| Country | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| United States | 316,501 | 6,944 | 120,594 | 3,743 |
| State | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| New York | 36,471 | 1,833 | 15,971 | 1,094 |
| California | 33,935 | 2,071 | 14,314 | 1,283 |
| Illinois | 33,507 | 2,287 | 14,965 | 1,349 |
| Washington | 26,622 | 2,342 | 13,711 | 1,406 |
| New Jersey | 21,382 | 1,397 | 8,390 | 884 |
| Pennsylvania | 19,189 | 1,287 | 6,752 | 802 |
| Florida | 16,520 | 1,285 | 5,841 | 835 |
| Ohio | 15,688 | 1,302 | 5,603 | 594 |
| Michigan | 13,432 | 1,054 | 4,920 | 471 |
| Texas | 11,300 | 1,114 | 2,313 | 398 |
| Oregon | 7,444 | 1,453 | 3,444 | 689 |
| Massachusetts | 6,969 | 902 | 2,146 | 447 |
| Maryland | 5,420 | 697 | 1,398 | 351 |
| Virginia | 5,407 | 724 | 1,343 | 383 |
| Indiana | 5,154 | 878 | 1,709 | 426 |
| North Carolina | 4,861 | 838 | 1,372 | 352 |
| Connecticut | 4,812 | 651 | 1,552 | 392 |
| Georgia | 4,378 | 675 | 1,511 | 336 |
| Arizona | 4,146 | 624 | 1,036 | 291 |
| Colorado | 4,101 | 733 | 1,223 | 354 |
| Minnesota | 4,074 | 515 | 1,164 | 248 |
| Wisconsin | 3,240 | 422 | 959 | 229 |
| South Carolina | 3,123 | 822 | 1,338 | 462 |
| Nevada | 2,970 | 554 | 1,164 | 332 |
| Nebraska | 2,523 | 384 | 502 | 193 |
| Missouri | 2,387 | 553 | 647 | 248 |
| Tennessee | 1,737 | 487 | 595 | 239 |
| Kentucky | 1,701 | 424 | 639 | 230 |
| Iowa | 1,388 | 262 | 503 | 154 |
| Utah | 1,272 | 405 | 308 | 154 |
| South Dakota | 1,002 | 337 | 317 | 218 |
| Alaska | 921 | 542 | 592 | 498 |
| Idaho | 783 | 375 | 278 | 213 |
| North Dakota | 757 | 196 | 195 | 144 |
| Kansas | 729 | 206 | 183 | 139 |
| District of Columbia | 674 | 194 | 91 | 50 |
| Hawaii | 623 | 251 | 85 | 71 |
| Delaware | 622 | 229 | 246 | 115 |
| Oklahoma | 581 | 216 | 78 | 104 |
| Arkansas | 570 | 356 | 161 | 190 |
| Alabama | 556 | 196 | 126 | 88 |
| Rhode Island | 489 | 178 | 135 | 97 |
| New Hampshire | 485 | 194 | 206 | 122 |
| Maine | 441 | 172 | 116 | 83 |
| Louisiana | 432 | 143 | 78 | 64 |
| New Mexico | 431 | 208 | 138 | 136 |
| Montana | 314 | 121 | 110 | 76 |
| West Virginia | 294 | 145 | 36 | 29 |
| Mississippi | 283 | 139 | 41 | 34 |
| Wyoming | 202 | 117 | 20 | 20 |
| Vermont | 159 | 78 | 29 | 20 |
| Puerto Rico | 63 | 60 | 42 | 50 |
| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Cook County [IL] | 22,336 | 1,679 | 10,868 | 1,053 |
| King County [WA] | 11,056 | 1,441 | 5,326 | 885 |
| Sacramento County [CA] | 10,866 | 1,488 | 6,735 | 1,015 |
| Cuyahoga County [OH] | 7,314 | 901 | 3,358 | 533 |
