| Country | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| United States | 693,469 | 9,721 | 269,805 | 5,692 |
| State | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Massachusetts | 181,917 | 4,738 | 84,755 | 2,951 |
| Florida | 87,311 | 3,268 | 33,328 | 1,966 |
| New Jersey | 84,180 | 3,040 | 39,213 | 1,946 |
| California | 79,572 | 3,175 | 25,343 | 1,541 |
| New York | 45,070 | 2,161 | 16,785 | 1,403 |
| Connecticut | 37,016 | 2,153 | 16,954 | 1,327 |
| Rhode Island | 32,159 | 1,653 | 13,063 | 877 |
| Texas | 19,762 | 1,476 | 4,929 | 753 |
| Pennsylvania | 12,504 | 1,434 | 5,075 | 887 |
| Georgia | 12,148 | 1,551 | 3,931 | 904 |
| Maryland | 10,971 | 1,073 | 3,787 | 552 |
| Virginia | 8,439 | 836 | 2,205 | 429 |
| Utah | 7,151 | 748 | 1,213 | 230 |
| Illinois | 6,699 | 851 | 1,341 | 244 |
| North Carolina | 6,189 | 793 | 1,821 | 489 |
| Washington | 5,289 | 779 | 1,264 | 407 |
| Arizona | 4,401 | 725 | 982 | 260 |
| Michigan | 4,031 | 522 | 988 | 258 |
| Ohio | 3,459 | 634 | 953 | 341 |
| South Carolina | 3,456 | 758 | 1,479 | 509 |
| Colorado | 3,370 | 566 | 695 | 250 |
| New Hampshire | 3,347 | 655 | 1,366 | 483 |
| Louisiana | 3,117 | 750 | 1,170 | 440 |
| Nevada | 2,786 | 429 | 708 | 159 |
| Missouri | 2,653 | 612 | 743 | 303 |
| Minnesota | 2,414 | 385 | 331 | 112 |
| Tennessee | 2,317 | 443 | 661 | 269 |
| Oregon | 2,007 | 417 | 475 | 162 |
| Hawaii | 1,915 | 414 | 322 | 124 |
| Indiana | 1,878 | 472 | 512 | 222 |
| Idaho | 1,563 | 378 | 166 | 89 |
| District of Columbia | 1,449 | 365 | 407 | 152 |
| Alabama | 1,374 | 337 | 421 | 193 |
| Wisconsin | 1,347 | 307 | 241 | 91 |
| Kansas | 1,342 | 336 | 409 | 199 |
| Arkansas | 1,050 | 360 | 262 | 166 |
| Oklahoma | 962 | 225 | 288 | 111 |
| Nebraska | 792 | 226 | 113 | 56 |
| Kentucky | 771 | 233 | 115 | 75 |
| New Mexico | 753 | 226 | 103 | 79 |
| Delaware | 696 | 238 | 210 | 110 |
| Maine | 673 | 194 | 107 | 67 |
| Iowa | 668 | 183 | 120 | 61 |
| Wyoming | 507 | 272 | 2 | 4 |
| Puerto Rico | 506 | 158 | 225 | 104 |
| Mississippi | 472 | 197 | 82 | 57 |
| West Virginia | 389 | 133 | 61 | 43 |
| Vermont | 342 | 107 | 118 | 87 |
| Alaska | 279 | 124 | 93 | 70 |
| South Dakota | 219 | 87 | 28 | 24 |
| North Dakota | 158 | 88 | 29 | 22 |
| Montana | 135 | 64 | 38 | 31 |
| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Bristol County [MA] | 62,323 | 2,781 | 25,401 | 1,344 |
| Middlesex County [MA] | 48,700 | 2,269 | 24,402 | 1,382 |
| Providence County [RI] | 24,163 | 1,451 | 10,232 | 830 |
| Broward County [FL] | 24,048 | 2,110 | 10,143 | 1,168 |
| Essex County [NJ] | 23,528 | 1,425 | 13,711 | 911 |
