [WI] | 2,051 | 394 | 236 | 102 |
| Bucks County [PA] | 2,035 | 331 | 394 | 126 |
| El Paso County [CO] | 2,028 | 398 | 188 | 77 |
| Sonoma County [CA] | 2,023 | 387 | 278 | 167 |
| Middlesex County [NJ] | 1,997 | 373 | 270 | 97 |
| Onondaga County [NY] | 1,965 | 333 | 413 | 156 |
| Bernalillo County [NM] | 1,963 | 369 | 174 | 92 |
| Pierce County [WA] | 1,908 | 321 | 377 | 136 |
| Virginia Beach city [VA] | 1,845 | 335 | 316 | 119 |
| Richmond County [NY] | 1,820 | 377 | 319 | 119 |
| Monmouth County [NJ] | 1,808 | 376 | 446 | 156 |
| Rockland County [NY] | 1,804 | 325 | 491 | 154 |
| Will County [IL] | 1,800 | 386 | 270 | 130 |
| Camden County [NJ] | 1,751 | 416 | 334 | 167 |
| Santa Barbara County [CA] | 1,741 | 318 | 177 | 90 |
| Johnson County [KS] | 1,698 | 326 | 300 | 117 |
| Washington County [OR] | 1,628 | 307 | 283 | 124 |
| Denton County [TX] | 1,623 | 360 | 147 | 83 |
| Washtenaw County [MI] | 1,612 | 288 | 443 | 188 |
| Loudoun County [VA] | 1,602 | 345 | 334 | 150 |
| Prince William County [VA] | 1,602 | 415 | 254 | 110 |
| Burlington County [NJ] | 1,589 | 352 | 263 | 116 |
| Placer County [CA] | 1,551 | 544 | 209 | 192 |
| Davidson County [TN] | 1,507 | 340 | 326 | 120 |
| Orange County [NY] | 1,505 | 352 | 236 | 122 |
| Dakota County [MN] | 1,379 | 304 | 195 | 80 |
| Ocean County [NJ] | 1,359 | 292 | 181 | 109 |
| Somerset County [NJ] | 1,288 | 312 | 318 | 189 |
| Washoe County [NV] | 1,267 | 277 | 217 | 114 |
| Oklahoma County [OK] | 1,254 | 315 | 167 | 87 |
| Kane County [IL] | 1,211 | 457 | 255 | 156 |
| Monterey County [CA] | 1,115 | 330 | 139 | 66 |
| Lancaster County [PA] | 1,082 | 315 | 206 | 119 |
| Henrico County [VA] | 1,079 | 238 | 329 | 122 |
| Anchorage Municipality [AK] | 1,058 | 285 | 128 | 106 |
| Polk County [IA] | 1,003 | 271 | 179 | 97 |
| Passaic County [NJ] | 1,001 | 316 | 180 | 147 |
| Solano County [CA] | 994 | 221 | 99 | 51 |
| Kern County [CA] | 972 | 348 | 215 | 163 |
| Clark County [WA] | 894 | 211 | 132 | 85 |
| San Joaquin County [CA] | 892 | 217 | 163 | 87 |
| Fresno County [CA] | 854 | 175 | 82 | 44 |
| Stanislaus County [CA] | 801 | 206 | 58 | 39 |
| Maui County [HI] | 740 | 250 | 207 | 107 |
| Atlantic County [NJ] | 730 | 256 | 198 | 123 |
| Hawaii County [HI] | 625 | 207 | 49 | 52 |
| Yolo County [CA] | 605 | 212 | 56 | 45 |
| San Juan County [NM] | 207 | 99 | 40 | 44 |
| Navajo County [AZ] | 86 | 89 | 13 | 22 |
| City / Metropolitan area / CBSA | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| New York-Newark-Jersey City [NY] | 141,784 | 3,948 | 35,513 | 1,726 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 59,814 | 2,432 | 14,027 | 1,057 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 53,865 | 2,224 | 16,955 | 1,084 |
