| Country | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| United States | 391,113 | 7,265 | 144,876 | 3,812 |
| State | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| California | 191,138 | 5,789 | 73,557 | 2,896 |
| New York | 26,545 | 1,836 | 10,666 | 1,031 |
| Texas | 26,231 | 1,864 | 10,405 | 1,156 |
| Virginia | 24,470 | 1,923 | 8,174 | 722 |
| Maryland | 13,898 | 1,143 | 4,794 | 584 |
| Florida | 9,435 | 1,093 | 2,928 | 533 |
| Georgia | 9,228 | 1,321 | 3,637 | 759 |
| New Jersey | 8,944 | 1,163 | 2,822 | 447 |
| Washington | 8,599 | 1,029 | 3,250 | 546 |
| Illinois | 6,628 | 872 | 1,971 | 414 |
| Massachusetts | 6,453 | 1,035 | 2,281 | 581 |
| Arizona | 6,111 | 1,063 | 2,051 | 553 |
| Pennsylvania | 4,554 | 698 | 1,366 | 294 |
| Nevada | 4,187 | 785 | 1,485 | 396 |
| North Carolina | 4,150 | 762 | 1,502 | 386 |
| Colorado | 4,090 | 650 | 1,237 | 283 |
| Oregon | 3,375 | 655 | 1,231 | 328 |
| Ohio | 3,266 | 551 | 1,152 | 315 |
| Missouri | 3,068 | 549 | 1,039 | 282 |
| Tennessee | 2,935 | 684 | 1,109 | 463 |
| Michigan | 2,644 | 446 | 813 | 225 |
| Oklahoma | 2,148 | 372 | 819 | 201 |
| Minnesota | 1,653 | 367 | 550 | 223 |
| Connecticut | 1,488 | 293 | 441 | 144 |
| Kansas | 1,485 | 441 | 472 | 192 |
| Indiana | 1,480 | 314 | 423 | 169 |
| Louisiana | 1,454 | 397 | 378 | 173 |
| Utah | 1,310 | 369 | 539 | 198 |
| New Mexico | 1,086 | 385 | 319 | 121 |
| Kentucky | 1,021 | 340 | 377 | 134 |
| Alabama | 1,010 | 320 | 412 | 187 |
| Wisconsin | 870 | 215 | 286 | 106 |
| South Carolina | 762 | 295 | 387 | 168 |
| District of Columbia | 663 | 193 | 107 | 74 |
| Nebraska | 640 | 321 | 404 | 296 |
| Maine | 572 | 267 | 234 | 134 |
| Arkansas | 519 | 273 | 252 | 191 |
| Idaho | 484 | 343 | 283 | 273 |
| Hawaii | 476 | 212 | 99 | 75 |
| West Virginia | 356 | 179 | 69 | 71 |
| Iowa | 327 | 130 | 107 | 82 |
| Rhode Island | 326 | 232 | 81 | 52 |
| Delaware | 262 | 150 | 123 | 95 |
| New Hampshire | 205 | 113 | 86 | 74 |
| Mississippi | 174 | 105 | 39 | 39 |
| Wyoming | 126 | 87 | 35 | 33 |
| Alaska | 100 | 75 | 23 | 32 |
| Vermont | 75 | 44 | 9 | 16 |
| North Dakota | 46 | 37 | 35 | 34 |
| Montana | 29 | 41 | (B) | - |
| South Dakota | 17 | 25 | 17 | 25 |
| Puerto Rico | 14 | 16 | (B) | - |
| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Los Angeles County [CA] | 72,908 | 3,202 | 30,171 | 1,561 |
| Orange County [CA] | 30,840 | 2,361 | 10,880 | 1,032 |
| Santa Clara County [CA] | 14,446 | 1,176 | 5,244 | 598 |
| San Diego County [CA] | 14,034 | 1,474 | 5,788 | 760 |
| Fairfax County [VA] | 11,710 | 1,159 | 3,866 | 566 |