| Kings County [NY] | 6,219 | 864 | 3,936 | 525 |
| Los Angeles County [CA] | 6,025 | 826 | 2,088 | 476 |
| Snohomish County [WA] | 5,544 | 1,037 | 3,110 | 634 |
| Macomb County [MI] | 5,372 | 874 | 2,108 | 412 |
| DuPage County [IL] | 4,743 | 725 | 1,835 | 370 |
| Philadelphia County [PA] | 4,683 | 1,039 | 2,338 | 614 |
| Queens County [NY] | 4,666 | 550 | 2,021 | 332 |
| Multnomah County [OR] | 4,386 | 1,135 | 2,249 | 569 |
| Bergen County [NJ] | 3,879 | 799 | 1,617 | 467 |
| Clark County [WA] | 3,586 | 749 | 2,102 | 488 |
| New York County [NY] | 3,331 | 606 | 571 | 246 |
| Monroe County [NY] | 3,171 | 590 | 1,446 | 335 |
| Maricopa County [AZ] | 3,165 | 575 | 854 | 261 |
| Wayne County [MI] | 2,791 | 507 | 1,148 | 304 |
| Clark County [NV] | 2,656 | 544 | 1,117 | 331 |
| Oakland County [MI] | 2,643 | 499 | 959 | 239 |
| San Diego County [CA] | 2,616 | 478 | 887 | 298 |
| Pinellas County [FL] | 2,486 | 478 | 940 | 314 |
| Pierce County [WA] | 2,454 | 712 | 1,135 | 337 |
| Onondaga County [NY] | 2,342 | 511 | 979 | 248 |
| Passaic County [NJ] | 2,286 | 605 | 1,201 | 413 |
| Middlesex County [NJ] | 2,283 | 478 | 973 | 259 |
| Santa Clara County [CA] | 2,275 | 467 | 543 | 191 |
| Broward County [FL] | 2,268 | 418 | 1,030 | 249 |
| Middlesex County [MA] | 2,257 | 454 | 410 | 159 |
| Morris County [NJ] | 2,240 | 480 | 626 | 263 |
| Bucks County [PA] | 2,207 | 432 | 805 | 201 |
| Orange County [CA] | 2,140 | 496 | 706 | 288 |
| Fairfield County [CT] | 2,011 | 434 | 640 | 230 |
| Montgomery County [MD] | 1,938 | 391 | 359 | 131 |
| Allegheny County [PA] | 1,822 | 282 | 520 | 139 |
| Suffolk County [NY] | 1,815 | 511 | 1,000 | 436 |
| Harris County [TX] | 1,808 | 450 | 386 | 189 |
| Franklin County [OH] | 1,806 | 551 | 571 | 214 |
| Westchester County [NY] | 1,771 | 343 | 597 | 217 |
| Hampden County [MA] | 1,756 | 560 | 987 | 327 |
| Union County [NJ] | 1,741 | 372 | 734 | 245 |
| Richmond County [NY] | 1,720 | 601 | 620 | 225 |
| Montgomery County [PA] | 1,558 | 374 | 435 | 195 |
| Erie County [NY] | 1,529 | 290 | 712 | 195 |
| Fairfax County [VA] | 1,483 | 409 | 293 | 175 |
| Hartford County [CT] | 1,460 | 369 | 493 | 175 |
| Kane County [IL] | 1,378 | 752 | 647 | 500 |
| Lake County [IL] | 1,361 | 322 | 464 | 170 |
| Palm Beach County [FL] | 1,342 | 363 | 419 | 187 |
| Mercer County [NJ] | 1,318 | 416 | 516 | 209 |
| Contra Costa County [CA] | 1,295 | 370 | 357 | 157 |
| Will County [IL] | 1,230 | 412 | 381 | 215 |
| Bronx County [NY] | 1,157 | 328 | 557 | 180 |
| Hennepin County [MN] | 1,140 | 268 | 382 | 141 |
| Mecklenburg County [NC] | 1,068 | 474 | 204 | 128 |