| Los Angeles-Long Beach-Anaheim [CA] | 47,116 | 2,184 | 7,487 | 731 |
| Boston-Cambridge-Newton [MA-NH] | 46,443 | 2,155 | 8,788 | 795 |
| Lafayette [LA] | 44,794 | 1,488 | 6,324 | 564 |
| Atlanta-Sandy Springs-Roswell [GA] | 30,753 | 1,994 | 6,038 | 841 |
| Chicago-Naperville-Elgin [IL-IN] | 29,137 | 1,648 | 6,007 | 773 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 27,142 | 1,698 | 6,850 | 850 |
| San Francisco-Oakland-Hayward [CA] | 27,085 | 1,623 | 3,263 | 444 |
| Houston-The Woodlands-Sugar Land [TX] | 21,839 | 1,491 | 4,259 | 709 |
| Dallas-Fort Worth-Arlington [TX] | 18,438 | 1,441 | 4,145 | 580 |
| Seattle-Tacoma-Bellevue [WA] | 16,173 | 1,227 | 2,398 | 429 |
| Baltimore-Columbia-Towson [MD] | 15,747 | 1,629 | 3,176 | 541 |
| Hartford-West Hartford-East Hartford [CT] | 15,331 | 872 | 3,069 | 379 |
| Providence-Warwick [RI-MA] | 14,970 | 1,053 | 2,800 | 411 |
| Portland-South Portland [ME] | 13,992 | 843 | 2,733 | 401 |
| Tampa-St. Petersburg-Clearwater [FL] | 13,334 | 1,027 | 2,799 | 402 |
| Detroit-Warren-Dearborn [MI] | 13,246 | 1,035 | 2,392 | 381 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 12,105 | 894 | 2,176 | 333 |
| Phoenix-Mesa-Scottsdale [AZ] | 11,378 | 977 | 2,077 | 305 |
| Worcester [MA-CT] | 11,350 | 826 | 2,343 | 485 |
| New Orleans-Metairie [LA] | 10,563 | 797 | 1,933 | 320 |
| Orlando-Kissimmee-Sanford [FL] | 9,947 | 1,078 | 2,318 | 437 |
| Manchester-Nashua [NH] | 9,472 | 678 | 1,994 | 301 |
| San Diego-Carlsbad [CA] | 9,216 | 787 | 1,630 | 290 |
| San Jose-Sunnyvale-Santa Clara [CA] | 9,104 | 972 | 1,491 | 254 |
| Denver-Aurora-Lakewood [CO] | 8,969 | 876 | 1,689 | 401 |
| Baton Rouge [LA] | 8,586 | 805 | 1,192 | 245 |
| St. Louis [MO-IL] | 8,135 | 764 | 1,558 | 256 |
| Riverside-San Bernardino-Ontario [CA] | 7,995 | 764 | 1,561 | 238 |
| Bridgeport-Stamford-Norwalk [CT] | 7,647 | 689 | 2,018 | 403 |
| Charlotte-Concord-Gastonia [NC-SC] | 7,467 | 891 | 1,822 | 417 |
| Columbus [OH] | 7,409 | 907 | 2,005 | 511 |
| Portland-Vancouver-Hillsboro [OR-WA] | 7,382 | 608 | 998 | 204 |
| Cincinnati [OH-KY-IN] | 6,888 | 826 | 2,119 | 372 |
| Sacramento-Roseville-Arden-Arcade [CA] | 6,653 | 796 | 915 | 274 |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 6,580 | 715 | 1,387 | 295 |
| Pittsburgh [PA] | 6,374 | 619 | 1,447 | 262 |
| Austin-Round Rock [TX] | 6,260 | 777 | 998 | 280 |
| Indianapolis-Carmel-Anderson [IN] | 6,108 | 878 | 1,830 | 432 |
| Las Vegas-Henderson-Paradise [NV] | 6,077 | 615 | 1,082 | 261 |
| New Haven-Milford [CT] | 5,785 | 671 | 1,477 | 359 |
| Kansas City [MO-KS] | 5,719 | 627 | 1,385 | 296 |
| Raleigh [NC] | 5,489 | 819 | 1,178 | 332 |
| Springfield [MA] | 5,323 | 614 | 1,159 | 246 |
| New York-Newark-Jersey City [NY-NJ-PA] | 4,837 | 635 | 1,237 | 341 |