| Alameda County [CA] | 11,431 | 1,294 | 4,594 | 645 |
| Nassau County [NY] | 10,172 | 1,180 | 4,561 | 803 |
| Contra Costa County [CA] | 9,688 | 1,464 | 3,781 | 768 |
| Montgomery County [MD] | 9,423 | 1,106 | 3,356 | 516 |
| Harris County [TX] | 6,834 | 1,081 | 3,067 | 579 |
| Queens County [NY] | 5,935 | 1,131 | 2,905 | 664 |
| Collin County [TX] | 5,890 | 956 | 2,349 | 548 |
| Sacramento County [CA] | 5,663 | 906 | 1,994 | 374 |
| King County [WA] | 5,657 | 807 | 2,186 | 433 |
| Maricopa County [AZ] | 4,953 | 969 | 1,852 | 527 |
| Loudoun County [VA] | 4,821 | 835 | 1,650 | 340 |
| Riverside County [CA] | 4,085 | 755 | 1,566 | 352 |
| Clark County [NV] | 3,850 | 751 | 1,406 | 378 |
| Ventura County [CA] | 3,717 | 718 | 1,492 | 368 |
| San Mateo County [CA] | 3,516 | 708 | 1,149 | 305 |
| Cook County [IL] | 3,342 | 699 | 1,107 | 310 |
| New York County [NY] | 2,747 | 631 | 645 | 284 |
| Fulton County [GA] | 2,739 | 555 | 1,147 | 351 |
| San Bernardino County [CA] | 2,730 | 638 | 843 | 278 |
| San Joaquin County [CA] | 2,712 | 890 | 859 | 364 |
| Middlesex County [MA] | 2,572 | 694 | 585 | 180 |
| Bergen County [NJ] | 2,538 | 775 | 699 | 226 |
| Prince William County [VA] | 2,462 | 749 | 817 | 250 |
| San Francisco County [CA] | 2,459 | 628 | 443 | 173 |
| Tarrant County [TX] | 2,226 | 594 | 789 | 273 |
| Fort Bend County [TX] | 1,989 | 1,060 | 627 | 325 |
| Dallas County [TX] | 1,911 | 472 | 566 | 196 |
| Suffolk County [NY] | 1,813 | 724 | 534 | 226 |
| Kings County [NY] | 1,807 | 376 | 849 | 218 |
| Placer County [CA] | 1,795 | 567 | 489 | 188 |
| Cobb County [GA] | 1,783 | 474 | 559 | 207 |
| Wake County [NC] | 1,564 | 585 | 570 | 285 |
| Davidson County [TN] | 1,539 | 618 | 714 | 463 |
| Gwinnett County [GA] | 1,507 | 555 | 682 | 284 |
| Baltimore County [MD] | 1,501 | 375 | 699 | 240 |
| Washington County [OR] | 1,499 | 484 | 656 | 292 |
| Bexar County [TX] | 1,486 | 592 | 704 | 415 |
| Miami-Dade County [FL] | 1,359 | 493 | 364 | 143 |
| Denton County [TX] | 1,335 | 492 | 598 | 329 |
| Travis County [TX] | 1,281 | 305 | 455 | 159 |
| Stanislaus County [CA] | 1,245 | 498 | 853 | 419 |
| St. Louis County [MO] | 1,227 | 419 | 339 | 149 |
| Worcester County [MA] | 1,208 | 563 | 732 | 472 |
| Palm Beach County [FL] | 1,207 | 422 | 352 | 196 |
| Howard County [MD] | 1,178 | 369 | 282 | 117 |
| Snohomish County [WA] | 1,163 | 347 | 538 | 218 |
| Norfolk County [MA] | 1,133 | 362 | 293 | 126 |
| Broward County [FL] | 1,132 | 431 | 371 | 191 |
| Morris County [NJ] | 1,100 | 381 | 300 | 139 |
