| Country | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| United States | 267,979 | 7,071 | 103,432 | 3,261 |
| State | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| New York | 34,025 | 2,178 | 13,233 | 1,081 |
| Illinois | 31,264 | 2,214 | 12,478 | 1,208 |
| California | 22,753 | 1,635 | 6,179 | 700 |
| Florida | 17,890 | 1,757 | 7,205 | 999 |
| Missouri | 13,498 | 1,505 | 6,478 | 794 |
| Michigan | 13,009 | 1,413 | 5,695 | 727 |
| Ohio | 12,868 | 1,146 | 4,877 | 568 |
| New Jersey | 8,967 | 891 | 3,361 | 481 |
| Iowa | 8,635 | 960 | 4,003 | 598 |
| Pennsylvania | 8,533 | 1,012 | 3,071 | 432 |
| Arizona | 8,370 | 1,302 | 3,210 | 582 |
| Texas | 7,897 | 1,062 | 2,526 | 466 |
| Georgia | 7,444 | 1,233 | 3,381 | 658 |
| Indiana | 7,265 | 897 | 2,822 | 469 |
| Washington | 5,259 | 878 | 1,723 | 329 |
| Kentucky | 5,067 | 740 | 2,569 | 475 |
| Wisconsin | 4,915 | 727 | 1,997 | 489 |
| Massachusetts | 4,806 | 1,011 | 1,454 | 391 |
| Virginia | 4,552 | 784 | 1,444 | 362 |
| Connecticut | 4,160 | 721 | 1,636 | 374 |
| Minnesota | 3,948 | 728 | 1,570 | 342 |
| Utah | 3,842 | 618 | 1,711 | 303 |
| Nevada | 3,824 | 899 | 1,681 | 500 |
| North Carolina | 3,479 | 654 | 1,385 | 342 |
| Idaho | 2,533 | 794 | 847 | 328 |
| Colorado | 2,531 | 500 | 987 | 225 |
| Tennessee | 2,490 | 498 | 917 | 282 |
| Maryland | 2,121 | 450 | 674 | 251 |
| Oregon | 1,801 | 493 | 849 | 284 |
| New Hampshire | 1,504 | 450 | 688 | 274 |
| Vermont | 1,196 | 365 | 572 | 190 |
| Louisiana | 990 | 448 | 309 | 179 |
| South Carolina | 713 | 380 | 34 | 38 |
| South Dakota | 676 | 363 | 369 | 255 |
| Kansas | 675 | 194 | 256 | 102 |
| North Dakota | 649 | 334 | 205 | 115 |
| Nebraska | 556 | 249 | 220 | 162 |
| District of Columbia | 486 | 198 | 81 | 50 |
| Alabama | 465 | 244 | 137 | 102 |
| New Mexico | 409 | 240 | 15 | 21 |
| Rhode Island | 294 | 212 | 37 | 42 |
| Oklahoma | 286 | 126 | 78 | 62 |
| Maine | 251 | 109 | 123 | 76 |
| West Virginia | 218 | 238 | 104 | 127 |
| Delaware | 216 | 125 | 38 | 38 |
| Arkansas | 211 | 117 | 132 | 100 |
| Hawaii | 187 | 128 | 31 | 37 |
| Mississippi | 97 | 69 | 18 | 18 |
| Montana | 81 | 63 | 6 | 11 |
| Wyoming | 41 | 35 | 9 | 14 |
| Alaska | 32 | 31 | 7 | 11 |
| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Cook County [IL] | 22,618 | 1,743 | 9,282 | 959 |
| Queens County [NY] | 9,498 | 1,091 | 3,835 | 529 |
| St. Louis County [MO] | 8,689 | 1,231 | 4,163 | 650 |
| Maricopa County [AZ] | 7,574 | 1,253 | 3,049 | 569 |
| Los Angeles County [CA] | 6,654 | 883 | 1,435 | 275 |
| Cuyahoga County [OH] | 4,997 | 682 | 2,247 | 373 |
| Macomb County [MI] | 4,920 | 923 | 2,434 | 452 |
| Pinellas County [FL] | 4,662 | 943 | 2,048 | 537 |
| Polk County [IA] | 4,452 | 890 | 2,075 | 475 |
| Gwinnett County [GA] | 4,424 | 967 | 1,945 | 582 |
| Duval County [FL] | 4,380 | 905 | 2,316 | 666 |
| Salt Lake County [UT] | 3,755 | 620 | 1,711 | 303 |
| DuPage County [IL] | 3,731 | 766 | 1,334 | 296 |
| Clark County [NV] | 3,619 | 905 | 1,668 | 502 |
| Santa Clara County [CA] | 3,309 | 741 | 994 | 284 |
