| Country | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| United States | 190,685 | 4,415 | 33,885 | 1,935 |
| State | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| California | 39,655 | 2,128 | 6,125 | 738 |
| New Jersey | 19,835 | 1,623 | 3,605 | 729 |
| Texas | 16,960 | 1,621 | 3,260 | 677 |
| Illinois | 10,265 | 1,192 | 1,975 | 402 |
| New York | 8,695 | 1,039 | 1,800 | 463 |
| Virginia | 7,990 | 1,125 | 960 | 226 |
| Massachusetts | 7,630 | 1,013 | 1,075 | 332 |
| Michigan | 6,440 | 892 | 1,100 | 317 |
| Georgia | 6,350 | 914 | 1,330 | 479 |
| Washington | 6,350 | 782 | 1,030 | 317 |
| Pennsylvania | 6,250 | 613 | 1,295 | 340 |
| Ohio | 6,210 | 900 | 1,115 | 356 |
| Maryland | 6,135 | 707 | 995 | 256 |
| Florida | 5,395 | 918 | 895 | 352 |
| North Carolina | 4,900 | 796 | 980 | 331 |
| Connecticut | 3,745 | 698 | 925 | 324 |
| Minnesota | 3,585 | 656 | 870 | 373 |
| Arizona | 3,205 | 562 | 515 | 181 |
| Missouri | 2,305 | 689 | 705 | 350 |
| Colorado | 1,920 | 512 | 125 | 85 |
| Wisconsin | 1,910 | 457 | 295 | 154 |
| Indiana | 1,780 | 465 | 205 | 105 |
| Oregon | 1,680 | 441 | 190 | 115 |
| Tennessee | 1,165 | 332 | 270 | 134 |
| Delaware | 1,115 | 338 | 205 | 96 |
| Kansas | 1,080 | 326 | 145 | 78 |
| Iowa | 890 | 311 | 195 | 120 |
| Nebraska | 770 | 235 | 175 | 112 |
| Kentucky | 760 | 243 | 100 | 68 |
| Alabama | 665 | 271 | 195 | 117 |
| Utah | 565 | 244 | 145 | 159 |
| New Hampshire | 560 | 292 | 65 | 66 |
| Arkansas | 550 | 222 | 180 | 94 |
| South Carolina | 550 | 232 | 150 | 112 |
| Rhode Island | 475 | 256 | 245 | 211 |
| Oklahoma | 450 | 145 | 60 | 48 |
| Nevada | 320 | 188 | 130 | 96 |
| Louisiana | 315 | 137 | (D) | (D) |
| District of Columbia | 185 | 124 | 15 | 16 |
| Idaho | 180 | 133 | 75 | 105 |
| New Mexico | 180 | 126 | (B) | - |
| South Dakota | 170 | 100 | 55 | 55 |
| Mississippi | 130 | 98 | (D) | (D) |
| West Virginia | 95 | 100 | (B) | - |
| Maine | 75 | 62 | 40 | 35 |
| Wyoming | 70 | 71 | (D) | (D) |
| North Dakota | 55 | 58 | (B) | - |
| Alaska | 35 | 44 | (B) | - |
| Vermont | 35 | 38 | (D) | (D) |
| Hawaii | 30 | 34 | (B) | - |
| Montana | (D) | (D) | (B) | - |
| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Santa Clara County [CA] | 15,540 | 1,177 | 1,885 | 345 |
| Middlesex County [NJ] | 8,275 | 1,018 | 1,895 | 620 |
| Alameda County [CA] | 6,800 | 849 | 985 | 364 |
| King County [WA] | 5,020 | 739 | 765 | 299 |
| Los Angeles County [CA] | 4,875 | 849 | 920 | 260 |
| Cook County [IL] | 4,220 | 672 | 850 | 273 |
| Middlesex County [MA] | 3,820 | 727 | 545 | 233 |
| Oakland County [MI] | 3,225 | 738 | 645 | 262 |
| Collin County [TX] | 3,205 | 676 | 430 | 197 |
| Fairfax County [VA] | 3,140 | 734 | 155 | 102 |
| Maricopa County [AZ] | 3,060 | 550 | 485 | 178 |