| Gwinnett County [GA] | 1,054 | 354 | 377 | 190 |
| Somerset County [NJ] | 1,051 | 348 | 331 | 214 |
| Essex County [NJ] | 1,048 | 319 | 313 | 119 |
| Orange County [FL] | 1,034 | 361 | 299 | 234 |
| Ocean County [NJ] | 1,028 | 312 | 494 | 222 |
| San Mateo County [CA] | 1,008 | 458 | 357 | 157 |
| St. Louis County [MO] | 999 | 361 | 238 | 169 |
| San Francisco County [CA] | 975 | 285 | 371 | 221 |
| Nassau County [NY] | 972 | 295 | 264 | 120 |
| Hudson County [NJ] | 942 | 214 | 386 | 133 |
| Baltimore County [MD] | 931 | 316 | 301 | 175 |
| Wake County [NC] | 910 | 327 | 228 | 129 |
| Alameda County [CA] | 905 | 286 | 266 | 166 |
| Rockland County [NY] | 867 | 389 | 472 | 246 |
| Monmouth County [NJ] | 829 | 240 | 224 | 107 |
| Fresno County [CA] | 803 | 385 | 328 | 190 |
| Placer County [CA] | 769 | 271 | 303 | 134 |
| Fulton County [GA] | 760 | 274 | 234 | 135 |
| Cobb County [GA] | 740 | 252 | 257 | 144 |
| Norfolk County [MA] | 735 | 298 | 201 | 153 |
| Washington County [OR] | 723 | 303 | 252 | 179 |
| Tarrant County [TX] | 720 | 276 | 242 | 168 |
| Suffolk County [MA] | 706 | 263 | 169 | 83 |
| New Haven County [CT] | 701 | 272 | 278 | 193 |
| Travis County [TX] | 693 | 361 | 159 | 143 |
| Duval County [FL] | 684 | 265 | 245 | 138 |
| Miami-Dade County [FL] | 679 | 244 | 295 | 154 |
| District of Columbia [DC] | 674 | 194 | 91 | 50 |
| Hillsborough County [FL] | 668 | 270 | 169 | 112 |
| Orange County [NY] | 652 | 250 | 244 | 158 |
| Milwaukee County [WI] | 634 | 190 | 248 | 104 |
| Riverside County [CA] | 627 | 226 | 87 | 70 |
| Arapahoe County [CO] | 625 | 220 | 183 | 110 |
| Hamilton County [OH] | 604 | 374 | 211 | 136 |
| Salt Lake County [UT] | 602 | 246 | 176 | 86 |
| Lancaster County [PA] | 569 | 303 | 360 | 251 |
| Dane County [WI] | 569 | 217 | 189 | 117 |
| Denton County [TX] | 568 | 623 | 90 | 85 |
| Delaware County [PA] | 557 | 169 | 238 | 112 |
| Atlantic County [NJ] | 534 | 273 | 124 | 103 |
| Collin County [TX] | 522 | 189 | 167 | 128 |
| Collier County [FL] | 467 | 167 | 98 | 57 |
| Chester County [PA] | 458 | 200 | 169 | 158 |
| Arlington County [VA] | 430 | 170 | 18 | 20 |
| Dallas County [TX] | 429 | 156 | 99 | 72 |
| New Castle County [DE] | 427 | 192 | 145 | 87 |
| Camden County [NJ] | 411 | 188 | 137 | 89 |
| Ventura County [CA] | 389 | 175 | 108 | 102 |
| Prince William County [VA] | 387 | 147 | 68 | 68 |
| Pima County [AZ] | 381 | 147 | 30 | 32 |
| Honolulu County [HI] | 379 | 217 | 60 | 67 |
| Prince George s County [MD] | 379 | 280 | 180 | 183 |
