| Country | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| United States | 908,314 | 10,777 | 282,138 | 5,947 |
| State | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| California | 156,029 | 4,001 | 44,934 | 2,040 |
| Texas | 90,466 | 3,602 | 25,693 | 1,747 |
| New York | 86,879 | 3,039 | 39,153 | 2,227 |
| New Jersey | 76,419 | 2,607 | 19,732 | 1,323 |
| Illinois | 51,963 | 2,443 | 16,079 | 1,227 |
| Virginia | 37,236 | 2,063 | 8,450 | 787 |
| Florida | 35,024 | 2,014 | 10,213 | 1,074 |
| Pennsylvania | 34,203 | 1,973 | 11,972 | 1,247 |
| Georgia | 27,285 | 2,137 | 7,854 | 977 |
| Massachusetts | 26,951 | 1,606 | 6,425 | 948 |
| Maryland | 25,518 | 1,779 | 6,310 | 880 |
| Washington | 24,557 | 1,813 | 7,360 | 1,127 |
| Michigan | 24,465 | 1,785 | 5,844 | 807 |
| North Carolina | 22,516 | 1,684 | 7,201 | 1,156 |
| Ohio | 21,798 | 1,546 | 5,556 | 679 |
| Minnesota | 18,333 | 1,810 | 7,831 | 1,178 |
| Connecticut | 15,932 | 1,492 | 4,542 | 652 |
| Arizona | 13,533 | 1,528 | 4,310 | 861 |
| Indiana | 11,524 | 1,121 | 6,055 | 852 |
| Missouri | 10,007 | 1,296 | 2,840 | 651 |
| Colorado | 9,628 | 1,089 | 3,350 | 644 |
| Wisconsin | 8,524 | 910 | 2,571 | 470 |
| Oregon | 8,053 | 1,102 | 2,753 | 679 |
| Tennessee | 7,446 | 946 | 2,282 | 483 |
| Oklahoma | 6,466 | 923 | 2,412 | 449 |
| Kansas | 5,738 | 772 | 2,102 | 531 |
| Kentucky | 5,080 | 783 | 2,135 | 575 |
| Iowa | 5,044 | 704 | 1,862 | 428 |
| Nebraska | 4,640 | 588 | 2,365 | 479 |
| Delaware | 4,521 | 626 | 801 | 219 |
| Alabama | 3,442 | 541 | 1,295 | 490 |
| Utah | 3,415 | 714 | 1,632 | 530 |
| South Carolina | 3,291 | 643 | 838 | 286 |
| Louisiana | 2,838 | 527 | 840 | 355 |
| New Hampshire | 2,771 | 550 | 465 | 158 |
| Nevada | 2,408 | 581 | 653 | 240 |
| Arkansas | 2,326 | 525 | 762 | 331 |
| Rhode Island | 1,480 | 408 | 635 | 291 |
| Idaho | 1,248 | 431 | 759 | 352 |
| South Dakota | 1,238 | 239 | 904 | 257 |
| New Mexico | 1,219 | 366 | 419 | 216 |
| Mississippi | 1,136 | 342 | 126 | 101 |
| District of Columbia | 964 | 282 | 199 | 131 |
| West Virginia | 930 | 269 | 131 | 63 |
| Maine | 807 | 411 | 310 | 178 |
| Hawaii | 769 | 299 | 338 | 256 |
| Alaska | 721 | 341 | 257 | 137 |
| North Dakota | 599 | 257 | 133 | 83 |
| Vermont | 507 | 255 | 301 | 189 |
| Wyoming | 248 | 132 | 61 | 55 |
| Montana | 179 | 108 | 93 | 61 |
| Puerto Rico | 6 | 12 | (B) | - |
| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Santa Clara County [CA] | 40,069 | 2,093 | 6,838 | 710 |
| Middlesex County [NJ] | 26,652 | 1,660 | 6,956 | 910 |
| Cook County [IL] | 25,498 | 2,084 | 9,179 | 1,134 |
| Los Angeles County [CA] | 24,289 | 1,640 | 9,074 | 916 |