| Harris County [TX] | 2,830 | 629 | 690 | 380 |
| Orange County [CA] | 2,760 | 684 | 425 | 202 |
| Fulton County [GA] | 2,490 | 670 | 435 | 310 |
| Montgomery County [MD] | 2,490 | 468 | 290 | 142 |
| Dallas County [TX] | 2,430 | 584 | 745 | 374 |
| Contra Costa County [CA] | 2,235 | 566 | 655 | 289 |
| Wake County [NC] | 2,200 | 586 | 300 | 130 |
| Hennepin County [MN] | 2,175 | 502 | 735 | 363 |
| Hudson County [NJ] | 2,055 | 422 | 335 | 140 |
| Loudoun County [VA] | 2,005 | 466 | 275 | 126 |
| Queens County [NY] | 1,955 | 502 | 440 | 176 |
| San Diego County [CA] | 1,920 | 442 | 485 | 205 |
| Mercer County [NJ] | 1,900 | 664 | 195 | 122 |
| Somerset County [NJ] | 1,830 | 398 | 145 | 93 |
| DuPage County [IL] | 1,810 | 479 | 325 | 161 |
| Franklin County [OH] | 1,755 | 531 | 490 | 252 |
| Travis County [TX] | 1,750 | 478 | 245 | 148 |
| Bergen County [NJ] | 1,735 | 536 | 175 | 150 |
| Nassau County [NY] | 1,710 | 788 | 625 | 447 |
| Hartford County [CT] | 1,490 | 362 | 400 | 216 |
| Worcester County [MA] | 1,480 | 394 | 275 | 171 |
| St. Louis County [MO] | 1,360 | 443 | 475 | 283 |
| Cobb County [GA] | 1,355 | 419 | 500 | 301 |
| Fairfield County [CT] | 1,270 | 469 | 265 | 134 |
| Bexar County [TX] | 1,260 | 374 | 260 | 167 |
| Mecklenburg County [NC] | 1,230 | 413 | 255 | 204 |
| Washington County [OR] | 1,225 | 398 | 155 | 109 |
| Norfolk County [MA] | 1,210 | 338 | 155 | 128 |
| Lake County [IL] | 1,205 | 358 | 135 | 78 |
| Denton County [TX] | 1,205 | 347 | 185 | 168 |
| Allegheny County [PA] | 1,190 | 300 | 280 | 160 |
| San Mateo County [CA] | 1,135 | 354 | 215 | 132 |
| Fort Bend County [TX] | 1,125 | 458 | 250 | 160 |
| Chester County [PA] | 1,115 | 389 | 375 | 232 |
| Will County [IL] | 1,105 | 419 | 50 | 51 |
| Montgomery County [PA] | 1,065 | 297 | 195 | 114 |
| New Castle County [DE] | 1,050 | 321 | 190 | 93 |
| Henrico County [VA] | 1,050 | 506 | 235 | 140 |
| Hillsborough County [FL] | 1,045 | 359 | 240 | 126 |
| Howard County [MD] | 990 | 341 | 115 | 71 |
| Morris County [NJ] | 960 | 255 | 115 | 64 |
| Sacramento County [CA] | 905 | 314 | 120 | 113 |
| Prince George s County [MD] | 865 | 303 | 280 | 193 |
| Wayne County [MI] | 860 | 265 | 155 | 117 |
| Johnson County [KS] | 825 | 273 | 110 | 69 |
| Snohomish County [WA] | 805 | 283 | 105 | 88 |
| Baltimore County [MD] | 785 | 347 | 175 | 130 |
| Ventura County [CA] | 760 | 242 | 70 | 65 |
| Duval County [FL] | 755 | 333 | 155 | 132 |
| Tarrant County [TX] | 720 | 312 | (D) | (D) |
| Erie County [NY] | 705 | 276 | 150 | 97 |
| Cuyahoga County [OH] | 675 | 221 | 155 | 119 |
| Gwinnett County [GA] | 650 | 292 | 110 | 90 |
| Union County [NJ] | 630 | 213 | 210 | 162 |
| Dane County [WI] | 610 | 258 | 105 | 81 |
| Broward County [FL] | 605 | 261 | (D) | (D) |