| Union County [NJ] | 19,655 | 1,407 | 8,783 | 837 |
| Fairfield County [CT] | 18,997 | 1,445 | 9,677 | 971 |
| Plymouth County [MA] | 17,610 | 1,539 | 9,364 | 1,068 |
| Miami-Dade County [FL] | 14,734 | 1,509 | 4,259 | 733 |
| Suffolk County [MA] | 12,106 | 1,392 | 6,143 | 795 |
| Los Angeles County [CA] | 11,555 | 984 | 3,093 | 460 |
| Orange County [FL] | 11,130 | 1,607 | 4,585 | 889 |
| Palm Beach County [FL] | 10,612 | 1,083 | 4,729 | 670 |
| Worcester County [MA] | 10,577 | 987 | 5,218 | 780 |
| Westchester County [NY] | 10,459 | 1,136 | 4,845 | 798 |
| Hudson County [NJ] | 10,004 | 920 | 3,779 | 533 |
| Essex County [MA] | 9,704 | 1,023 | 4,090 | 614 |
| Norfolk County [MA] | 8,968 | 1,162 | 4,378 | 878 |
| Queens County [NY] | 8,117 | 873 | 3,110 | 557 |
| New Haven County [CT] | 8,039 | 996 | 3,316 | 556 |
| Santa Clara County [CA] | 8,029 | 1,031 | 3,003 | 574 |
| Middlesex County [NJ] | 6,913 | 1,041 | 2,460 | 452 |
| New York County [NY] | 6,869 | 864 | 1,545 | 413 |
| Hartford County [CT] | 6,386 | 779 | 2,808 | 427 |
| Alameda County [CA] | 6,308 | 957 | 1,715 | 349 |
| Monmouth County [NJ] | 6,027 | 818 | 3,341 | 615 |
| Montgomery County [MD] | 5,769 | 711 | 2,125 | 411 |
| Nassau County [NY] | 5,421 | 758 | 2,388 | 380 |
| Suffolk County [NY] | 5,362 | 1,121 | 2,176 | 624 |
| Bergen County [NJ] | 5,359 | 970 | 2,072 | 493 |
| Hampden County [MA] | 5,341 | 718 | 2,743 | 438 |
| San Diego County [CA] | 5,280 | 773 | 1,391 | 407 |
| Philadelphia County [PA] | 5,034 | 1,119 | 2,716 | 766 |
| Harris County [TX] | 4,698 | 749 | 1,428 | 387 |
| Stanislaus County [CA] | 4,448 | 689 | 1,595 | 338 |
| Cobb County [GA] | 4,337 | 981 | 1,659 | 539 |
| Contra Costa County [CA] | 3,964 | 795 | 1,745 | 500 |
| Orange County [CA] | 3,804 | 661 | 757 | 208 |
| Cook County [IL] | 3,182 | 515 | 717 | 176 |
| Fulton County [GA] | 2,905 | 757 | 1,177 | 502 |
| King County [WA] | 2,905 | 583 | 807 | 386 |
| Hillsborough County [FL] | 2,866 | 620 | 1,069 | 351 |
| Maricopa County [AZ] | 2,826 | 563 | 640 | 222 |
| San Joaquin County [CA] | 2,785 | 632 | 1,124 | 292 |
| Sacramento County [CA] | 2,673 | 576 | 824 | 261 |
| Lee County [FL] | 2,623 | 570 | 1,130 | 344 |
| Burlington County [NJ] | 2,605 | 738 | 1,573 | 512 |
| Salt Lake County [UT] | 2,407 | 494 | 419 | 134 |
| Pinellas County [FL] | 2,402 | 558 | 657 | 235 |
| San Mateo County [CA] | 2,299 | 662 | 885 | 323 |
| Fairfax County [VA] | 2,297 | 540 | 601 | 286 |
| Clark County [NV] | 2,221 | 400 | 531 | 132 |
| San Bernardino County [CA] | 2,209 | 532 | 774 | 231 |
| Kings County [NY] | 2,202 | 317 | 578 | 166 |