| Alameda County [CA] | 23,576 | 1,666 | 6,172 | 728 |
| King County [WA] | 18,983 | 1,662 | 5,571 | 998 |
| Queens County [NY] | 18,608 | 1,565 | 9,264 | 1,223 |
| Dallas County [TX] | 17,240 | 1,449 | 5,625 | 770 |
| Fairfax County [VA] | 15,643 | 1,536 | 2,933 | 522 |
| Harris County [TX] | 15,531 | 1,437 | 5,110 | 864 |
| Maricopa County [AZ] | 11,975 | 1,438 | 3,709 | 788 |
| Nassau County [NY] | 11,941 | 1,288 | 4,307 | 645 |
| Sacramento County [CA] | 11,882 | 1,789 | 4,421 | 842 |
| Middlesex County [MA] | 11,801 | 1,039 | 2,664 | 569 |
| Fort Bend County [TX] | 10,955 | 1,270 | 2,773 | 524 |
| Oakland County [MI] | 10,827 | 1,033 | 2,037 | 405 |
| Kings County [NY] | 10,771 | 1,353 | 6,821 | 1,000 |
| Bergen County [NJ] | 10,370 | 1,066 | 3,408 | 563 |
| Collin County [TX] | 10,081 | 936 | 2,180 | 441 |
| Orange County [CA] | 9,455 | 1,252 | 2,308 | 479 |
| Montgomery County [MD] | 9,320 | 1,055 | 1,773 | 433 |
| DuPage County [IL] | 9,247 | 924 | 2,482 | 390 |
| Contra Costa County [CA] | 9,094 | 1,112 | 3,059 | 616 |
| San Diego County [CA] | 8,540 | 1,030 | 2,768 | 466 |
| Fulton County [GA] | 8,099 | 1,266 | 1,698 | 448 |
| Philadelphia County [PA] | 8,067 | 1,134 | 3,813 | 683 |
| Loudoun County [VA] | 7,553 | 774 | 1,129 | 274 |
| Wake County [NC] | 7,459 | 783 | 1,245 | 295 |
| Hennepin County [MN] | 6,521 | 920 | 2,095 | 592 |
| San Mateo County [CA] | 6,383 | 933 | 3,023 | 587 |
| Denton County [TX] | 6,290 | 893 | 1,153 | 313 |
| Travis County [TX] | 6,273 | 908 | 1,104 | 275 |
| Franklin County [OH] | 6,241 | 897 | 1,823 | 510 |
| Ramsey County [MN] | 6,238 | 1,078 | 4,601 | 941 |
| Hudson County [NJ] | 6,016 | 651 | 1,388 | 329 |
| Westchester County [NY] | 5,951 | 872 | 1,607 | 289 |
| Broward County [FL] | 5,904 | 947 | 2,254 | 708 |
| Hillsborough County [FL] | 5,741 | 808 | 1,437 | 374 |
| Somerset County [NJ] | 5,659 | 761 | 648 | 223 |
| Fairfield County [CT] | 5,571 | 794 | 1,598 | 425 |
| Allegheny County [PA] | 5,526 | 893 | 2,238 | 711 |
| Suffolk County [NY] | 5,521 | 774 | 2,384 | 508 |
| Hartford County [CT] | 5,231 | 878 | 1,485 | 414 |
| Gwinnett County [GA] | 5,164 | 784 | 1,302 | 393 |
| Mecklenburg County [NC] | 5,097 | 821 | 1,643 | 465 |
| Bexar County [TX] | 5,044 | 810 | 1,667 | 420 |
| Mercer County [NJ] | 4,884 | 877 | 698 | 238 |
| St. Louis County [MO] | 4,781 | 731 | 1,422 | 427 |
| Howard County [MD] | 4,742 | 718 | 775 | 354 |
| New York County [NY] | 4,718 | 565 | 1,105 | 337 |
| Norfolk County [MA] | 4,674 | 759 | 1,030 | 314 |
| Worcester County [MA] | 4,614 | 685 | 1,224 | 401 |
| Monroe County [NY] | 4,441 | 750 | 2,297 | 500 |
| Duval County [FL] | 4,318 | 890 | 1,482 | 592 |