| DuPage County [IL] | 1,097 | 399 | 375 | 178 |
| Hillsborough County [FL] | 1,096 | 338 | 374 | 174 |
| Duval County [FL] | 1,073 | 426 | 329 | 166 |
| Fresno County [CA] | 1,069 | 393 | 315 | 151 |
| Arapahoe County [CO] | 1,063 | 381 | 301 | 177 |
| Salt Lake County [UT] | 1,050 | 368 | 446 | 191 |
| Pima County [AZ] | 986 | 381 | 182 | 96 |
| Hennepin County [MN] | 986 | 269 | 242 | 108 |
| Johnson County [KS] | 927 | 387 | 239 | 145 |
| Bernalillo County [NM] | 923 | 372 | 280 | 112 |
| Oakland County [MI] | 882 | 298 | 297 | 134 |
| Oklahoma County [OK] | 864 | 258 | 252 | 96 |
| Middlesex County [NJ] | 853 | 250 | 320 | 142 |
| Essex County [NJ] | 852 | 386 | 178 | 113 |
| Santa Barbara County [CA] | 837 | 262 | 238 | 141 |
| Orange County [FL] | 794 | 244 | 274 | 156 |
| Delaware County [PA] | 781 | 332 | 219 | 101 |
| DeKalb County [GA] | 774 | 320 | 336 | 242 |
| Cuyahoga County [OH] | 773 | 308 | 316 | 198 |
| Yolo County [CA] | 751 | 298 | 200 | 117 |
| Montgomery County [PA] | 741 | 228 | 155 | 74 |
| Solano County [CA] | 736 | 287 | 249 | 118 |
| Sonoma County [CA] | 727 | 353 | 237 | 145 |
| Denver County [CO] | 726 | 326 | 197 | 118 |
| Mecklenburg County [NC] | 706 | 247 | 221 | 132 |
| Franklin County [OH] | 704 | 240 | 254 | 131 |
| Arlington County [VA] | 698 | 208 | 169 | 95 |
| Allegheny County [PA] | 697 | 255 | 181 | 99 |
| Westchester County [NY] | 675 | 340 | 81 | 82 |
| Somerset County [NJ] | 668 | 398 | 152 | 93 |
| District of Columbia [DC] | 663 | 193 | 107 | 74 |
| Philadelphia County [PA] | 598 | 242 | 128 | 83 |
| Multnomah County [OR] | 584 | 237 | 167 | 86 |
| Fairfield County [CT] | 542 | 184 | 156 | 88 |
| Lake County [IL] | 530 | 211 | 141 | 90 |
| Baltimore city [MD] | 507 | 165 | 160 | 90 |
| Suffolk County [MA] | 499 | 181 | 176 | 105 |
| Kern County [CA] | 484 | 216 | 106 | 121 |
| Erie County [NY] | 474 | 289 | 191 | 177 |
| Passaic County [NJ] | 470 | 227 | 236 | 146 |
| Monmouth County [NJ] | 466 | 208 | 170 | 105 |
| Hudson County [NJ] | 443 | 247 | 193 | 140 |
| Jefferson County [KY] | 441 | 209 | 155 | 91 |
| New Haven County [CT] | 440 | 176 | 161 | 96 |
| Monroe County [NY] | 437 | 312 | 31 | 28 |
| Wayne County [MI] | 419 | 158 | 146 | 101 |
| Clark County [WA] | 405 | 245 | 37 | 31 |
| Marion County [IN] | 404 | 183 | 121 | 80 |
| Essex County [MA] | 382 | 187 | 171 | 138 |
| Washtenaw County [MI] | 371 | 150 | 105 | 72 |
| Will County [IL] | 362 | 227 | 59 | 50 |
| Hartford County [CT] | 357 | 141 | 78 | 48 |
| Honolulu County [HI] | 347 | 215 | 49 | 44 |