| Providence County [RI] | 377 | 147 | 112 | 90 |
| Sonoma County [CA] | 375 | 199 | 110 | 77 |
| Anne Arundel County [MD] | 375 | 143 | 151 | 98 |
| Yolo County [CA] | 362 | 354 | 123 | 149 |
| Bexar County [TX] | 361 | 192 | 20 | 20 |
| Jefferson County [KY] | 354 | 217 | 168 | 133 |
| Fort Bend County [TX] | 344 | 137 | 55 | 38 |
| Ramsey County [MN] | 338 | 138 | 88 | 61 |
| Burlington County [NJ] | 336 | 157 | 43 | 39 |
| Lee County [FL] | 325 | 144 | 138 | 84 |
| Santa Barbara County [CA] | 318 | 176 | 105 | 83 |
| Loudoun County [VA] | 317 | 190 | 108 | 78 |
| Denver County [CO] | 304 | 97 | 121 | 57 |
| Albany County [NY] | 303 | 138 | 130 | 76 |
| Plymouth County [MA] | 302 | 200 | (B) | - |
| El Paso County [CO] | 292 | 162 | 55 | 52 |
| Baltimore city [MD] | 287 | 110 | 68 | 46 |
| Dakota County [MN] | 277 | 120 | 47 | 32 |
| Washtenaw County [MI] | 276 | 95 | 57 | 37 |
| San Bernardino County [CA] | 274 | 170 | 132 | 126 |
| Howard County [MD] | 274 | 157 | 26 | 45 |
| Virginia Beach city [VA] | 240 | 161 | 73 | 69 |
| Monterey County [CA] | 239 | 121 | 113 | 77 |
| Henrico County [VA] | 231 | 210 | 55 | 79 |
| Marion County [IN] | 227 | 98 | 42 | 35 |
| DeKalb County [GA] | 222 | 131 | 63 | 59 |
| Anchorage Municipality [AK] | 221 | 190 | 68 | 63 |
| Washoe County [NV] | 213 | 107 | 37 | 37 |
| Bernalillo County [NM] | 200 | 146 | 97 | 128 |
| Essex County [MA] | 195 | 76 | 29 | 29 |
| Worcester County [MA] | 195 | 91 | 45 | 42 |
| Guilford County [NC] | 171 | 112 | 71 | 60 |
| Johnson County [KS] | 159 | 72 | 24 | 27 |
| San Joaquin County [CA] | 107 | 105 | 24 | 38 |
| Oklahoma County [OK] | 97 | 68 | (B) | - |
| Hawaii County [HI] | 93 | 87 | 6 | 9 |
| Bristol County [MA] | 86 | 67 | 49 | 39 |
| Polk County [IA] | 84 | 72 | 42 | 59 |
| Kern County [CA] | 83 | 77 | 26 | 41 |
| Hillsborough County [NH] | 80 | 58 | 31 | 33 |
| Shelby County [TN] | 78 | 55 | 28 | 37 |
| Maui County [HI] | 77 | 79 | (B) | - |
| Jefferson Parish [LA] | 64 | 62 | 4 | 6 |
| Solano County [CA] | 56 | 74 | 12 | 19 |
| Davidson County [TN] | 54 | 53 | (B) | - |
| San Juan County [NM] | 29 | 44 | 29 | 44 |
| Stanislaus County [CA] | 24 | 30 | 24 | 30 |
| Navajo County [AZ] | 11 | 18 | (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] | 41,819 | 1,940 | 17,786 | 1,199 |
| Chicago-Naperville-Elgin [IL-IN] | 34,689 | 2,253 | 15,803 | 1,257 |
| Seattle-Tacoma-Bellevue [WA] | 19,054 | 2,135 | 9,571 | 1,274 |
| Sacramento-Roseville-Arden-Arcade [CA] | 12,099 | 1,561 | 7,175 | 1,039 |