| Ocean County [NJ] | 2,185 | 512 | 872 | 335 |
| Dallas County [TX] | 2,110 | 535 | 598 | 270 |
| Hillsborough County [NH] | 2,078 | 556 | 1,048 | 423 |
| Tarrant County [TX] | 1,957 | 452 | 238 | 152 |
| Mecklenburg County [NC] | 1,887 | 556 | 816 | 402 |
| Duval County [FL] | 1,792 | 472 | 766 | 363 |
| San Francisco County [CA] | 1,704 | 437 | 481 | 178 |
| Fort Bend County [TX] | 1,693 | 544 | 381 | 195 |
| Riverside County [CA] | 1,646 | 377 | 470 | 207 |
| Somerset County [NJ] | 1,583 | 433 | 543 | 211 |
| Collin County [TX] | 1,508 | 450 | 549 | 223 |
| District of Columbia [DC] | 1,449 | 365 | 407 | 152 |
| Morris County [NJ] | 1,303 | 370 | 374 | 174 |
| Sonoma County [CA] | 1,300 | 379 | 528 | 236 |
| Travis County [TX] | 1,273 | 316 | 210 | 116 |
| Honolulu County [HI] | 1,260 | 365 | 192 | 97 |
| Fresno County [CA] | 1,149 | 282 | 271 | 106 |
| Franklin County [OH] | 1,103 | 436 | 331 | 226 |
| Oakland County [MI] | 1,088 | 310 | 304 | 127 |
| Solano County [CA] | 1,087 | 343 | 166 | 96 |
| Hennepin County [MN] | 1,066 | 287 | 96 | 60 |
| Bexar County [TX] | 1,063 | 396 | 208 | 178 |
| Wake County [NC] | 1,052 | 289 | 257 | 162 |
| Denton County [TX] | 1,032 | 344 | 302 | 150 |
| Anne Arundel County [MD] | 1,012 | 550 | 290 | 191 |
| DeKalb County [GA] | 954 | 229 | 105 | 77 |
| DuPage County [IL] | 928 | 262 | 198 | 107 |
| Allegheny County [PA] | 886 | 251 | 176 | 110 |
| Montgomery County [PA] | 869 | 213 | 293 | 107 |
| Camden County [NJ] | 867 | 312 | 276 | 141 |
| Passaic County [NJ] | 849 | 418 | 274 | 210 |
| Jefferson Parish [LA] | 838 | 462 | 527 | 346 |
| Prince George s County [MD] | 823 | 206 | 308 | 135 |
| Santa Barbara County [CA] | 793 | 246 | 93 | 67 |
| Snohomish County [WA] | 788 | 289 | 177 | 105 |
| Washtenaw County [MI] | 769 | 298 | 189 | 109 |
| Placer County [CA] | 754 | 253 | 273 | 141 |
| Pima County [AZ] | 751 | 276 | 183 | 78 |
| Loudoun County [VA] | 744 | 283 | 106 | 97 |
| Prince William County [VA] | 743 | 313 | 194 | 128 |
| Yolo County [CA] | 731 | 334 | 128 | 97 |
| Monterey County [CA] | 726 | 326 | 231 | 114 |
| Ventura County [CA] | 699 | 252 | 127 | 79 |
| Howard County [MD] | 698 | 321 | 177 | 121 |
| Henrico County [VA] | 660 | 293 | 312 | 160 |
| Rockland County [NY] | 647 | 344 | 324 | 217 |
| Bucks County [PA] | 639 | 218 | 196 | 86 |
| New Castle County [DE] | 629 | 224 | 187 | 107 |
| St. Louis County [MO] | 622 | 256 | 133 | 84 |
| Johnson County [KS] | 612 | 209 | 118 | 92 |
| Erie County [NY] | 597 | 268 | 62 | 52 |
| Collier County [FL] | 590 | 239 | 136 | 85 |