| Henrico County [VA] | 4,301 | 755 | 1,103 | 306 |
| Erie County [NY] | 4,296 | 936 | 2,727 | 822 |
| Morris County [NJ] | 4,182 | 608 | 835 | 232 |
| Montgomery County [PA] | 4,178 | 679 | 952 | 271 |
| Tarrant County [TX] | 4,086 | 783 | 1,179 | 373 |
| New Castle County [DE] | 4,070 | 598 | 621 | 163 |
| Washington County [OR] | 3,954 | 805 | 853 | 383 |
| DeKalb County [GA] | 3,946 | 867 | 2,312 | 725 |
| Wayne County [MI] | 3,894 | 756 | 662 | 231 |
| Lake County [IL] | 3,890 | 569 | 717 | 207 |
| Passaic County [NJ] | 3,852 | 783 | 1,418 | 351 |
| Cobb County [GA] | 3,661 | 771 | 890 | 371 |
| Palm Beach County [FL] | 3,609 | 657 | 801 | 357 |
| San Francisco County [CA] | 3,593 | 690 | 1,634 | 405 |
| Baltimore County [MD] | 3,504 | 749 | 1,177 | 392 |
| Rockland County [NY] | 3,457 | 561 | 1,221 | 256 |
| New Haven County [CT] | 3,405 | 623 | 1,010 | 299 |
| Johnson County [KS] | 3,398 | 582 | 728 | 243 |
| Richmond County [NY] | 3,373 | 609 | 1,236 | 376 |
| Cuyahoga County [OH] | 3,336 | 644 | 873 | 256 |
| Chester County [PA] | 3,262 | 564 | 900 | 258 |
| Arapahoe County [CO] | 3,064 | 729 | 1,135 | 368 |
| Marion County [IN] | 3,035 | 815 | 2,263 | 780 |
| Monmouth County [NJ] | 2,920 | 535 | 578 | 175 |
| Will County [IL] | 2,855 | 637 | 399 | 211 |
| Miami-Dade County [FL] | 2,808 | 712 | 964 | 338 |
| Snohomish County [WA] | 2,735 | 595 | 758 | 250 |
| Salt Lake County [UT] | 2,732 | 675 | 1,277 | 505 |
| Delaware County [PA] | 2,729 | 589 | 973 | 319 |
| Bucks County [PA] | 2,633 | 490 | 759 | 201 |
| Prince George s County [MD] | 2,567 | 490 | 779 | 274 |
| Ventura County [CA] | 2,539 | 443 | 378 | 137 |
| Burlington County [NJ] | 2,506 | 515 | 779 | 246 |
| Multnomah County [OR] | 2,497 | 539 | 1,467 | 492 |
| Jefferson County [KY] | 2,421 | 650 | 1,028 | 451 |
| Camden County [NJ] | 2,400 | 576 | 1,057 | 459 |
| Dane County [WI] | 2,360 | 512 | 757 | 292 |
| Orange County [FL] | 2,289 | 538 | 576 | 212 |
| Macomb County [MI] | 2,268 | 501 | 593 | 198 |
| Oklahoma County [OK] | 2,226 | 722 | 760 | 281 |
| Washtenaw County [MI] | 2,213 | 410 | 396 | 135 |
| Milwaukee County [WI] | 2,180 | 548 | 1,015 | 351 |
| Union County [NJ] | 2,128 | 486 | 423 | 226 |
| Shelby County [TN] | 1,961 | 454 | 472 | 181 |
| Davidson County [TN] | 1,865 | 506 | 762 | 364 |
| Guilford County [NC] | 1,832 | 546 | 936 | 397 |
| Bronx County [NY] | 1,813 | 415 | 748 | 274 |
| San Bernardino County [CA] | 1,799 | 424 | 538 | 244 |
| Clark County [NV] | 1,777 | 436 | 553 | 197 |
| Essex County [NJ] | 1,766 | 469 | 569 | 229 |
| Dakota County [MN] | 1,750 | 418 | 166 | 73 |
| Hamilton County [OH] | 1,678 | 309 | 392 | 157 |
