| Country | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| United States | 304,932 | 5,423 | 75,799 | 2,576 |
| State | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| New York | 71,233 | 2,922 | 20,897 | 1,180 |
| Illinois | 33,302 | 2,143 | 8,438 | 747 |
| Massachusetts | 23,991 | 1,615 | 6,752 | 749 |
| California | 22,932 | 996 | 4,476 | 454 |
| Florida | 20,862 | 1,548 | 4,545 | 585 |
| New Jersey | 20,843 | 1,562 | 5,113 | 640 |
| Pennsylvania | 14,970 | 1,093 | 3,986 | 478 |
| Ohio | 10,122 | 790 | 2,368 | 316 |
| Maryland | 9,848 | 1,131 | 2,410 | 535 |
| Connecticut | 8,670 | 777 | 2,195 | 351 |
| Michigan | 7,887 | 776 | 2,043 | 368 |
| Virginia | 7,150 | 993 | 1,748 | 405 |
| Texas | 6,615 | 751 | 1,294 | 258 |
| North Carolina | 5,234 | 660 | 1,232 | 258 |
| Indiana | 4,391 | 670 | 1,085 | 280 |
| Arizona | 3,043 | 486 | 533 | 190 |
| Washington | 3,015 | 577 | 714 | 225 |
| Georgia | 2,765 | 469 | 350 | 122 |
| New Hampshire | 2,693 | 538 | 666 | 186 |
| Wisconsin | 2,372 | 450 | 644 | 237 |
| South Carolina | 2,252 | 458 | 561 | 199 |
| Nevada | 2,236 | 398 | 425 | 134 |
| Rhode Island | 1,976 | 501 | 350 | 138 |
| Colorado | 1,910 | 367 | 461 | 187 |
| Missouri | 1,474 | 354 | 378 | 146 |
| Delaware | 1,288 | 312 | 149 | 81 |
| Minnesota | 1,142 | 272 | 114 | 60 |
| Utah | 1,012 | 235 | 182 | 77 |
| Alabama | 918 | 258 | 145 | 72 |
| Tennessee | 898 | 237 | 145 | 75 |
| Oregon | 850 | 215 | 171 | 81 |
| Kentucky | 802 | 306 | 168 | 144 |
| Maine | 710 | 210 | 81 | 60 |
| Oklahoma | 698 | 218 | 52 | 43 |
| District of Columbia | 662 | 214 | 48 | 44 |
| Iowa | 562 | 250 | 69 | 44 |
| Louisiana | 540 | 188 | 88 | 51 |
| West Virginia | 405 | 122 | 67 | 38 |
| Kansas | 351 | 120 | 53 | 43 |
| Nebraska | 301 | 103 | 95 | 72 |
| New Mexico | 297 | 125 | 18 | 21 |
| Wyoming | 267 | 123 | 82 | 69 |
| Idaho | 245 | 112 | 119 | 90 |
| Mississippi | 229 | 130 | 31 | 37 |
| Hawaii | 192 | 118 | 101 | 100 |
| Vermont | 189 | 90 | 6 | 6 |
| Montana | 160 | 62 | 24 | 23 |
| Arkansas | 144 | 77 | 27 | 31 |
| Alaska | 140 | 76 | 33 | 33 |
| North Dakota | 96 | 86 | 24 | 27 |
| Puerto Rico | 55 | 67 | 9 | 13 |
| South Dakota | 48 | 37 | 43 | 38 |
| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Queens County [NY] | 30,680 | 1,993 | 10,836 | 849 |
| Cook County [IL] | 23,031 | 1,706 | 6,095 | 607 |
| Nassau County [NY] | 9,481 | 1,027 | 1,946 | 350 |
| Middlesex County [MA] | 8,251 | 815 | 2,113 | 344 |
| Kings County [NY] | 7,914 | 800 | 2,675 | 443 |
| Los Angeles County [CA] | 6,272 | 659 | 1,523 | 257 |
| Pinellas County [FL] | 5,694 | 736 | 1,671 | 358 |
| Suffolk County [NY] | 5,132 | 746 | 1,136 | 225 |
| Bergen County [NJ] | 4,972 | 780 | 1,298 | 337 |
| Essex County [MA] | 4,339 | 659 | 1,168 | 289 |
| New York County [NY] | 4,222 | 743 | 685 | 261 |
| DuPage County [IL] | 4,186 | 753 | 894 | 197 |
| Fairfield County [CT] | 4,054 | 533 | 892 | 190 |
| Montgomery County [MD] | 3,545 | 844 | 1,022 | 447 |