| Milwaukee County [WI] | 2,943 | 605 | 1,308 | 465 |
| New York County [NY] | 2,771 | 768 | 638 | 279 |
| Bergen County [NJ] | 2,735 | 630 | 1,005 | 316 |
| Kings County [NY] | 2,621 | 559 | 1,231 | 366 |
| San Diego County [CA] | 2,614 | 574 | 708 | 276 |
| King County [WA] | 2,437 | 528 | 793 | 253 |
| Wayne County [MI] | 2,371 | 527 | 1,013 | 280 |
| Jefferson County [KY] | 2,174 | 563 | 1,175 | 359 |
| Allegheny County [PA] | 1,960 | 387 | 698 | 233 |
| Nassau County [NY] | 1,921 | 388 | 690 | 195 |
| Hartford County [CT] | 1,863 | 480 | 831 | 259 |
| Dallas County [TX] | 1,808 | 585 | 634 | 249 |
| Harris County [TX] | 1,771 | 441 | 474 | 176 |
| Bronx County [NY] | 1,729 | 661 | 719 | 264 |
| Middlesex County [MA] | 1,720 | 589 | 495 | 189 |
| Onondaga County [NY] | 1,703 | 470 | 861 | 276 |
| Westchester County [NY] | 1,681 | 503 | 554 | 229 |
| Lake County [IL] | 1,613 | 408 | 555 | 190 |
| Alameda County [CA] | 1,574 | 523 | 377 | 160 |
| Orange County [CA] | 1,564 | 393 | 474 | 195 |
| Sacramento County [CA] | 1,486 | 448 | 718 | 327 |
| Passaic County [NJ] | 1,323 | 377 | 689 | 238 |
| Mecklenburg County [NC] | 1,300 | 484 | 653 | 329 |
| Richmond County [NY] | 1,295 | 553 | 419 | 245 |
| Suffolk County [NY] | 1,271 | 436 | 476 | 207 |
| Suffolk County [MA] | 1,252 | 420 | 501 | 208 |
| Henrico County [VA] | 1,178 | 497 | 489 | 231 |
| Hennepin County [MN] | 1,128 | 354 | 521 | 180 |
| Hillsborough County [NH] | 1,111 | 408 | 543 | 271 |
| Erie County [NY] | 1,097 | 416 | 399 | 221 |
| Tarrant County [TX] | 1,081 | 366 | 544 | 215 |
| Oakland County [MI] | 1,072 | 242 | 366 | 119 |
| San Francisco County [CA] | 1,045 | 346 | 394 | 262 |
| Palm Beach County [FL] | 1,017 | 341 | 231 | 165 |
| Broward County [FL] | 996 | 315 | 236 | 120 |
| Multnomah County [OR] | 931 | 371 | 508 | 232 |
| Fairfax County [VA] | 910 | 406 | 190 | 122 |
| Guilford County [NC] | 897 | 297 | 391 | 135 |
| Fairfield County [CT] | 895 | 317 | 314 | 143 |
| Morris County [NJ] | 856 | 336 | 309 | 205 |
| Orange County [FL] | 844 | 377 | 436 | 260 |
| New Haven County [CT] | 811 | 285 | 289 | 147 |
| Hillsborough County [FL] | 762 | 315 | 271 | 160 |
| Monroe County [NY] | 750 | 261 | 326 | 130 |
| Hudson County [NJ] | 683 | 264 | 324 | 196 |
| Philadelphia County [PA] | 679 | 304 | 264 | 160 |
| Davidson County [TN] | 657 | 310 | 178 | 117 |
| Essex County [MA] | 635 | 270 | 207 | 110 |
| Collin County [TX] | 628 | 243 | 233 | 144 |
| Fulton County [GA] | 616 | 312 | 252 | 158 |
| Snohomish County [WA] | 613 | 361 | 117 | 89 |
| Will County [IL] | 606 | 227 | 234 | 114 |
| Travis County [TX] | 567 | 232 | 196 | 116 |
| Montgomery County [MD] | 566 | 272 | 205 | 129 |
| Riverside County [CA] | 560 | 240 | 196 | 101 |
| Franklin County [OH] | 560 | 279 | 217 | 153 |
| San Mateo County [CA] | 551 | 208 | 123 | 76 |
| Cobb County [GA] | 540 | 325 | 221 | 157 |
| Bexar County [TX] | 506 | 319 | 81 | 66 |
| Pima County [AZ] | 489 | 168 | 152 | 81 |
| Miami-Dade County [FL] | 489 | 207 | 116 | 84 |
