| Country | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| United States | 373,253 | 7,314 | 132,572 | 4,200 |
| State | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| New Jersey | 75,414 | 2,820 | 30,279 | 1,860 |
| California | 44,917 | 2,616 | 13,367 | 1,112 |
| Illinois | 41,596 | 2,556 | 17,563 | 1,509 |
| Texas | 30,317 | 2,452 | 9,748 | 1,159 |
| New York | 20,782 | 1,653 | 6,992 | 931 |
| Georgia | 19,656 | 1,993 | 6,352 | 876 |
| Florida | 19,530 | 2,024 | 5,574 | 865 |
| Pennsylvania | 19,292 | 1,661 | 8,236 | 854 |
| Maryland | 9,631 | 1,177 | 3,647 | 601 |
| North Carolina | 9,623 | 1,247 | 3,548 | 624 |
| Michigan | 9,355 | 1,002 | 2,905 | 444 |
| Massachusetts | 8,926 | 1,047 | 3,165 | 588 |
| Virginia | 8,670 | 1,042 | 2,826 | 527 |
| Ohio | 7,727 | 893 | 2,508 | 465 |
| Connecticut | 5,647 | 869 | 2,109 | 416 |
| Tennessee | 4,454 | 814 | 1,622 | 417 |
| South Carolina | 4,093 | 828 | 1,282 | 383 |
| Indiana | 4,007 | 646 | 1,343 | 341 |
| Arizona | 3,824 | 601 | 862 | 242 |
| Alabama | 2,630 | 623 | 674 | 307 |
| Washington | 2,552 | 571 | 488 | 210 |
| Delaware | 2,091 | 552 | 1,069 | 309 |
| Minnesota | 1,894 | 561 | 487 | 228 |
| Missouri | 1,813 | 485 | 570 | 228 |
| Mississippi | 1,566 | 409 | 490 | 194 |
| Wisconsin | 1,521 | 469 | 621 | 232 |
| Kentucky | 1,266 | 451 | 429 | 205 |
| New Hampshire | 1,138 | 405 | 544 | 292 |
| Louisiana | 1,079 | 332 | 353 | 166 |
| Nevada | 1,022 | 372 | 626 | 252 |
| Arkansas | 917 | 376 | 385 | 201 |
| Oklahoma | 834 | 302 | 249 | 126 |
| Colorado | 762 | 256 | 182 | 107 |
| Oregon | 621 | 337 | 179 | 156 |
| Kansas | 575 | 171 | 239 | 105 |
| Iowa | 532 | 238 | 169 | 109 |
| New Mexico | 488 | 245 | 165 | 93 |
| Rhode Island | 479 | 281 | 181 | 118 |
| Utah | 333 | 173 | 103 | 104 |
| District of Columbia | 311 | 151 | 26 | 29 |
| West Virginia | 297 | 149 | 82 | 69 |
| Nebraska | 275 | 136 | 130 | 83 |
| Vermont | 165 | 106 | 41 | 47 |
| Alaska | 123 | 177 | (B) | - |
| Maine | 123 | 155 | (B) | - |
| South Dakota | 100 | 100 | 73 | 95 |
| Idaho | 99 | 116 | (B) | - |
| North Dakota | 79 | 67 | 35 | 34 |
| Hawaii | 57 | 86 | 12 | 19 |
| Wyoming | 42 | 66 | 42 | 66 |
| Montana | 8 | 16 | (B) | - |
| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Middlesex County [NJ] | 26,601 | 1,925 | 11,461 | 1,116 |
| Cook County [IL] | 23,250 | 1,856 | 10,282 | 1,177 |
| DuPage County [IL] | 10,444 | 1,155 | 4,054 | 592 |
| Los Angeles County [CA] | 9,568 | 1,252 | 2,806 | 470 |
| Hudson County [NJ] | 9,012 | 1,223 | 4,042 | 739 |
| Orange County [CA] | 7,366 | 995 | 2,450 | 540 |
| Bergen County [NJ] | 7,052 | 1,104 | 2,334 | 456 |
| Harris County [TX] | 6,408 | 1,053 | 1,990 | 544 |
| Alameda County [CA] | 6,288 | 992 | 1,695 | 395 |
| Santa Clara County [CA] | 6,260 | 931 | 1,347 | 316 |
| Queens County [NY] | 5,821 | 858 | 2,672 | 486 |
| Fort Bend County [TX] | 5,720 | 1,158 | 1,858 | 489 |
| Morris County [NJ] | 5,562 | 780 | 1,965 | 368 |
| Middlesex County [MA] | 4,852 | 778 | 1,909 | 449 |