| Westchester County [NY] | 3,175 | 600 | 491 | 140 |
| Norfolk County [MA] | 2,951 | 502 | 889 | 263 |
| Delaware County [PA] | 2,871 | 417 | 864 | 197 |
| Suffolk County [MA] | 2,541 | 496 | 714 | 272 |
| Orange County [CA] | 2,527 | 482 | 238 | 104 |
| Broward County [FL] | 2,441 | 580 | 605 | 282 |
| Baltimore County [MD] | 2,333 | 441 | 447 | 133 |
| Harris County [TX] | 2,318 | 432 | 442 | 113 |
| Fairfax County [VA] | 2,315 | 525 | 645 | 218 |
| Worcester County [MA] | 2,259 | 438 | 734 | 221 |
| Wayne County [MI] | 2,212 | 404 | 557 | 143 |
| Maricopa County [AZ] | 2,122 | 413 | 436 | 169 |
| Bronx County [NY] | 2,121 | 546 | 788 | 309 |
| Cuyahoga County [OH] | 2,085 | 396 | 552 | 168 |
| Lake County [IL] | 2,005 | 467 | 423 | 161 |
| Middlesex County [NJ] | 2,003 | 441 | 563 | 205 |
| Clark County [NV] | 1,881 | 379 | 377 | 134 |
| Philadelphia County [PA] | 1,848 | 614 | 442 | 190 |
| Allegheny County [PA] | 1,817 | 398 | 460 | 175 |
| San Diego County [CA] | 1,803 | 386 | 297 | 133 |
| Palm Beach County [FL] | 1,799 | 523 | 231 | 113 |
| Mecklenburg County [NC] | 1,799 | 398 | 451 | 145 |
| Santa Clara County [CA] | 1,778 | 466 | 497 | 179 |
| Morris County [NJ] | 1,777 | 416 | 368 | 151 |
| Oakland County [MI] | 1,612 | 292 | 389 | 154 |
| Macomb County [MI] | 1,604 | 298 | 428 | 135 |
| King County [WA] | 1,599 | 465 | 477 | 204 |
| Hartford County [CT] | 1,581 | 289 | 434 | 142 |
| Ocean County [NJ] | 1,529 | 486 | 360 | 215 |
| Hillsborough County [NH] | 1,441 | 339 | 410 | 163 |
| Alameda County [CA] | 1,433 | 383 | 203 | 83 |
| San Francisco County [CA] | 1,390 | 386 | 221 | 120 |
| Miami-Dade County [FL] | 1,353 | 375 | 190 | 101 |
| Richmond County [NY] | 1,309 | 451 | 417 | 186 |
| New Haven County [CT] | 1,265 | 299 | 266 | 132 |
| Hudson County [NJ] | 1,265 | 396 | 276 | 147 |
| Providence County [RI] | 1,251 | 367 | 216 | 99 |
| Monmouth County [NJ] | 1,240 | 407 | 279 | 160 |
| San Mateo County [CA] | 1,210 | 265 | 267 | 118 |
| Hillsborough County [FL] | 1,135 | 329 | 111 | 86 |
| Sacramento County [CA] | 1,118 | 268 | 259 | 117 |
| Passaic County [NJ] | 1,088 | 330 | 262 | 129 |
| Baltimore city [MD] | 1,079 | 239 | 466 | 195 |
| Essex County [NJ] | 1,009 | 300 | 288 | 129 |
| Will County [IL] | 998 | 265 | 245 | 119 |
| Anne Arundel County [MD] | 982 | 388 | 136 | 94 |
| Atlantic County [NJ] | 972 | 352 | 247 | 112 |
| Bucks County [PA] | 910 | 282 | 183 | 80 |
| Hampden County [MA] | 904 | 230 | 288 | 142 |
| Bristol County [MA] | 903 | 315 | 291 | 153 |
| Plymouth County [MA] | 884 | 296 | 279 | 153 |
| Camden County [NJ] | 875 | 256 | 294 | 116 |
| Monroe County [NY] | 865 | 287 | 224 | 110 |
| Montgomery County [PA] | 857 | 213 | 239 | 89 |
| New Castle County [DE] | 843 | 238 | 101 | 68 |
| Milwaukee County [WI] | 839 | 256 | 321 | 155 |
| Salt Lake County [UT] | 833 | 221 | 159 | 71 |
| Erie County [NY] | 799 | 274 | 104 | 58 |
| Burlington County [NJ] | 780 | 305 | 170 | 89 |
| Chester County [PA] | 772 | 269 | 235 | 142 |