| District of Columbia [DC] | 486 | 198 | 81 | 50 |
| Contra Costa County [CA] | 477 | 240 | 166 | 100 |
| Clark County [WA] | 467 | 208 | 129 | 90 |
| Arapahoe County [CO] | 456 | 210 | 188 | 112 |
| DeKalb County [GA] | 450 | 285 | 294 | 219 |
| Lancaster County [PA] | 450 | 227 | 252 | 141 |
| Ventura County [CA] | 448 | 203 | 66 | 54 |
| Lee County [FL] | 447 | 245 | 136 | 100 |
| Norfolk County [MA] | 435 | 140 | (B) | - |
| Rockland County [NY] | 423 | 202 | 118 | 70 |
| Hampden County [MA] | 422 | 419 | 184 | 192 |
| Washington County [OR] | 405 | 211 | 159 | 93 |
| Denver County [CO] | 378 | 139 | 215 | 100 |
| Bucks County [PA] | 364 | 189 | 113 | 80 |
| El Paso County [CO] | 363 | 287 | 162 | 135 |
| Burlington County [NJ] | 362 | 238 | 146 | 104 |
| Baltimore County [MD] | 357 | 167 | 127 | 76 |
| Monmouth County [NJ] | 352 | 197 | 82 | 60 |
| Marion County [IN] | 345 | 160 | 135 | 94 |
| Union County [NJ] | 343 | 196 | 128 | 110 |
| Mercer County [NJ] | 330 | 227 | 73 | 53 |
| Shelby County [TN] | 325 | 219 | 67 | 63 |
| Washtenaw County [MI] | 324 | 188 | 91 | 95 |
| Middlesex County [NJ] | 320 | 141 | 32 | 33 |
| Atlantic County [NJ] | 314 | 175 | 110 | 72 |
| Chester County [PA] | 287 | 227 | 107 | 86 |
| Kane County [IL] | 283 | 197 | 97 | 113 |
| San Joaquin County [CA] | 279 | 189 | 41 | 28 |
| Loudoun County [VA] | 271 | 157 | 51 | 70 |
| Worcester County [MA] | 268 | 129 | 67 | 61 |
| Essex County [NJ] | 258 | 156 | 86 | 81 |
| Bernalillo County [NM] | 251 | 214 | 15 | 21 |
| Delaware County [PA] | 244 | 125 | 33 | 29 |
| Prince George s County [MD] | 237 | 167 | 86 | 102 |
| Pierce County [WA] | 224 | 120 | 46 | 41 |
| Virginia Beach city [VA] | 218 | 147 | 64 | 56 |
| Albany County [NY] | 216 | 152 | 108 | 78 |
| San Bernardino County [CA] | 202 | 104 | 56 | 50 |
| Baltimore city [MD] | 200 | 108 | 30 | 34 |
| Dakota County [MN] | 195 | 122 | 55 | 65 |
| New Castle County [DE] | 193 | 130 | 35 | 37 |
| Prince William County [VA] | 192 | 155 | 30 | 45 |
| Denton County [TX] | 189 | 164 | 68 | 72 |
| Jefferson Parish [LA] | 177 | 98 | 69 | 50 |
| Sonoma County [CA] | 174 | 121 | 11 | 18 |
| Hamilton County [OH] | 174 | 90 | 83 | 67 |
| Washoe County [NV] | 173 | 129 | 13 | 21 |
| Ocean County [NJ] | 165 | 89 | 56 | 48 |
| Ramsey County [MN] | 158 | 90 | 43 | 40 |
| Honolulu County [HI] | 156 | 128 | 31 | 37 |
| Montgomery County [PA] | 155 | 72 | 37 | 45 |
| Orange County [NY] | 152 | 145 | 24 | 37 |
| Placer County [CA] | 147 | 96 | 35 | 31 |
| Howard County [MD] | 146 | 131 | 57 | 68 |
| Dane County [WI] | 146 | 88 | 17 | 26 |
| Camden County [NJ] | 144 | 115 | 38 | 36 |
| Anne Arundel County [MD] | 138 | 127 | 70 | 110 |
| Somerset County [NJ] | 132 | 80 | 28 | 32 |
| Wake County [NC] | 132 | 92 | (B) | - |
| Collier County [FL] | 130 | 77 | 19 | 15 |
| Arlington County [VA] | 130 | 95 | 37 | 45 |
| Santa Barbara County [CA] | 118 | 79 | 8 | 14 |
| Fort Bend County [TX] | 115 | 121 | 38 | 66 |
| Oklahoma County [OK] | 104 | 98 | 22 | 33 |