| Somerset County [NJ] | 4,644 | 813 | 1,273 | 427 |
| Passaic County [NJ] | 4,621 | 744 | 2,302 | 498 |
| Gwinnett County [GA] | 4,286 | 951 | 1,254 | 399 |
| Nassau County [NY] | 4,200 | 843 | 1,295 | 643 |
| Bucks County [PA] | 4,054 | 706 | 1,832 | 445 |
| Collin County [TX] | 3,564 | 835 | 1,217 | 556 |
| Dallas County [TX] | 3,540 | 668 | 942 | 301 |
| Montgomery County [PA] | 3,538 | 771 | 1,525 | 416 |
| Oakland County [MI] | 3,493 | 570 | 937 | 233 |
| Maricopa County [AZ] | 3,332 | 576 | 793 | 222 |
| Wake County [NC] | 3,087 | 797 | 1,085 | 368 |
| Wayne County [MI] | 3,086 | 592 | 1,027 | 261 |
| Montgomery County [MD] | 3,071 | 715 | 882 | 346 |
| Tarrant County [TX] | 2,928 | 601 | 929 | 292 |
| Hillsborough County [FL] | 2,833 | 572 | 625 | 259 |
| Atlantic County [NJ] | 2,790 | 663 | 1,538 | 389 |
| Monmouth County [NJ] | 2,728 | 709 | 999 | 349 |
| Philadelphia County [PA] | 2,721 | 754 | 1,045 | 373 |
| Cobb County [GA] | 2,497 | 736 | 603 | 291 |
| Mecklenburg County [NC] | 2,490 | 762 | 1,029 | 379 |
| Mercer County [NJ] | 2,435 | 583 | 807 | 279 |
| San Diego County [CA] | 2,330 | 676 | 771 | 321 |
| Essex County [NJ] | 2,316 | 556 | 740 | 251 |
| Orange County [FL] | 2,284 | 675 | 528 | 204 |
| Union County [NJ] | 2,230 | 547 | 750 | 241 |
| Hartford County [CT] | 2,105 | 549 | 772 | 278 |
| Riverside County [CA] | 2,045 | 792 | 735 | 314 |
| Will County [IL] | 2,038 | 640 | 995 | 506 |
| Burlington County [NJ] | 1,972 | 407 | 723 | 216 |
| San Bernardino County [CA] | 1,933 | 581 | 752 | 320 |
| Baltimore County [MD] | 1,932 | 508 | 995 | 345 |
| New Castle County [DE] | 1,855 | 543 | 860 | 276 |
| King County [WA] | 1,781 | 473 | 412 | 207 |
| Camden County [NJ] | 1,757 | 549 | 781 | 271 |
| Howard County [MD] | 1,732 | 517 | 590 | 266 |
| Franklin County [OH] | 1,709 | 455 | 583 | 212 |
| Fairfax County [VA] | 1,676 | 424 | 206 | 103 |
| New York County [NY] | 1,606 | 425 | 130 | 79 |
| Allegheny County [PA] | 1,552 | 538 | 829 | 416 |
| Suffolk County [NY] | 1,551 | 478 | 576 | 212 |
| Westchester County [NY] | 1,520 | 367 | 332 | 146 |
| Palm Beach County [FL] | 1,364 | 534 | 496 | 273 |
| Cuyahoga County [OH] | 1,363 | 350 | 300 | 134 |
| Fulton County [GA] | 1,351 | 413 | 147 | 90 |
| Travis County [TX] | 1,340 | 352 | 462 | 167 |
| New Haven County [CT] | 1,331 | 495 | 537 | 220 |
| San Francisco County [CA] | 1,263 | 510 | 282 | 220 |
| Miami-Dade County [FL] | 1,210 | 874 | 578 | 522 |
| Lake County [IL] | 1,159 | 333 | 259 | 112 |
| Kane County [IL] | 1,116 | 485 | 653 | 345 |
| Loudoun County [VA] | 1,105 | 406 | 263 | 166 |
| Marion County [IN] | 1,101 | 513 | 266 | 203 |
| DeKalb County [GA] | 1,072 | 415 | 476 | 220 |
| Pinellas County [FL] | 1,041 | 384 | 217 | 172 |
| Sacramento County [CA] | 1,011 | 396 | 281 | 179 |
| Contra Costa County [CA] | 1,007 | 379 | 106 | 67 |
| Macomb County [MI] | 999 | 329 | 566 | 212 |
| Hamilton County [OH] | 987 | 497 | 247 | 184 |
| Bexar County [TX] | 976 | 436 | 270 | 154 |
| Suffolk County [MA] | 963 | 339 | 256 | 213 |