| Cleveland-Elyria [OH] | 4,779 | 530 | 889 | 207 |
| Albany-Schenectady-Troy [NY] | 4,641 | 511 | 1,084 | 244 |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 4,500 | 465 | 875 | 215 |
| Jacksonville [FL] | 4,432 | 566 | 1,085 | 269 |
| Milwaukee-Waukesha-West Allis [WI] | 4,278 | 570 | 560 | 161 |
| Rochester [NY] | 4,067 | 493 | 685 | 177 |
| San Antonio-New Braunfels [TX] | 3,754 | 526 | 778 | 296 |
| Richmond [VA] | 3,519 | 486 | 862 | 236 |
| Omaha-Council Bluffs [NE-IA] | 3,404 | 614 | 1,032 | 270 |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 3,347 | 624 | 627 | 175 |
| Tucson [AZ] | 3,228 | 525 | 658 | 245 |
| Louisville Jefferson County [KY] | 3,206 | 624 | 789 | 276 |
| Cape Coral-Fort Myers [FL] | 3,092 | 463 | 584 | 191 |
| Memphis [TN-MS-AR] | 2,930 | 521 | 688 | 275 |
| Durham-Chapel Hill [NC] | 2,907 | 495 | 528 | 156 |
| Urban Honolulu [HI] | 2,778 | 520 | 487 | 180 |
| Oxnard-Thousand Oaks-Ventura [CA] | 2,727 | 481 | 521 | 237 |
| Naples-Immokalee-Marco Island [FL] | 2,710 | 524 | 667 | 225 |
| Salt Lake City [UT] | 2,705 | 380 | 389 | 118 |
| Greensboro-High Point [NC] | 2,626 | 640 | 993 | 472 |
| Syracuse [NY] | 2,568 | 361 | 480 | 164 |
| Deltona-Daytona Beach-Ormond Beach [FL] | 2,529 | 405 | 506 | 153 |
| Albuquerque [NM] | 2,485 | 415 | 216 | 105 |
| Trenton [NJ] | 2,480 | 552 | 469 | 149 |
| Dayton [OH] | 2,477 | 418 | 740 | 250 |
| Oklahoma City [OK] | 2,291 | 499 | 383 | 129 |
| Madison [WI] | 2,246 | 421 | 245 | 102 |
| Colorado Springs [CO] | 2,058 | 400 | 188 | 77 |
| Santa Rosa [CA] | 2,023 | 387 | 278 | 167 |
| Allentown-Bethlehem-Easton [PA-NJ] | 1,884 | 318 | 527 | 192 |
| Santa Maria-Santa Barbara [CA] | 1,741 | 318 | 177 | 90 |
| Grand Rapids-Wyoming [MI] | 1,625 | 317 | 292 | 141 |
| Ann Arbor [MI] | 1,612 | 288 | 443 | 188 |
| Tulsa [OK] | 1,501 | 243 | 219 | 83 |
| Harrisburg-Carlisle [PA] | 1,480 | 324 | 431 | 165 |
| Akron [OH] | 1,415 | 290 | 189 | 83 |
| Lansing-East Lansing [MI] | 1,383 | 228 | 302 | 149 |
| Reno [NV] | 1,310 | 280 | 217 | 114 |
| Anchorage [AK] | 1,226 | 273 | 139 | 107 |
| Des Moines-West Des Moines [IA] | 1,133 | 284 | 201 | 101 |
| Salinas [CA] | 1,115 | 330 | 139 | 66 |
| Lancaster [PA] | 1,082 | 315 | 206 | 119 |
| Spokane-Spokane Valley [WA] | 1,066 | 214 | 256 | 93 |
| Vallejo-Fairfield [CA] | 994 | 221 | 99 | 51 |
| Bakersfield [CA] | 972 | 348 | 215 | 163 |
| Stockton-Lodi [CA] | 892 | 217 | 163 | 87 |
| Fresno [CA] | 854 | 175 | 82 | 44 |
| Modesto [CA] | 801 | 206 | 58 | 39 |
| Kahului-Wailuku-Lahaina [HI] | 741 | 250 | 208 | 107 |
| Atlantic City-Hammonton [NJ] | 730 | 256 | 198 | 123 |
| Hilo [HI] | 625 | 207 | 49 | 52 |
| Farmington [NM] | 207 | 99 | 40 | 44 |
| Show Low [AZ] | 86 | 89 | 13 | 22 |