| Suffolk County [MA] | 1,642 | 457 | 457 | 208 |
| Albany County [NY] | 1,626 | 382 | 504 | 229 |
| Hillsborough County [NH] | 1,625 | 418 | 220 | 115 |
| Anne Arundel County [MD] | 1,586 | 391 | 398 | 148 |
| Polk County [IA] | 1,573 | 429 | 901 | 333 |
| Onondaga County [NY] | 1,532 | 469 | 1,051 | 426 |
| Denver County [CO] | 1,495 | 583 | 777 | 469 |
| San Joaquin County [CA] | 1,476 | 497 | 393 | 165 |
| Arlington County [VA] | 1,410 | 409 | 597 | 307 |
| Riverside County [CA] | 1,395 | 519 | 382 | 214 |
| Kane County [IL] | 1,353 | 462 | 423 | 216 |
| Hampden County [MA] | 1,286 | 445 | 652 | 288 |
| Pinellas County [FL] | 1,258 | 350 | 474 | 196 |
| Pima County [AZ] | 1,172 | 418 | 369 | 274 |
| Essex County [MA] | 1,133 | 325 | 190 | 122 |
| Yolo County [CA] | 1,045 | 525 | 394 | 206 |
| Placer County [CA] | 1,000 | 358 | 229 | 125 |
| Solano County [CA] | 991 | 406 | 361 | 203 |
| Prince William County [VA] | 984 | 362 | 240 | 155 |
| Providence County [RI] | 980 | 363 | 424 | 263 |
| District of Columbia [DC] | 964 | 282 | 199 | 131 |
| Fresno County [CA] | 953 | 254 | 313 | 147 |
| Kern County [CA] | 887 | 318 | 307 | 128 |
| Bristol County [MA] | 853 | 303 | 103 | 64 |
| Orange County [NY] | 843 | 362 | 267 | 172 |
| Baltimore city [MD] | 832 | 288 | 215 | 183 |
| Lancaster County [PA] | 764 | 473 | 543 | 451 |
| Atlantic County [NJ] | 761 | 337 | 273 | 154 |
| Bernalillo County [NM] | 753 | 323 | 259 | 193 |
| Honolulu County [HI] | 740 | 296 | 338 | 256 |
| Clark County [WA] | 654 | 301 | 362 | 190 |
| Lee County [FL] | 650 | 366 | 136 | 181 |
| Anchorage Municipality [AK] | 619 | 340 | 187 | 122 |
| Washoe County [NV] | 611 | 278 | 100 | 98 |
| Monterey County [CA] | 607 | 245 | 158 | 86 |
| Virginia Beach city [VA] | 592 | 223 | 162 | 106 |
| Pierce County [WA] | 555 | 174 | 137 | 65 |
| Ocean County [NJ] | 498 | 271 | 127 | 99 |
| Collier County [FL] | 407 | 398 | 189 | 231 |
| Santa Barbara County [CA] | 399 | 151 | 72 | 68 |
| El Paso County [CO] | 378 | 183 | (B) | - |
| Sonoma County [CA] | 353 | 190 | 92 | 97 |
| Jefferson Parish [LA] | 352 | 191 | 116 | 133 |
| Plymouth County [MA] | 344 | 168 | 25 | 32 |
| Stanislaus County [CA] | 178 | 169 | 52 | 79 |
| Hawaii County [HI] | 25 | 35 | (B) | - |
| Maui County [HI] | 4 | 7 | (B) | - |
| 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] | 132,875 | 3,658 | 45,690 | 2,270 |
| Chicago-Naperville-Elgin [IL-IN] | 44,489 | 2,382 | 13,761 | 1,189 |
| San Francisco-Oakland-Hayward [CA] | 42,942 | 2,124 | 13,968 | 1,196 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 41,457 | 2,300 | 8,638 | 859 |