| Monterey County [CA] | 99 | 86 | 7 | 9 |
| Fresno County [CA] | 90 | 73 | 3 | 5 |
| Stanislaus County [CA] | 86 | 70 | 29 | 33 |
| Providence County [RI] | 70 | 58 | 37 | 42 |
| Solano County [CA] | 50 | 57 | 25 | 29 |
| Kern County [CA] | 43 | 42 | (B) | - |
| Yolo County [CA] | 39 | 38 | (B) | - |
| Johnson County [KS] | 30 | 32 | 18 | 28 |
| Anchorage Municipality [AK] | 13 | 21 | (B) | - |
| Hawaii County [HI] | 13 | 20 | (B) | - |
| San Juan County [NM] | 12 | 19 | (B) | - |
| Bristol County [MA] | 9 | 15 | (B) | - |
| Navajo County [AZ] | 6 | 9 | (B) | - |
| City / Metropolitan area / CBSA | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Chicago-Naperville-Elgin [IL-IN] | 33,495 | 2,276 | 13,401 | 1,297 |
| New York-Newark-Jersey City [NY] | 31,560 | 2,082 | 11,799 | 1,113 |
| St. Louis [MO-IL] | 12,254 | 1,408 | 5,962 | 757 |
| Cleveland-Elyria [OH] | 8,799 | 925 | 3,646 | 492 |
| Detroit-Warren-Dearborn [MI] | 8,671 | 1,074 | 3,911 | 528 |
| Los Angeles-Long Beach-Anaheim [CA] | 8,218 | 941 | 1,909 | 333 |
| Phoenix-Mesa-Scottsdale [AZ] | 7,632 | 1,258 | 3,049 | 569 |
| Atlanta-Sandy Springs-Roswell [GA] | 6,871 | 1,183 | 3,135 | 639 |
| Tampa-St. Petersburg-Clearwater [FL] | 6,174 | 993 | 2,658 | 569 |
| Des Moines-West Des Moines [IA] | 4,802 | 921 | 2,169 | 484 |
| Jacksonville [FL] | 4,636 | 901 | 2,433 | 654 |
| Boston-Cambridge-Newton [MA-NH] | 4,215 | 916 | 1,235 | 352 |
| San Francisco-Oakland-Hayward [CA] | 3,951 | 688 | 1,135 | 335 |
| Dallas-Fort Worth-Arlington [TX] | 3,805 | 760 | 1,546 | 357 |
| Salt Lake City [UT] | 3,755 | 620 | 1,711 | 303 |
| Las Vegas-Henderson-Paradise [NV] | 3,619 | 905 | 1,668 | 502 |
| Milwaukee-Waukesha-West Allis [WI] | 3,355 | 635 | 1,495 | 458 |
| San Jose-Sunnyvale-Santa Clara [CA] | 3,309 | 741 | 994 | 284 |
| Seattle-Tacoma-Bellevue [WA] | 3,274 | 726 | 956 | 274 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 2,974 | 623 | 695 | 261 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 2,942 | 642 | 1,217 | 332 |
| Grand Rapids-Wyoming [MI] | 2,825 | 580 | 1,324 | 325 |
| San Diego-Carlsbad [CA] | 2,614 | 574 | 708 | 276 |
| Pittsburgh [PA] | 2,526 | 392 | 793 | 247 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 2,502 | 560 | 583 | 222 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 2,444 | 551 | 773 | 232 |
| Louisville Jefferson County [KY] | 2,284 | 566 | 1,193 | 360 |
| Houston-The Woodlands-Sugar Land [TX] | 2,233 | 538 | 562 | 202 |
| Hartford-West Hartford-East Hartford [CT] | 2,160 | 506 | 932 | 270 |
| Portland-Vancouver-Hillsboro [OR-WA] | 2,146 | 526 | 946 | 289 |
| Charlotte-Concord-Gastonia [NC-SC] | 1,764 | 545 | 819 | 313 |
| Orlando-Kissimmee-Sanford [FL] | 1,757 | 728 | 742 | 359 |
| Syracuse [NY] | 1,728 | 467 | 886 | 277 |
| Sacramento-Roseville-Arden-Arcade [CA] | 1,691 | 452 | 763 | 328 |
| Akron [OH] | 1,664 | 505 | 516 | 189 |
| Denver-Aurora-Lakewood [CO] | 1,641 | 369 | 685 | 185 |
| Harrisburg-Carlisle [PA] | 1,370 | 410 | 517 | 192 |