| Hampden County [MA] | 346 | 231 | 182 | 157 |
| Dane County [WI] | 339 | 121 | 84 | 48 |
| Pierce County [WA] | 335 | 165 | 87 | 81 |
| Guilford County [NC] | 333 | 211 | 96 | 120 |
| Jefferson Parish [LA] | 329 | 233 | 14 | 21 |
| Atlantic County [NJ] | 317 | 224 | 127 | 90 |
| Bronx County [NY] | 311 | 139 | 148 | 98 |
| Monterey County [CA] | 309 | 144 | 93 | 57 |
| Washoe County [NV] | 300 | 144 | 79 | 62 |
| Virginia Beach city [VA] | 286 | 171 | 101 | 74 |
| Chester County [PA] | 278 | 162 | 154 | 131 |
| Mercer County [NJ] | 271 | 130 | 81 | 59 |
| Prince George s County [MD] | 258 | 115 | 75 | 53 |
| Bucks County [PA] | 256 | 148 | 88 | 71 |
| Camden County [NJ] | 252 | 188 | 71 | 66 |
| Shelby County [TN] | 245 | 155 | 76 | 57 |
| Milwaukee County [WI] | 235 | 115 | 110 | 74 |
| Anne Arundel County [MD] | 230 | 110 | 2 | 5 |
| Pinellas County [FL] | 228 | 119 | 97 | 67 |
| Henrico County [VA] | 225 | 187 | 58 | 66 |
| Onondaga County [NY] | 217 | 107 | 115 | 84 |
| Union County [NJ] | 216 | 184 | 52 | 54 |
| Hamilton County [OH] | 210 | 140 | 110 | 93 |
| Ramsey County [MN] | 206 | 94 | 114 | 74 |
| New Castle County [DE] | 194 | 129 | 98 | 87 |
| Kane County [IL] | 190 | 125 | (B) | - |
| Collier County [FL] | 149 | 163 | 95 | 120 |
| Rockland County [NY] | 149 | 82 | 49 | 38 |
| El Paso County [CO] | 148 | 118 | 29 | 37 |
| Albany County [NY] | 148 | 88 | 38 | 43 |
| Richmond County [NY] | 141 | 93 | 30 | 43 |
| Burlington County [NJ] | 128 | 92 | 67 | 67 |
| Hillsborough County [NH] | 113 | 91 | 69 | 70 |
| Orange County [NY] | 90 | 94 | 24 | 38 |
| Providence County [RI] | 90 | 79 | 39 | 36 |
| Dakota County [MN] | 82 | 84 | 41 | 51 |
| Lee County [FL] | 73 | 61 | 39 | 52 |
| Bristol County [MA] | 71 | 62 | 33 | 38 |
| Macomb County [MI] | 69 | 74 | (B) | - |
| Anchorage Municipality [AK] | 68 | 65 | 19 | 31 |
| Plymouth County [MA] | 67 | 59 | (B) | - |
| Maui County [HI] | 66 | 49 | (B) | - |
| Hawaii County [HI] | 50 | 79 | 50 | 79 |
| Polk County [IA] | 48 | 44 | (B) | - |
| Lancaster County [PA] | 48 | 54 | (B) | - |
| Ocean County [NJ] | 27 | 38 | 14 | 22 |
| Navajo County [AZ] | 2 | 5 | (B) | - |
| City / Metropolitan area / CBSA | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Los Angeles-Long Beach-Anaheim [CA] | 103,748 | 4,130 | 41,051 | 1,886 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 32,302 | 2,317 | 10,874 | 875 |
| New York-Newark-Jersey City [NY] | 31,740 | 2,112 | 12,226 | 1,050 |
| San Francisco-Oakland-Hayward [CA] | 28,645 | 2,281 | 10,565 | 1,125 |