| San Jose-Sunnyvale-Santa Clara [CA] | 40,076 | 2,096 | 6,838 | 710 |
| Dallas-Fort Worth-Arlington [TX] | 38,147 | 2,088 | 10,271 | 1,040 |
| Los Angeles-Long Beach-Anaheim [CA] | 33,744 | 2,090 | 11,382 | 977 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 30,952 | 1,924 | 10,229 | 1,018 |
| Houston-The Woodlands-Sugar Land [TX] | 29,987 | 2,247 | 8,406 | 1,130 |
| Atlanta-Sandy Springs-Roswell [GA] | 24,340 | 2,011 | 6,903 | 891 |
| Seattle-Tacoma-Bellevue [WA] | 22,273 | 1,768 | 6,466 | 1,047 |
| Boston-Cambridge-Newton [MA-NH] | 20,420 | 1,541 | 4,558 | 829 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 17,290 | 1,760 | 7,452 | 1,132 |
| Detroit-Warren-Dearborn [MI] | 17,115 | 1,504 | 3,305 | 540 |
| Sacramento-Roseville-Arden-Arcade [CA] | 14,186 | 1,832 | 5,085 | 835 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 12,321 | 1,199 | 4,019 | 833 |
| Phoenix-Mesa-Scottsdale [AZ] | 12,129 | 1,436 | 3,801 | 793 |
| Baltimore-Columbia-Towson [MD] | 11,268 | 1,179 | 2,702 | 566 |
| Austin-Round Rock [TX] | 9,018 | 1,048 | 1,605 | 333 |
| San Diego-Carlsbad [CA] | 8,540 | 1,030 | 2,768 | 466 |
| St. Louis [MO-IL] | 8,376 | 1,186 | 2,324 | 584 |
| Columbus [OH] | 8,113 | 983 | 2,143 | 522 |
| Portland-Vancouver-Hillsboro [OR-WA] | 7,782 | 1,163 | 2,919 | 696 |
| Tampa-St. Petersburg-Clearwater [FL] | 7,566 | 993 | 1,969 | 432 |
| Raleigh [NC] | 7,497 | 783 | 1,258 | 298 |
| Denver-Aurora-Lakewood [CO] | 6,994 | 943 | 2,728 | 616 |
| Charlotte-Concord-Gastonia [NC-SC] | 6,956 | 1,013 | 2,122 | 495 |
| Pittsburgh [PA] | 6,298 | 919 | 2,589 | 722 |
| Hartford-West Hartford-East Hartford [CT] | 5,896 | 911 | 1,586 | 418 |
| Bridgeport-Stamford-Norwalk [CT] | 5,571 | 794 | 1,598 | 425 |
| Richmond [VA] | 5,382 | 780 | 1,536 | 380 |
| San Antonio-New Braunfels [TX] | 5,145 | 836 | 1,716 | 437 |
| Kansas City [MO-KS] | 5,071 | 690 | 1,565 | 446 |
| Trenton [NJ] | 4,884 | 877 | 698 | 238 |
| Worcester [MA-CT] | 4,815 | 710 | 1,307 | 398 |
| Cincinnati [OH-KY-IN] | 4,778 | 679 | 860 | 235 |
| Indianapolis-Carmel-Anderson [IN] | 4,775 | 910 | 2,436 | 785 |
| Jacksonville [FL] | 4,690 | 896 | 1,516 | 590 |
| Rochester [NY] | 4,504 | 761 | 2,328 | 509 |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 4,396 | 941 | 2,768 | 835 |
| Milwaukee-Waukesha-West Allis [WI] | 4,267 | 718 | 1,390 | 366 |
| Orlando-Kissimmee-Sanford [FL] | 3,967 | 799 | 1,141 | 355 |
| Oklahoma City [OK] | 3,857 | 809 | 1,132 | 317 |
| Cleveland-Elyria [OH] | 3,754 | 649 | 938 | 260 |
| Omaha-Council Bluffs [NE-IA] | 3,663 | 585 | 1,958 | 491 |
| New Haven-Milford [CT] | 3,405 | 623 | 1,010 | 299 |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 3,316 | 633 | 1,259 | 403 |