| Gwinnett County [GA] | 589 | 229 | 177 | 106 |
| Bronx County [NY] | 575 | 216 | 237 | 124 |
| Baltimore County [MD] | 549 | 166 | 139 | 80 |
| Wayne County [MI] | 540 | 172 | 80 | 54 |
| Multnomah County [OR] | 516 | 197 | 131 | 109 |
| Arlington County [VA] | 499 | 169 | 90 | 51 |
| Mercer County [NJ] | 497 | 213 | 158 | 81 |
| Washington County [OR] | 495 | 209 | 82 | 61 |
| Cuyahoga County [OH] | 491 | 195 | 75 | 62 |
| Shelby County [TN] | 486 | 209 | 128 | 71 |
| Chester County [PA] | 480 | 208 | 227 | 154 |
| Orange County [NY] | 436 | 201 | 139 | 102 |
| Pierce County [WA] | 428 | 202 | 84 | 65 |
| Monroe County [NY] | 424 | 177 | 139 | 117 |
| Dane County [WI] | 415 | 200 | 83 | 61 |
| Arapahoe County [CO] | 409 | 160 | 73 | 48 |
| Maui County [HI] | 379 | 152 | 65 | 51 |
| Washoe County [NV] | 369 | 150 | 150 | 115 |
| Baltimore city [MD] | 357 | 137 | 76 | 57 |
| El Paso County [CO] | 349 | 131 | 60 | 45 |
| Denver County [CO] | 348 | 203 | 45 | 37 |
| Delaware County [PA] | 346 | 132 | 67 | 44 |
| Davidson County [TN] | 327 | 187 | 130 | 162 |
| Virginia Beach city [VA] | 323 | 147 | 57 | 41 |
| Kane County [IL] | 314 | 147 | 83 | 56 |
| Guilford County [NC] | 306 | 206 | 11 | 18 |
| Milwaukee County [WI] | 296 | 115 | 58 | 48 |
| Bernalillo County [NM] | 280 | 133 | 21 | 22 |
| Onondaga County [NY] | 280 | 232 | 61 | 48 |
| Will County [IL] | 276 | 141 | 80 | 73 |
| Lake County [IL] | 274 | 149 | 35 | 33 |
| Ramsey County [MN] | 261 | 104 | (B) | - |
| Hawaii County [HI] | 250 | 136 | 65 | 56 |
| Albany County [NY] | 250 | 172 | 60 | 95 |
| Hamilton County [OH] | 245 | 159 | 51 | 54 |
| Clark County [WA] | 227 | 161 | 17 | 29 |
| Richmond County [NY] | 225 | 132 | 93 | 66 |
| Marion County [IN] | 216 | 93 | 53 | 44 |
| Atlantic County [NJ] | 215 | 132 | 96 | 76 |
| Jefferson County [KY] | 210 | 91 | 33 | 36 |
| Kern County [CA] | 188 | 94 | 36 | 31 |
| Anchorage Municipality [AK] | 174 | 119 | 73 | 68 |
| Dakota County [MN] | 171 | 94 | 55 | 62 |
| Oklahoma County [OK] | 143 | 66 | 42 | 52 |
| Macomb County [MI] | 130 | 94 | 59 | 60 |
| Lancaster County [PA] | 68 | 57 | (B) | - |
| Polk County [IA] | 55 | 36 | 23 | 30 |
| Navajo County [AZ] | 43 | 62 | (B) | - |
| San Juan County [NM] | 35 | 37 | (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] | 120,022 | 3,770 | 52,430 | 2,384 |
| Boston-Cambridge-Newton [MA-NH] | 97,969 | 3,613 | 48,622 | 2,391 |
| Providence-Warwick [RI-MA] | 94,482 | 3,335 | 38,464 | 1,634 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 49,394 | 2,685 | 19,131 | 1,560 |
| Bridgeport-Stamford-Norwalk [CT] | 18,997 | 1,445 | 9,677 | 971 |