| San Jose-Sunnyvale-Santa Clara [CA] | 14,462 | 1,174 | 5,253 | 597 |
| San Diego-Carlsbad [CA] | 14,034 | 1,474 | 5,788 | 760 |
| Dallas-Fort Worth-Arlington [TX] | 11,468 | 1,394 | 4,321 | 746 |
| Houston-The Woodlands-Sugar Land [TX] | 9,327 | 1,423 | 3,816 | 622 |
| Sacramento-Roseville-Arden-Arcade [CA] | 9,095 | 1,163 | 3,069 | 476 |
| Atlanta-Sandy Springs-Roswell [GA] | 8,155 | 1,194 | 3,105 | 602 |
| Seattle-Tacoma-Bellevue [WA] | 7,155 | 954 | 2,811 | 520 |
| Riverside-San Bernardino-Ontario [CA] | 6,815 | 955 | 2,409 | 435 |
| Chicago-Naperville-Elgin [IL-IN] | 5,760 | 874 | 1,753 | 380 |
| Phoenix-Mesa-Scottsdale [AZ] | 5,008 | 992 | 1,862 | 530 |
| Boston-Cambridge-Newton [MA-NH] | 4,723 | 853 | 1,234 | 281 |
| Las Vegas-Henderson-Paradise [NV] | 3,850 | 751 | 1,406 | 378 |
| Oxnard-Thousand Oaks-Ventura [CA] | 3,717 | 718 | 1,492 | 368 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 3,698 | 752 | 1,087 | 318 |
| Baltimore-Columbia-Towson [MD] | 3,613 | 591 | 1,201 | 282 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 3,371 | 583 | 1,065 | 265 |
| Denver-Aurora-Lakewood [CO] | 3,223 | 670 | 993 | 276 |
| Portland-Vancouver-Hillsboro [OR-WA] | 3,054 | 643 | 1,091 | 338 |
| Stockton-Lodi [CA] | 2,712 | 890 | 859 | 364 |
| St. Louis [MO-IL] | 2,325 | 508 | 844 | 256 |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 2,201 | 649 | 907 | 461 |
| Austin-Round Rock [TX] | 1,947 | 379 | 893 | 283 |
| Raleigh [NC] | 1,567 | 585 | 570 | 285 |
| San Antonio-New Braunfels [TX] | 1,530 | 598 | 718 | 415 |
| Tampa-St. Petersburg-Clearwater [FL] | 1,522 | 404 | 498 | 201 |
| Orlando-Kissimmee-Sanford [FL] | 1,514 | 392 | 491 | 194 |
| Kansas City [MO-KS] | 1,478 | 446 | 361 | 181 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 1,459 | 323 | 430 | 153 |
| Detroit-Warren-Dearborn [MI] | 1,401 | 335 | 443 | 173 |
| Oklahoma City [OK] | 1,339 | 289 | 429 | 153 |
| Modesto [CA] | 1,245 | 498 | 853 | 419 |
| Worcester [MA-CT] | 1,225 | 563 | 732 | 472 |
| Jacksonville [FL] | 1,121 | 422 | 357 | 162 |
| Fresno [CA] | 1,069 | 393 | 315 | 151 |
| Salt Lake City [UT] | 1,050 | 368 | 446 | 191 |
| Tucson [AZ] | 986 | 381 | 182 | 96 |
| Cleveland-Elyria [OH] | 958 | 327 | 383 | 198 |
| Albuquerque [NM] | 956 | 375 | 282 | 112 |
| Columbus [OH] | 952 | 278 | 279 | 132 |
| Charlotte-Concord-Gastonia [NC-SC] | 871 | 303 | 280 | 147 |
| Indianapolis-Carmel-Anderson [IN] | 860 | 270 | 274 | 136 |
| Santa Maria-Santa Barbara [CA] | 837 | 262 | 238 | 141 |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 808 | 256 | 279 | 128 |