| Detroit-Warren-Dearborn [MI] | 11,083 | 1,003 | 4,340 | 470 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 11,008 | 1,198 | 4,458 | 783 |
| Portland-Vancouver-Hillsboro [OR-WA] | 10,266 | 1,613 | 5,243 | 901 |
| Cleveland-Elyria [OH] | 9,315 | 913 | 3,981 | 529 |
| Los Angeles-Long Beach-Anaheim [CA] | 8,165 | 956 | 2,794 | 546 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 6,892 | 813 | 1,559 | 412 |
| San Francisco-Oakland-Hayward [CA] | 4,548 | 790 | 1,409 | 365 |
| Boston-Cambridge-Newton [MA-NH] | 4,447 | 683 | 903 | 277 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 4,289 | 613 | 1,744 | 368 |
| Atlanta-Sandy Springs-Roswell [GA] | 3,730 | 629 | 1,261 | 314 |
| Tampa-St. Petersburg-Clearwater [FL] | 3,591 | 574 | 1,236 | 340 |
| Rochester [NY] | 3,491 | 587 | 1,573 | 344 |
| Pittsburgh [PA] | 3,375 | 417 | 776 | 166 |
| Phoenix-Mesa-Scottsdale [AZ] | 3,177 | 576 | 854 | 261 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 3,131 | 496 | 1,006 | 255 |
| Houston-The Woodlands-Sugar Land [TX] | 2,710 | 500 | 522 | 197 |
| Las Vegas-Henderson-Paradise [NV] | 2,656 | 544 | 1,117 | 331 |
| Dallas-Fort Worth-Arlington [TX] | 2,625 | 641 | 695 | 247 |
| San Diego-Carlsbad [CA] | 2,616 | 478 | 887 | 298 |
| Denver-Aurora-Lakewood [CO] | 2,570 | 554 | 981 | 346 |
| Syracuse [NY] | 2,463 | 510 | 1,023 | 248 |
| New York-Newark-Jersey City [NY-NJ-PA] | 2,330 | 634 | 814 | 339 |
| San Jose-Sunnyvale-Santa Clara [CA] | 2,288 | 469 | 543 | 191 |
| Baltimore-Columbia-Towson [MD] | 2,232 | 446 | 623 | 227 |
| Columbus [OH] | 2,231 | 553 | 695 | 217 |
| Bridgeport-Stamford-Norwalk [CT] | 2,011 | 434 | 640 | 230 |
| Charlotte-Concord-Gastonia [NC-SC] | 1,957 | 591 | 513 | 229 |
| Springfield [MA] | 1,920 | 583 | 1,084 | 350 |
| Orlando-Kissimmee-Sanford [FL] | 1,805 | 412 | 574 | 267 |
| Allentown-Bethlehem-Easton [PA-NJ] | 1,788 | 325 | 553 | 169 |
| St. Louis [MO-IL] | 1,740 | 497 | 494 | 224 |
| Hartford-West Hartford-East Hartford [CT] | 1,682 | 407 | 513 | 177 |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 1,662 | 276 | 757 | 204 |
| Spokane-Spokane Valley [WA] | 1,382 | 437 | 866 | 311 |
| Trenton [NJ] | 1,318 | 416 | 516 | 209 |
| Milwaukee-Waukesha-West Allis [WI] | 1,258 | 287 | 377 | 127 |
| Albany-Schenectady-Troy [NY] | 1,123 | 515 | 531 | 284 |
| Austin-Round Rock [TX] | 1,087 | 401 | 243 | 166 |
| Raleigh [NC] | 960 | 341 | 228 | 129 |
| Cincinnati [OH-KY-IN] | 955 | 416 | 285 | 151 |
| Riverside-San Bernardino-Ontario [CA] | 901 | 295 | 219 | 149 |
| Jacksonville [FL] | 892 | 293 | 300 | 154 |
| Indianapolis-Carmel-Anderson [IN] | 849 | 328 | 134 | 95 |