| Union County [NJ] | 770 | 232 | 207 | 97 |
| Hamilton County [OH] | 764 | 240 | 209 | 95 |
| Tarrant County [TX] | 713 | 304 | 64 | 55 |
| Mercer County [NJ] | 690 | 238 | 124 | 63 |
| Franklin County [OH] | 687 | 200 | 129 | 60 |
| Kane County [IL] | 682 | 270 | 181 | 161 |
| Rockland County [NY] | 676 | 230 | 135 | 77 |
| District of Columbia [DC] | 662 | 214 | 48 | 44 |
| Riverside County [CA] | 650 | 189 | 143 | 77 |
| St. Louis County [MO] | 645 | 224 | 155 | 107 |
| Onondaga County [NY] | 627 | 227 | 195 | 117 |
| Contra Costa County [CA] | 624 | 181 | 112 | 67 |
| Henrico County [VA] | 617 | 265 | 269 | 185 |
| Dallas County [TX] | 614 | 210 | 75 | 70 |
| DeKalb County [GA] | 605 | 306 | 103 | 63 |
| Albany County [NY] | 594 | 335 | 126 | 76 |
| Denver County [CO] | 586 | 212 | 287 | 169 |
| Orange County [FL] | 583 | 220 | 11 | 18 |
| Travis County [TX] | 581 | 237 | 114 | 93 |
| Virginia Beach city [VA] | 575 | 165 | 90 | 75 |
| Washtenaw County [MI] | 564 | 239 | 112 | 67 |
| Fulton County [GA] | 535 | 172 | 18 | 25 |
| Cobb County [GA] | 468 | 218 | 116 | 76 |
| Lancaster County [PA] | 463 | 129 | 211 | 101 |
| Arapahoe County [CO] | 459 | 161 | 63 | 47 |
| Pima County [AZ] | 458 | 174 | 84 | 67 |
| Hennepin County [MN] | 454 | 131 | 24 | 24 |
| Collier County [FL] | 433 | 270 | 232 | 228 |
| San Bernardino County [CA] | 432 | 195 | 55 | 41 |
| Orange County [NY] | 432 | 171 | 105 | 63 |
| Wake County [NC] | 418 | 189 | 56 | 71 |
| Lee County [FL] | 417 | 207 | 37 | 38 |
| Fresno County [CA] | 398 | 188 | 60 | 48 |
| Snohomish County [WA] | 398 | 149 | 12 | 21 |
| Somerset County [NJ] | 394 | 169 | 64 | 57 |
| Multnomah County [OR] | 380 | 152 | 132 | 78 |
| Bexar County [TX] | 356 | 142 | 70 | 49 |
| Solano County [CA] | 351 | 167 | 71 | 44 |
| Howard County [MD] | 321 | 152 | 40 | 36 |
| Arlington County [VA] | 317 | 143 | 80 | 67 |
| Washoe County [NV] | 305 | 150 | 38 | 35 |
| Fort Bend County [TX] | 297 | 181 | 110 | 97 |
| Prince William County [VA] | 295 | 120 | 90 | 69 |
| Pierce County [WA] | 295 | 203 | 59 | 59 |
| San Joaquin County [CA] | 292 | 136 | 97 | 64 |
| Ventura County [CA] | 279 | 136 | 41 | 39 |
| Prince George s County [MD] | 277 | 190 | 67 | 47 |
| Duval County [FL] | 272 | 137 | 39 | 44 |
| Sonoma County [CA] | 265 | 122 | 13 | 17 |
| Loudoun County [VA] | 259 | 163 | 63 | 69 |
| Santa Barbara County [CA] | 257 | 132 | 30 | 30 |
| Shelby County [TN] | 250 | 128 | 34 | 30 |
| Denton County [TX] | 234 | 128 | 45 | 25 |
| Johnson County [KS] | 212 | 101 | 38 | 41 |
| Stanislaus County [CA] | 209 | 111 | 87 | 60 |
| Monterey County [CA] | 202 | 93 | 32 | 35 |
| Gwinnett County [GA] | 202 | 114 | 42 | 54 |
| Placer County [CA] | 188 | 124 | (B) | - |
| Guilford County [NC] | 184 | 106 | 62 | 55 |
| Marion County [IN] | 178 | 81 | 18 | 22 |
| Jefferson County [KY] | 178 | 100 | 44 | 56 |
| Dane County [WI] | 160 | 99 | 14 | 22 |
| Bernalillo County [NM] | 151 | 74 | 18 | 21 |
| Collin County [TX] | 149 | 85 | 26 | 30 |