| Pittsburgh [PA] | 782 | 260 | 203 | 106 |
| Richmond [VA] | 740 | 266 | 232 | 137 |
| Vallejo-Fairfield [CA] | 736 | 287 | 249 | 118 |
| Santa Rosa [CA] | 727 | 353 | 237 | 145 |
| Portland-South Portland [ME] | 562 | 269 | 231 | 134 |
| Durham-Chapel Hill [NC] | 560 | 242 | 249 | 171 |
| Bridgeport-Stamford-Norwalk [CT] | 542 | 184 | 156 | 88 |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 542 | 295 | 202 | 177 |
| Cincinnati [OH-KY-IN] | 528 | 228 | 243 | 127 |
| New Orleans-Metairie [LA] | 509 | 258 | 102 | 77 |
| Rochester [NY] | 507 | 292 | 35 | 29 |
| Tulsa [OK] | 500 | 177 | 264 | 137 |
| Bakersfield [CA] | 484 | 216 | 106 | 121 |
| Albany-Schenectady-Troy [NY] | 468 | 196 | 217 | 111 |
| Omaha-Council Bluffs [NE-IA] | 464 | 306 | 315 | 292 |
| Hartford-West Hartford-East Hartford [CT] | 455 | 140 | 101 | 56 |
| Springfield [MA] | 453 | 239 | 254 | 165 |
| Louisville Jefferson County [KY] | 444 | 208 | 158 | 91 |
| New Haven-Milford [CT] | 440 | 176 | 161 | 96 |
| Providence-Warwick [RI-MA] | 397 | 255 | 114 | 68 |
| Ann Arbor [MI] | 371 | 150 | 105 | 72 |
| Milwaukee-Waukesha-West Allis [WI] | 362 | 153 | 178 | 96 |
| Baton Rouge [LA] | 356 | 180 | 100 | 92 |
| Urban Honolulu [HI] | 347 | 215 | 49 | 44 |
| Madison [WI] | 345 | 121 | 90 | 48 |
| Greensboro-High Point [NC] | 344 | 211 | 107 | 122 |
| Atlantic City-Hammonton [NJ] | 317 | 224 | 127 | 90 |
| Grand Rapids-Wyoming [MI] | 315 | 165 | 129 | 85 |
| Salinas [CA] | 309 | 144 | 93 | 57 |
| Reno [NV] | 300 | 144 | 79 | 62 |
| Memphis [TN-MS-AR] | 285 | 167 | 83 | 59 |
| Trenton [NJ] | 271 | 130 | 81 | 59 |
| Lansing-East Lansing [MI] | 254 | 125 | 53 | 45 |
| Allentown-Bethlehem-Easton [PA-NJ] | 250 | 136 | 99 | 66 |
| Syracuse [NY] | 247 | 111 | 137 | 87 |
| Spokane-Spokane Valley [WA] | 243 | 208 | 155 | 185 |
| Dayton [OH] | 224 | 134 | 91 | 72 |
| Akron [OH] | 212 | 143 | 65 | 74 |
| Lafayette [LA] | 177 | 160 | 100 | 117 |
| Naples-Immokalee-Marco Island [FL] | 149 | 163 | 95 | 120 |
| Colorado Springs [CO] | 148 | 118 | 29 | 37 |
| Harrisburg-Carlisle [PA] | 142 | 134 | 72 | 85 |
| Deltona-Daytona Beach-Ormond Beach [FL] | 125 | 100 | 20 | 28 |
| Manchester-Nashua [NH] | 113 | 91 | 69 | 70 |
| New York-Newark-Jersey City [NY-NJ-PA] | 93 | 62 | 36 | 55 |
| Des Moines-West Des Moines [IA] | 76 | 58 | 28 | 47 |
| Cape Coral-Fort Myers [FL] | 73 | 61 | 39 | 52 |
| Anchorage [AK] | 68 | 65 | 19 | 31 |
| Kahului-Wailuku-Lahaina [HI] | 66 | 49 | (B) | - |
| Hilo [HI] | 50 | 79 | 50 | 79 |
| Lancaster [PA] | 48 | 54 | (B) | - |
| Show Low [AZ] | 2 | 5 | (B) | - |