| Riverside-San Bernardino-Ontario [CA] | 3,194 | 644 | 920 | 308 |
| Durham-Chapel Hill [NC] | 2,873 | 713 | 1,017 | 418 |
| Albany-Schenectady-Troy [NY] | 2,856 | 502 | 769 | 249 |
| Salt Lake City [UT] | 2,733 | 674 | 1,277 | 505 |
| Louisville Jefferson County [KY] | 2,630 | 661 | 1,093 | 449 |
| Oxnard-Thousand Oaks-Ventura [CA] | 2,539 | 443 | 378 | 137 |
| Madison [WI] | 2,366 | 511 | 757 | 292 |
| Providence-Warwick [RI-MA] | 2,333 | 556 | 738 | 310 |
| Ann Arbor [MI] | 2,213 | 410 | 396 | 135 |
| Dayton [OH] | 2,064 | 415 | 566 | 203 |
| Memphis [TN-MS-AR] | 1,992 | 460 | 472 | 181 |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 1,928 | 424 | 551 | 243 |
| Tulsa [OK] | 1,887 | 384 | 1,002 | 241 |
| Des Moines-West Des Moines [IA] | 1,886 | 459 | 954 | 341 |
| Greensboro-High Point [NC] | 1,878 | 546 | 936 | 397 |
| Lansing-East Lansing [MI] | 1,778 | 471 | 695 | 260 |
| Las Vegas-Henderson-Paradise [NV] | 1,777 | 436 | 553 | 197 |
| Springfield [MA] | 1,664 | 467 | 689 | 304 |
| Harrisburg-Carlisle [PA] | 1,643 | 314 | 414 | 158 |
| Manchester-Nashua [NH] | 1,625 | 418 | 220 | 115 |
| Syracuse [NY] | 1,557 | 470 | 1,067 | 426 |
| Allentown-Bethlehem-Easton [PA-NJ] | 1,541 | 398 | 314 | 175 |
| Stockton-Lodi [CA] | 1,476 | 497 | 393 | 165 |
| Tucson [AZ] | 1,172 | 418 | 369 | 274 |
| Baton Rouge [LA] | 1,168 | 374 | 355 | 234 |
| Akron [OH] | 1,116 | 340 | 590 | 301 |
| Grand Rapids-Wyoming [MI] | 1,096 | 458 | 628 | 396 |
| Vallejo-Fairfield [CA] | 991 | 406 | 361 | 203 |
| Fresno [CA] | 953 | 254 | 313 | 147 |
| Bakersfield [CA] | 887 | 318 | 307 | 128 |
| New Orleans-Metairie [LA] | 784 | 237 | 190 | 147 |
| Albuquerque [NM] | 769 | 323 | 259 | 193 |
| Lancaster [PA] | 764 | 473 | 543 | 451 |
| Atlantic City-Hammonton [NJ] | 761 | 337 | 273 | 154 |
| Urban Honolulu [HI] | 740 | 296 | 338 | 256 |
| Cape Coral-Fort Myers [FL] | 650 | 366 | 136 | 181 |
| Anchorage [AK] | 621 | 340 | 187 | 122 |
| Reno [NV] | 611 | 278 | 100 | 98 |
| Salinas [CA] | 607 | 245 | 158 | 86 |
| Portland-South Portland [ME] | 509 | 354 | 207 | 163 |
| Colorado Springs [CO] | 472 | 223 | (B) | - |
| New York-Newark-Jersey City [NY-NJ-PA] | 466 | 197 | 57 | 77 |
| Naples-Immokalee-Marco Island [FL] | 407 | 398 | 189 | 231 |
| Santa Maria-Santa Barbara [CA] | 399 | 151 | 72 | 68 |
| Deltona-Daytona Beach-Ormond Beach [FL] | 376 | 203 | 147 | 131 |
| Santa Rosa [CA] | 353 | 190 | 92 | 97 |
| Spokane-Spokane Valley [WA] | 192 | 118 | 80 | 86 |
| Modesto [CA] | 178 | 169 | 52 | 79 |
| Lafayette [LA] | 136 | 104 | 6 | 11 |
| Hilo [HI] | 25 | 35 | (B) | - |
| Kahului-Wailuku-Lahaina [HI] | 4 | 7 | (B) | - |