| Ramsey County [MN] | 138 | 106 | 29 | 22 |
| Oklahoma County [OK] | 131 | 86 | (B) | - |
| Dakota County [MN] | 126 | 129 | 4 | 6 |
| El Paso County [CO] | 125 | 85 | 12 | 20 |
| Honolulu County [HI] | 118 | 107 | 85 | 97 |
| Anchorage Municipality [AK] | 95 | 67 | 28 | 31 |
| Jefferson Parish [LA] | 86 | 75 | 16 | 20 |
| Washington County [OR] | 83 | 64 | (B) | - |
| Clark County [WA] | 78 | 61 | 21 | 21 |
| Yolo County [CA] | 76 | 65 | 6 | 10 |
| Kern County [CA] | 65 | 46 | 10 | 16 |
| Maui County [HI] | 45 | 44 | 13 | 21 |
| Polk County [IA] | 34 | 32 | 14 | 21 |
| Davidson County [TN] | 34 | 31 | (B) | - |
| Hawaii County [HI] | 15 | 19 | 3 | 4 |
| 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] | 82,700 | 3,359 | 23,399 | 1,324 |
| Chicago-Naperville-Elgin [IL-IN] | 34,195 | 2,011 | 8,855 | 725 |
| Boston-Cambridge-Newton [MA-NH] | 19,682 | 1,419 | 5,302 | 659 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 10,368 | 918 | 2,718 | 391 |
| Tampa-St. Petersburg-Clearwater [FL] | 9,212 | 965 | 2,574 | 407 |
| Los Angeles-Long Beach-Anaheim [CA] | 8,799 | 758 | 1,761 | 266 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 8,557 | 1,014 | 2,219 | 552 |
| Detroit-Warren-Dearborn [MI] | 5,638 | 691 | 1,457 | 280 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 5,593 | 880 | 1,026 | 338 |
| Baltimore-Columbia-Towson [MD] | 5,185 | 637 | 1,156 | 239 |
| San Francisco-Oakland-Hayward [CA] | 4,971 | 639 | 817 | 190 |
| Bridgeport-Stamford-Norwalk [CT] | 4,054 | 533 | 892 | 190 |
| Pittsburgh [PA] | 3,014 | 493 | 773 | 198 |
| Cleveland-Elyria [OH] | 2,981 | 553 | 698 | 186 |
| Houston-The Woodlands-Sugar Land [TX] | 2,950 | 486 | 651 | 162 |
| Providence-Warwick [RI-MA] | 2,879 | 504 | 641 | 193 |
| Worcester [MA-CT] | 2,673 | 481 | 873 | 238 |
| Seattle-Tacoma-Bellevue [WA] | 2,292 | 528 | 548 | 202 |
| Charlotte-Concord-Gastonia [NC-SC] | 2,286 | 475 | 549 | 168 |
| Phoenix-Mesa-Scottsdale [AZ] | 2,221 | 424 | 449 | 174 |
| Hartford-West Hartford-East Hartford [CT] | 2,125 | 347 | 557 | 159 |
| Atlanta-Sandy Springs-Roswell [GA] | 2,047 | 446 | 342 | 120 |
| Las Vegas-Henderson-Paradise [NV] | 1,881 | 379 | 377 | 134 |
| San Diego-Carlsbad [CA] | 1,803 | 386 | 297 | 133 |
| Dallas-Fort Worth-Arlington [TX] | 1,796 | 398 | 246 | 114 |
| San Jose-Sunnyvale-Santa Clara [CA] | 1,781 | 465 | 497 | 179 |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 1,766 | 385 | 364 | 145 |
| Denver-Aurora-Lakewood [CO] | 1,515 | 359 | 374 | 181 |
| Manchester-Nashua [NH] | 1,441 | 339 | 410 | 163 |
| Milwaukee-Waukesha-West Allis [WI] | 1,422 | 335 | 394 | 165 |
| Sacramento-Roseville-Arden-Arcade [CA] | 1,412 | 290 | 272 | 114 |
| New Haven-Milford [CT] | 1,265 | 299 | 266 | 132 |
| Columbus [OH] | 1,164 | 281 | 219 | 93 |
| St. Louis [MO-IL] | 1,156 | 290 | 304 | 133 |
| Allentown-Bethlehem-Easton [PA-NJ] | 1,119 | 295 | 223 | 107 |
| Riverside-San Bernardino-Ontario [CA] | 1,082 | 283 | 198 | 80 |