| Los Angeles-Long Beach-Anaheim [CA] | 15,359 | 1,218 | 3,850 | 544 |
| San Francisco-Oakland-Hayward [CA] | 15,242 | 1,574 | 5,186 | 784 |
| Orlando-Kissimmee-Sanford [FL] | 14,140 | 1,765 | 5,647 | 1,004 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 14,014 | 1,286 | 4,324 | 567 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 12,494 | 1,594 | 5,983 | 1,040 |
| Worcester [MA-CT] | 10,851 | 973 | 5,264 | 789 |
| Atlanta-Sandy Springs-Roswell [GA] | 10,514 | 1,475 | 3,602 | 887 |
| San Jose-Sunnyvale-Santa Clara [CA] | 8,177 | 1,046 | 3,105 | 583 |
| New Haven-Milford [CT] | 8,039 | 996 | 3,316 | 556 |
| Hartford-West Hartford-East Hartford [CT] | 7,701 | 809 | 3,270 | 479 |
| Houston-The Woodlands-Sugar Land [TX] | 7,527 | 944 | 2,025 | 428 |
| Dallas-Fort Worth-Arlington [TX] | 6,932 | 916 | 1,771 | 424 |
| Tampa-St. Petersburg-Clearwater [FL] | 6,784 | 954 | 2,176 | 439 |
| Springfield [MA] | 5,818 | 723 | 2,799 | 431 |
| Chicago-Naperville-Elgin [IL-IN] | 5,373 | 779 | 1,133 | 236 |
| San Diego-Carlsbad [CA] | 5,280 | 773 | 1,391 | 407 |
| Modesto [CA] | 4,448 | 689 | 1,595 | 338 |
| Sacramento-Roseville-Arden-Arcade [CA] | 4,210 | 681 | 1,245 | 287 |
| Seattle-Tacoma-Bellevue [WA] | 4,121 | 698 | 1,068 | 395 |
| Riverside-San Bernardino-Ontario [CA] | 3,855 | 652 | 1,244 | 304 |
| Phoenix-Mesa-Scottsdale [AZ] | 3,087 | 587 | 658 | 220 |
| Baltimore-Columbia-Towson [MD] | 2,836 | 647 | 773 | 262 |
| Charlotte-Concord-Gastonia [NC-SC] | 2,795 | 665 | 952 | 419 |
| Stockton-Lodi [CA] | 2,785 | 632 | 1,124 | 292 |
| Cape Coral-Fort Myers [FL] | 2,623 | 570 | 1,130 | 344 |
| Salt Lake City [UT] | 2,527 | 486 | 430 | 140 |
| Deltona-Daytona Beach-Ormond Beach [FL] | 2,486 | 618 | 1,073 | 338 |
| Jacksonville [FL] | 2,387 | 550 | 973 | 377 |
| Las Vegas-Henderson-Paradise [NV] | 2,221 | 400 | 531 | 132 |
| Austin-Round Rock [TX] | 2,083 | 433 | 482 | 191 |
| Manchester-Nashua [NH] | 2,078 | 556 | 1,048 | 423 |
| Allentown-Bethlehem-Easton [PA-NJ] | 1,979 | 402 | 674 | 212 |
| New Orleans-Metairie [LA] | 1,909 | 548 | 913 | 408 |
| Detroit-Warren-Dearborn [MI] | 1,875 | 358 | 466 | 166 |
| Denver-Aurora-Lakewood [CO] | 1,824 | 423 | 367 | 161 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 1,754 | 320 | 202 | 86 |
| Richmond [VA] | 1,406 | 399 | 494 | 194 |
| Portland-Vancouver-Hillsboro [OR-WA] | 1,340 | 337 | 256 | 132 |
| Kansas City [MO-KS] | 1,335 | 398 | 294 | 141 |
| Columbus [OH] | 1,300 | 447 | 380 | 230 |
| Santa Rosa [CA] | 1,300 | 379 | 528 | 236 |
| New York-Newark-Jersey City [NY-NJ-PA] | 1,275 | 467 | 568 | 258 |