| Fresno [CA] | 803 | 385 | 328 | 190 |
| Omaha-Council Bluffs [NE-IA] | 767 | 209 | 177 | 95 |
| New Haven-Milford [CT] | 701 | 272 | 278 | 193 |
| Anchorage [AK] | 695 | 516 | 492 | 482 |
| Akron [OH] | 677 | 236 | 163 | 67 |
| Salt Lake City [UT] | 658 | 264 | 203 | 100 |
| Deltona-Daytona Beach-Ormond Beach [FL] | 633 | 356 | 404 | 347 |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 612 | 248 | 177 | 104 |
| Madison [WI] | 586 | 219 | 191 | 117 |
| Providence-Warwick [RI-MA] | 575 | 179 | 184 | 96 |
| Lancaster [PA] | 569 | 303 | 360 | 251 |
| Atlantic City-Hammonton [NJ] | 534 | 273 | 124 | 103 |
| Richmond [VA] | 482 | 214 | 88 | 85 |
| Naples-Immokalee-Marco Island [FL] | 467 | 167 | 98 | 57 |
| San Antonio-New Braunfels [TX] | 447 | 204 | 38 | 31 |
| Durham-Chapel Hill [NC] | 403 | 173 | 19 | 21 |
| Grand Rapids-Wyoming [MI] | 402 | 291 | 64 | 47 |
| Harrisburg-Carlisle [PA] | 402 | 214 | 81 | 93 |
| Oxnard-Thousand Oaks-Ventura [CA] | 389 | 175 | 108 | 102 |
| Tucson [AZ] | 381 | 147 | 30 | 32 |
| Urban Honolulu [HI] | 379 | 217 | 60 | 67 |
| Louisville Jefferson County [KY] | 375 | 218 | 175 | 133 |
| Santa Rosa [CA] | 375 | 199 | 110 | 77 |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 365 | 265 | 54 | 73 |
| Kansas City [MO-KS] | 326 | 111 | 32 | 29 |
| Cape Coral-Fort Myers [FL] | 325 | 144 | 138 | 84 |
| Santa Maria-Santa Barbara [CA] | 318 | 176 | 105 | 83 |
| Colorado Springs [CO] | 292 | 162 | 55 | 52 |
| Ann Arbor [MI] | 276 | 95 | 57 | 37 |
| Portland-South Portland [ME] | 267 | 135 | 70 | 48 |
| Worcester [MA-CT] | 256 | 96 | 57 | 43 |
| New Orleans-Metairie [LA] | 243 | 131 | 33 | 47 |
| Salinas [CA] | 239 | 121 | 113 | 77 |
| Albuquerque [NM] | 215 | 151 | 97 | 128 |
| Reno [NV] | 213 | 107 | 37 | 37 |
| Tulsa [OK] | 209 | 157 | 57 | 91 |
| Dayton [OH] | 197 | 109 | 14 | 17 |
| Oklahoma City [OK] | 191 | 114 | (B) | - |
| Greensboro-High Point [NC] | 171 | 112 | 71 | 60 |
| Lansing-East Lansing [MI] | 171 | 86 | 42 | 33 |
| Des Moines-West Des Moines [IA] | 113 | 79 | 65 | 68 |
| Stockton-Lodi [CA] | 107 | 105 | 24 | 38 |
| Hilo [HI] | 93 | 87 | 6 | 9 |
| Bakersfield [CA] | 83 | 77 | 26 | 41 |
| Baton Rouge [LA] | 81 | 60 | 24 | 39 |
| Manchester-Nashua [NH] | 80 | 58 | 31 | 33 |
| Memphis [TN-MS-AR] | 78 | 55 | 28 | 37 |
| Kahului-Wailuku-Lahaina [HI] | 77 | 79 | (B) | - |
| Vallejo-Fairfield [CA] | 56 | 74 | 12 | 19 |
| Lafayette [LA] | 45 | 42 | 10 | 16 |
| Farmington [NM] | 29 | 44 | 29 | 44 |
| Modesto [CA] | 24 | 30 | 24 | 30 |
| Show Low [AZ] | 11 | 18 | (B) | - |