| Albany-Schenectady-Troy [NY] | 1,065 | 378 | 325 | 131 |
| Cincinnati [OH-KY-IN] | 973 | 247 | 239 | 102 |
| Rochester [NY] | 973 | 296 | 314 | 132 |
| Atlantic City-Hammonton [NJ] | 972 | 352 | 247 | 112 |
| Springfield [MA] | 959 | 230 | 323 | 144 |
| Orlando-Kissimmee-Sanford [FL] | 940 | 263 | 95 | 67 |
| Richmond [VA] | 915 | 304 | 359 | 198 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 901 | 239 | 70 | 41 |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 892 | 295 | 121 | 61 |
| Salt Lake City [UT] | 867 | 226 | 171 | 75 |
| Harrisburg-Carlisle [PA] | 752 | 241 | 236 | 98 |
| Austin-Round Rock [TX] | 691 | 245 | 136 | 104 |
| Trenton [NJ] | 690 | 238 | 124 | 63 |
| Syracuse [NY] | 685 | 236 | 211 | 121 |
| Deltona-Daytona Beach-Ormond Beach [FL] | 639 | 257 | 79 | 49 |
| Portland-Vancouver-Hillsboro [OR-WA] | 621 | 207 | 170 | 84 |
| Indianapolis-Carmel-Anderson [IN] | 612 | 174 | 160 | 106 |
| Ann Arbor [MI] | 564 | 239 | 112 | 67 |
| Akron [OH] | 554 | 178 | 144 | 79 |
| Raleigh [NC] | 476 | 212 | 56 | 71 |
| Lancaster [PA] | 463 | 129 | 211 | 101 |
| Tucson [AZ] | 458 | 174 | 84 | 67 |
| Portland-South Portland [ME] | 456 | 169 | 74 | 58 |
| New York-Newark-Jersey City [NY-NJ-PA] | 448 | 179 | 40 | 34 |
| Naples-Immokalee-Marco Island [FL] | 433 | 270 | 232 | 228 |
| Cape Coral-Fort Myers [FL] | 417 | 207 | 37 | 38 |
| Jacksonville [FL] | 409 | 163 | 65 | 52 |
| Kansas City [MO-KS] | 406 | 128 | 76 | 57 |
| San Antonio-New Braunfels [TX] | 406 | 145 | 84 | 54 |
| Lansing-East Lansing [MI] | 403 | 221 | 112 | 159 |
| Fresno [CA] | 398 | 188 | 60 | 48 |
| Vallejo-Fairfield [CA] | 351 | 167 | 71 | 44 |
| New Orleans-Metairie [LA] | 339 | 137 | 74 | 48 |
| Tulsa [OK] | 335 | 196 | 52 | 43 |
| Dayton [OH] | 328 | 101 | 72 | 58 |
| Reno [NV] | 305 | 150 | 38 | 35 |
| Stockton-Lodi [CA] | 292 | 136 | 97 | 64 |
| Oxnard-Thousand Oaks-Ventura [CA] | 279 | 136 | 41 | 39 |
| Memphis [TN-MS-AR] | 266 | 129 | 43 | 34 |
| Santa Rosa [CA] | 265 | 122 | 13 | 17 |
| Louisville Jefferson County [KY] | 257 | 145 | 44 | 56 |
| Santa Maria-Santa Barbara [CA] | 257 | 132 | 30 | 30 |
| Durham-Chapel Hill [NC] | 248 | 143 | 67 | 68 |
| Greensboro-High Point [NC] | 214 | 110 | 62 | 55 |
| Oklahoma City [OK] | 213 | 101 | (B) | - |
| Modesto [CA] | 209 | 111 | 87 | 60 |
| Salinas [CA] | 202 | 93 | 32 | 35 |
| Grand Rapids-Wyoming [MI] | 188 | 105 | 83 | 78 |
| Albuquerque [NM] | 181 | 86 | 18 | 21 |
| Omaha-Council Bluffs [NE-IA] | 176 | 79 | 82 | 68 |
| Madison [WI] | 160 | 99 | 14 | 22 |
| Colorado Springs [CO] | 125 | 85 | 12 | 20 |
| Urban Honolulu [HI] | 118 | 107 | 85 | 97 |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 103 | 62 | (B) | - |
| Anchorage [AK] | 101 | 69 | 31 | 33 |
| Des Moines-West Des Moines [IA] | 87 | 58 | 14 | 21 |
| Bakersfield [CA] | 65 | 46 | 10 | 16 |
| Baton Rouge [LA] | 65 | 55 | 14 | 21 |
| Kahului-Wailuku-Lahaina [HI] | 45 | 44 | 13 | 21 |
| Spokane-Spokane Valley [WA] | 35 | 30 | (B) | - |
| Hilo [HI] | 15 | 19 | 3 | 4 |