| Urban Honolulu [HI] | 1,260 | 365 | 192 | 97 |
| San Antonio-New Braunfels [TX] | 1,152 | 397 | 208 | 178 |
| Fresno [CA] | 1,149 | 282 | 271 | 106 |
| Raleigh [NC] | 1,133 | 295 | 338 | 196 |
| St. Louis [MO-IL] | 1,113 | 311 | 255 | 99 |
| Pittsburgh [PA] | 1,089 | 292 | 191 | 122 |
| Vallejo-Fairfield [CA] | 1,087 | 343 | 166 | 96 |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 835 | 215 | 157 | 90 |
| Indianapolis-Carmel-Anderson [IN] | 820 | 364 | 300 | 191 |
| Santa Maria-Santa Barbara [CA] | 793 | 246 | 93 | 67 |
| Ann Arbor [MI] | 769 | 298 | 189 | 109 |
| Tucson [AZ] | 751 | 276 | 183 | 78 |
| Salinas [CA] | 726 | 326 | 231 | 114 |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 722 | 314 | 112 | 71 |
| Oxnard-Thousand Oaks-Ventura [CA] | 699 | 252 | 127 | 79 |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 647 | 250 | 223 | 181 |
| Cleveland-Elyria [OH] | 639 | 259 | 126 | 99 |
| Baton Rouge [LA] | 610 | 309 | 69 | 51 |
| Albany-Schenectady-Troy [NY] | 608 | 252 | 181 | 131 |
| Naples-Immokalee-Marco Island [FL] | 590 | 239 | 136 | 85 |
| Durham-Chapel Hill [NC] | 527 | 254 | 134 | 95 |
| Rochester [NY] | 523 | 179 | 176 | 118 |
| Memphis [TN-MS-AR] | 520 | 206 | 128 | 71 |
| Trenton [NJ] | 497 | 213 | 158 | 81 |
| Cincinnati [OH-KY-IN] | 482 | 204 | 98 | 67 |
| Omaha-Council Bluffs [NE-IA] | 459 | 150 | 100 | 55 |
| Madison [WI] | 443 | 197 | 96 | 56 |
| Tulsa [OK] | 402 | 138 | 135 | 71 |
| Milwaukee-Waukesha-West Allis [WI] | 400 | 122 | 98 | 58 |
| Harrisburg-Carlisle [PA] | 392 | 191 | 72 | 52 |
| Reno [NV] | 380 | 151 | 150 | 115 |
| Kahului-Wailuku-Lahaina [HI] | 379 | 152 | 65 | 51 |
| Lafayette [LA] | 352 | 263 | 127 | 151 |
| Albuquerque [NM] | 351 | 148 | 21 | 22 |
| Colorado Springs [CO] | 349 | 131 | 60 | 45 |
| Portland-South Portland [ME] | 349 | 141 | 35 | 27 |
| Greensboro-High Point [NC] | 336 | 213 | 28 | 33 |
| Syracuse [NY] | 297 | 227 | 68 | 50 |
| Oklahoma City [OK] | 261 | 102 | 77 | 58 |
| Hilo [HI] | 250 | 136 | 65 | 56 |
| Grand Rapids-Wyoming [MI] | 234 | 113 | 33 | 27 |
| Louisville Jefferson County [KY] | 234 | 93 | 33 | 36 |
| Atlantic City-Hammonton [NJ] | 215 | 132 | 96 | 76 |
| Anchorage [AK] | 212 | 118 | 82 | 68 |
| Bakersfield [CA] | 188 | 94 | 36 | 31 |
| Spokane-Spokane Valley [WA] | 154 | 70 | 19 | 23 |
| Dayton [OH] | 138 | 79 | 39 | 54 |
| Akron [OH] | 79 | 56 | 23 | 26 |
| Lansing-East Lansing [MI] | 76 | 64 | 10 | 17 |
| Lancaster [PA] | 68 | 57 | (B) | - |
| Des Moines-West Des Moines [IA] | 58 | 36 | 23 | 30 |
| Show Low [AZ] | 43 | 62 | (B) | - |
| Farmington [NM] | 35 | 37 | (B) | - |