| Richmond [VA] | 1,299 | 508 | 507 | 233 |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 1,119 | 415 | 410 | 222 |
| Manchester-Nashua [NH] | 1,111 | 408 | 543 | 271 |
| Kansas City [MO-KS] | 1,091 | 283 | 438 | 150 |
| Rochester [NY] | 1,064 | 415 | 409 | 156 |
| Greensboro-High Point [NC] | 897 | 297 | 391 | 135 |
| Bridgeport-Stamford-Norwalk [CT] | 895 | 317 | 314 | 143 |
| Baltimore-Columbia-Towson [MD] | 875 | 267 | 284 | 156 |
| Allentown-Bethlehem-Easton [PA-NJ] | 855 | 505 | 274 | 202 |
| Indianapolis-Carmel-Anderson [IN] | 826 | 268 | 245 | 119 |
| Austin-Round Rock [TX] | 818 | 398 | 260 | 139 |
| New Haven-Milford [CT] | 811 | 285 | 289 | 147 |
| Cincinnati [OH-KY-IN] | 765 | 341 | 292 | 147 |
| Riverside-San Bernardino-Ontario [CA] | 762 | 257 | 252 | 117 |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 760 | 317 | 205 | 120 |
| New Orleans-Metairie [LA] | 690 | 373 | 223 | 146 |
| Columbus [OH] | 633 | 285 | 241 | 159 |
| Albany-Schenectady-Troy [NY] | 596 | 284 | 155 | 93 |
| Spokane-Spokane Valley [WA] | 563 | 339 | 275 | 204 |
| New York-Newark-Jersey City [NY-NJ-PA] | 537 | 225 | 152 | 75 |
| San Antonio-New Braunfels [TX] | 506 | 319 | 81 | 66 |
| Tucson [AZ] | 489 | 168 | 152 | 81 |
| Lancaster [PA] | 450 | 227 | 252 | 141 |
| Oxnard-Thousand Oaks-Ventura [CA] | 448 | 203 | 66 | 54 |
| Cape Coral-Fort Myers [FL] | 447 | 245 | 136 | 100 |
| Springfield [MA] | 431 | 419 | 184 | 192 |
| Lansing-East Lansing [MI] | 396 | 216 | 157 | 122 |
| Colorado Springs [CO] | 363 | 287 | 162 | 135 |
| Memphis [TN-MS-AR] | 342 | 221 | 67 | 63 |
| Trenton [NJ] | 330 | 227 | 73 | 53 |
| Ann Arbor [MI] | 324 | 188 | 91 | 95 |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 323 | 159 | 113 | 68 |
| Atlantic City-Hammonton [NJ] | 314 | 175 | 110 | 72 |
| Providence-Warwick [RI-MA] | 303 | 212 | 37 | 42 |
| Stockton-Lodi [CA] | 279 | 189 | 41 | 28 |
| Albuquerque [NM] | 271 | 216 | 15 | 21 |
| Worcester [MA-CT] | 268 | 129 | 67 | 61 |
| Omaha-Council Bluffs [NE-IA] | 237 | 144 | 66 | 57 |
| Portland-South Portland [ME] | 226 | 114 | 106 | 76 |
| Deltona-Daytona Beach-Ormond Beach [FL] | 189 | 86 | 85 | 59 |
| Reno [NV] | 185 | 129 | 13 | 21 |
| Lafayette [LA] | 183 | 241 | 68 | 104 |
| Oklahoma City [OK] | 181 | 127 | 51 | 55 |
| Santa Rosa [CA] | 174 | 121 | 11 | 18 |
| Urban Honolulu [HI] | 156 | 128 | 31 | 37 |
| Madison [WI] | 146 | 88 | 17 | 26 |
| Raleigh [NC] | 132 | 92 | (B) | - |
| Naples-Immokalee-Marco Island [FL] | 130 | 77 | 19 | 15 |
| Santa Maria-Santa Barbara [CA] | 118 | 79 | 8 | 14 |
| Salinas [CA] | 99 | 86 | 7 | 9 |
| Durham-Chapel Hill [NC] | 90 | 64 | 14 | 23 |
| Fresno [CA] | 90 | 73 | 3 | 5 |
| Modesto [CA] | 86 | 70 | 29 | 33 |
| Tulsa [OK] | 68 | 50 | 27 | 31 |
| Vallejo-Fairfield [CA] | 50 | 57 | 25 | 29 |
| Baton Rouge [LA] | 49 | 46 | 9 | 14 |
| Bakersfield [CA] | 43 | 42 | (B) | - |
| Anchorage [AK] | 13 | 21 | (B) | - |
| Hilo [HI] | 13 | 20 | (B) | - |
| Farmington [NM] | 12 | 19 | (B) | - |
| Dayton [OH] | 7 | 11 | (B) | - |
| Show Low [AZ] | 6 | 9 | (B) | - |