| Kings County [NY] | 947 | 301 | 261 | 132 |
| St. Louis County [MO] | 933 | 328 | 397 | 199 |
| San Mateo County [CA] | 931 | 270 | 269 | 115 |
| Delaware County [PA] | 925 | 326 | 343 | 197 |
| Fairfield County [CT] | 919 | 306 | 228 | 111 |
| Hillsborough County [NH] | 854 | 384 | 477 | 288 |
| Broward County [FL] | 840 | 301 | 208 | 127 |
| Norfolk County [MA] | 790 | 271 | 117 | 60 |
| Hennepin County [MN] | 775 | 335 | 100 | 83 |
| Prince George s County [MD] | 766 | 230 | 301 | 99 |
| Chester County [PA] | 725 | 267 | 145 | 81 |
| Denton County [TX] | 707 | 289 | 166 | 179 |
| Henrico County [VA] | 673 | 249 | 300 | 158 |
| Clark County [NV] | 665 | 292 | 393 | 208 |
| Duval County [FL] | 663 | 348 | 199 | 130 |
| Kern County [CA] | 635 | 361 | 261 | 245 |
| Ventura County [CA] | 611 | 287 | 249 | 146 |
| San Joaquin County [CA] | 592 | 307 | 153 | 131 |
| Bronx County [NY] | 587 | 309 | 194 | 175 |
| Prince William County [VA] | 583 | 260 | 174 | 109 |
| Ocean County [NJ] | 578 | 292 | 267 | 152 |
| Davidson County [TN] | 575 | 343 | 112 | 83 |
| Washtenaw County [MI] | 562 | 241 | 47 | 34 |
| Albany County [NY] | 557 | 294 | 187 | 148 |
| Shelby County [TN] | 525 | 231 | 203 | 132 |
| Rockland County [NY] | 524 | 203 | 90 | 53 |
| Anne Arundel County [MD] | 521 | 247 | 173 | 128 |
| Virginia Beach city [VA] | 506 | 244 | 217 | 168 |
| Snohomish County [WA] | 494 | 338 | 51 | 68 |
| Essex County [MA] | 492 | 213 | 232 | 116 |
| Richmond County [NY] | 491 | 194 | 169 | 81 |
| Worcester County [MA] | 451 | 199 | 101 | 83 |
| Bristol County [MA] | 444 | 259 | 243 | 141 |
| Hampden County [MA] | 385 | 287 | 101 | 87 |
| Fresno County [CA] | 378 | 295 | 125 | 134 |
| Washington County [OR] | 376 | 272 | 155 | 153 |
| Providence County [RI] | 354 | 262 | 101 | 78 |
| Sonoma County [CA] | 347 | 231 | 126 | 102 |
| Milwaukee County [WI] | 320 | 144 | 110 | 86 |
| District of Columbia [DC] | 311 | 151 | 26 | 29 |
| Orange County [NY] | 307 | 242 | 81 | 67 |
| Lee County [FL] | 306 | 206 | 34 | 43 |
| Pima County [AZ] | 304 | 155 | 28 | 69 |
| Monroe County [NY] | 294 | 137 | 77 | 51 |
| Johnson County [KS] | 281 | 136 | 76 | 67 |
| Arlington County [VA] | 268 | 194 | 37 | 46 |
| Placer County [CA] | 259 | 183 | 92 | 81 |
| Guilford County [NC] | 255 | 134 | 104 | 88 |
| Yolo County [CA] | 247 | 189 | 40 | 43 |
| Bernalillo County [NM] | 245 | 176 | 79 | 75 |
| Onondaga County [NY] | 240 | 131 | 127 | 75 |
| Erie County [NY] | 235 | 117 | 71 | 60 |
| Dakota County [MN] | 234 | 204 | 30 | 41 |
| Denver County [CO] | 229 | 109 | 58 | 65 |
| Jefferson County [KY] | 219 | 153 | 71 | 69 |
| Baltimore city [MD] | 215 | 124 | 5 | 9 |
| Jefferson Parish [LA] | 210 | 135 | 83 | 53 |
| Stanislaus County [CA] | 196 | 112 | 147 | 95 |
| Salt Lake County [UT] | 192 | 144 | 73 | 101 |
| Santa Barbara County [CA] | 177 | 120 | 45 | 68 |
| Washoe County [NV] | 162 | 166 | 85 | 86 |
| Oklahoma County [OK] | 159 | 111 | 53 | 55 |
| Solano County [CA] | 153 | 142 | 66 | 74 |
| Lancaster County [PA] | 150 | 215 | 21 | 31 |
| Plymouth County [MA] | 147 | 140 | 65 | 83 |
| Anchorage Municipality [AK] | 123 | 177 | (B) | - |
| Ramsey County [MN] | 112 | 95 | 29 | 37 |
| El Paso County [CO] | 95 | 93 | (B) | - |
| Monterey County [CA] | 85 | 81 | 85 | 81 |
| Pierce County [WA] | 85 | 92 | 20 | 34 |
| Polk County [IA] | 77 | 94 | (B) | - |
| Multnomah County [OR] | 74 | 53 | (B) | - |
| Clark County [WA] | 58 | 60 | (B) | - |
| Arapahoe County [CO] | 51 | 50 | 10 | 17 |
| Collier County [FL] | 48 | 66 | (B) | - |
| Hawaii County [HI] | 45 | 84 | (B) | - |
| Dane County [WI] | 37 | 35 | (B) | - |
| San Juan County [NM] | 26 | 41 | (B) | - |
| Honolulu County [HI] | 12 | 19 | 12 | 19 |
| 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] | 83,930 | 2,985 | 32,337 | 2,080 |
| Chicago-Naperville-Elgin [IL-IN] | 39,590 | 2,478 | 16,803 | 1,450 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 17,874 | 1,716 | 7,310 | 837 |
| Los Angeles-Long Beach-Anaheim [CA] | 16,934 | 1,698 | 5,256 | 679 |
| Houston-The Woodlands-Sugar Land [TX] | 13,210 | 1,720 | 4,146 | 852 |
| Atlanta-Sandy Springs-Roswell [GA] | 13,084 | 1,530 | 3,746 | 656 |
| Dallas-Fort Worth-Arlington [TX] | 11,018 | 1,331 | 3,385 | 756 |
| San Francisco-Oakland-Hayward [CA] | 9,682 | 1,279 | 2,443 | 466 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 8,589 | 1,047 | 2,202 | 491 |
| Detroit-Warren-Dearborn [MI] | 7,633 | 870 | 2,539 | 420 |
| Boston-Cambridge-Newton [MA-NH] | 7,398 | 914 | 2,642 | 531 |
| San Jose-Sunnyvale-Santa Clara [CA] | 6,260 | 931 | 1,347 | 316 |
| Baltimore-Columbia-Towson [MD] | 4,879 | 814 | 1,992 | 463 |
| Tampa-St. Petersburg-Clearwater [FL] | 4,595 | 743 | 1,003 | 316 |
| Charlotte-Concord-Gastonia [NC-SC] | 4,372 | 967 | 1,501 | 449 |
| Orlando-Kissimmee-Sanford [FL] | 4,059 | 961 | 892 | 295 |
| Riverside-San Bernardino-Ontario [CA] | 3,978 | 987 | 1,487 | 471 |
| Phoenix-Mesa-Scottsdale [AZ] | 3,438 | 592 | 804 | 223 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 3,414 | 1,027 | 1,282 | 585 |
| Raleigh [NC] | 3,212 | 779 | 1,137 | 373 |
| Atlantic City-Hammonton [NJ] | 2,790 | 663 | 1,538 | 389 |
| Hartford-West Hartford-East Hartford [CT] | 2,672 | 579 | 982 | 299 |
| Trenton [NJ] | 2,435 | 583 | 807 | 279 |
| Seattle-Tacoma-Bellevue [WA] | 2,360 | 544 | 483 | 210 |
| Austin-Round Rock [TX] | 2,349 | 552 | 907 | 299 |
| San Diego-Carlsbad [CA] | 2,330 | 676 | 771 | 321 |
| Columbus [OH] | 2,242 | 504 | 817 | 233 |
| Indianapolis-Carmel-Anderson [IN] | 2,097 | 623 | 571 | 265 |
| Cincinnati [OH-KY-IN] | 1,846 | 604 | 529 | 259 |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 1,834 | 542 | 581 | 245 |
| Pittsburgh [PA] | 1,735 | 549 | 893 | 418 |
| Cleveland-Elyria [OH] | 1,696 | 413 | 477 | 182 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 1,627 | 525 | 414 | 216 |
| Sacramento-Roseville-Arden-Arcade [CA] | 1,572 | 460 | 413 | 212 |
| St. Louis [MO-IL] | 1,552 | 455 | 534 | 228 |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 1,511 | 397 | 654 | 239 |
| Jacksonville [FL] | 1,394 | 469 | 401 | 181 |
| New Haven-Milford [CT] | 1,331 | 495 | 537 | 220 |
| Harrisburg-Carlisle [PA] | 1,302 | 413 | 301 | 125 |
| Allentown-Bethlehem-Easton [PA-NJ] | 1,261 | 389 | 401 | 151 |
| Richmond [VA] | 1,221 | 338 | 518 | 212 |
| San Antonio-New Braunfels [TX] | 1,042 | 438 | 296 | 160 |
| New York-Newark-Jersey City [NY-NJ-PA] | 1,039 | 481 | 365 | 207 |
| Providence-Warwick [RI-MA] | 923 | 340 | 424 | 162 |
| Bridgeport-Stamford-Norwalk [CT] | 919 | 306 | 228 | 111 |
| Manchester-Nashua [NH] | 854 | 384 | 477 | 288 |
| Memphis [TN-MS-AR] | 806 | 274 | 274 | 146 |
| Albany-Schenectady-Troy [NY] | 752 | 302 | 199 | 148 |
| Las Vegas-Henderson-Paradise [NV] | 665 | 292 | 393 | 208 |
| Bakersfield [CA] | 635 | 361 | 261 | 245 |
| Oxnard-Thousand Oaks-Ventura [CA] | 611 | 287 | 249 | 146 |
| Denver-Aurora-Lakewood [CO] | 605 | 223 | 139 | 90 |
| Milwaukee-Waukesha-West Allis [WI] | 603 | 222 | 251 | 118 |
| Stockton-Lodi [CA] | 592 | 307 | 153 | 131 |
| Portland-Vancouver-Hillsboro [OR-WA] | 569 | 320 | 160 | 153 |
| Ann Arbor [MI] | 562 | 241 | 47 | 34 |
| Dayton [OH] | 543 | 313 | 185 | 145 |
| Springfield [MA] | 511 | 307 | 180 | 125 |
| New Orleans-Metairie [LA] | 503 | 235 | 132 | 87 |
| Kansas City [MO-KS] | 488 | 203 | 91 | 69 |
| Worcester [MA-CT] | 482 | 201 | 101 | 83 |
| Deltona-Daytona Beach-Ormond Beach [FL] | 408 | 206 | 123 | 124 |
| Baton Rouge [LA] | 401 | 254 | 192 | 144 |
| Akron [OH] | 394 | 160 | 168 | 90 |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 391 | 199 | 173 | 124 |
| Fresno [CA] | 378 | 295 | 125 | 134 |
| Oklahoma City [OK] | 370 | 185 | 121 | 93 |
| Durham-Chapel Hill [NC] | 351 | 132 | 136 | 101 |
| Louisville Jefferson County [KY] | 347 | 201 | 99 | 82 |
| Santa Rosa [CA] | 347 | 231 | 126 | 102 |
| Albuquerque [NM] | 325 | 195 | 122 | 84 |
| Rochester [NY] | 311 | 136 | 77 | 51 |
| Cape Coral-Fort Myers [FL] | 306 | 206 | 34 | 43 |
| Tucson [AZ] | 304 | 155 | 28 | 69 |
| Greensboro-High Point [NC] | 285 | 151 | 104 | 88 |
| Tulsa [OK] | 262 | 146 | 84 | 55 |
| Syracuse [NY] | 244 | 130 | 127 | 75 |
| Omaha-Council Bluffs [NE-IA] | 232 | 141 | 66 | 69 |
| Modesto [CA] | 196 | 112 | 147 | 95 |
| Salt Lake City [UT] | 192 | 144 | 73 | 101 |
| Lansing-East Lansing [MI] | 187 | 116 | 43 | 51 |
| Santa Maria-Santa Barbara [CA] | 177 | 120 | 45 | 68 |
| Reno [NV] | 162 | 166 | 85 | 86 |
| Vallejo-Fairfield [CA] | 153 | 142 | 66 | 74 |
| Lancaster [PA] | 150 | 215 | 21 | 31 |
| Anchorage [AK] | 123 | 177 | (B) | - |
| Portland-South Portland [ME] | 123 | 155 | (B) | - |
| Grand Rapids-Wyoming [MI] | 122 | 84 | 50 | 44 |
| Colorado Springs [CO] | 95 | 93 | (B) | - |
| Des Moines-West Des Moines [IA] | 85 | 95 | 4 | 7 |
| Salinas [CA] | 85 | 81 | 85 | 81 |
| Naples-Immokalee-Marco Island [FL] | 48 | 66 | (B) | - |
| Hilo [HI] | 45 | 84 | (B) | - |
| Madison [WI] | 37 | 35 | (B) | - |
| Farmington [NM] | 26 | 41 | (B) | - |
| Urban Honolulu [HI] | 12 | 19 | 12 | 19 |
| Lafayette [LA] | 9 | 15 | (B) | - |