| Macomb County [MI] | 605 | 297 | 45 | 55 |
| Monmouth County [NJ] | 605 | 239 | 55 | 58 |
| Kings County [NY] | 585 | 239 | 160 | 128 |
| New York County [NY] | 580 | 177 | (D) | (D) |
| Shelby County [TN] | 560 | 230 | 125 | 89 |
| New Haven County [CT] | 555 | 246 | 185 | 167 |
| Arapahoe County [CO] | 550 | 314 | 25 | 34 |
| Burlington County [NJ] | 535 | 225 | 90 | 76 |
| Salt Lake County [UT] | 535 | 240 | 145 | 159 |
| Washtenaw County [MI] | 530 | 197 | 65 | 47 |
| Essex County [NJ] | 495 | 279 | 185 | 163 |
| Westchester County [NY] | 495 | 217 | 70 | 77 |
| Hamilton County [OH] | 495 | 168 | 135 | 104 |
| Orange County [FL] | 480 | 309 | (D) | (D) |
| DeKalb County [GA] | 480 | 305 | 135 | 148 |
| San Francisco County [CA] | 470 | 174 | (D) | (D) |
| Delaware County [PA] | 465 | 222 | 35 | 35 |
| Jefferson County [KY] | 460 | 205 | 25 | 26 |
| Suffolk County [NY] | 445 | 205 | 70 | 58 |
| Miami-Dade County [FL] | 440 | 216 | 185 | 130 |
| Monroe County [NY] | 430 | 168 | (D) | (D) |
| Placer County [CA] | 395 | 209 | 50 | 42 |
| Ramsey County [MN] | 385 | 178 | 40 | 33 |
| Palm Beach County [FL] | 375 | 179 | (D) | (D) |
| Philadelphia County [PA] | 365 | 172 | 80 | 83 |
| Camden County [NJ] | 360 | 257 | (D) | (D) |
| Richmond County [NY] | 360 | 176 | 105 | 104 |
| Hillsborough County [NH] | 355 | 200 | (D) | (D) |
| Suffolk County [MA] | 350 | 196 | 70 | 71 |
| Baltimore city [MD] | 325 | 160 | (D) | (D) |
| Anne Arundel County [MD] | 315 | 207 | 55 | 64 |
| Passaic County [NJ] | 305 | 154 | (D) | (D) |
| Davidson County [TN] | 305 | 174 | (D) | (D) |
| Albany County [NY] | 295 | 213 | 45 | 55 |
| Bucks County [PA] | 290 | 144 | (D) | (D) |
| Providence County [RI] | 260 | 223 | 130 | 188 |
| Milwaukee County [WI] | 255 | 144 | 45 | 49 |
| Clark County [NV] | 235 | 146 | 105 | 85 |
| Dakota County [MN] | 230 | 129 | (D) | (D) |
| San Bernardino County [CA] | 220 | 132 | (D) | (D) |
| Essex County [MA] | 220 | 140 | (D) | (D) |
| Pinellas County [FL] | 215 | 192 | (D) | (D) |
| San Joaquin County [CA] | 210 | 167 | (D) | (D) |
| Polk County [IA] | 205 | 169 | 60 | 67 |
| Fresno County [CA] | 200 | 135 | (B) | - |
| Marion County [IN] | 195 | 135 | (D) | (D) |
| Oklahoma County [OK] | 195 | 75 | 40 | 36 |
| Riverside County [CA] | 190 | 116 | 45 | 44 |
| District of Columbia [DC] | 185 | 124 | 15 | 16 |
| Guilford County [NC] | 185 | 151 | (D) | (D) |
| El Paso County [CO] | 180 | 126 | (B) | - |
| Bristol County [MA] | 165 | 118 | (B) | - |
| Prince William County [VA] | 160 | 91 | (B) | - |
| Hampden County [MA] | 145 | 108 | (B) | - |
| Onondaga County [NY] | 145 | 85 | (D) | (D) |
| Denver County [CO] | 130 | 135 | 65 | 82 |
| Kane County [IL] | 130 | 113 | 60 | 76 |
| Monterey County [CA] | 125 | 108 | (D) | (D) |
| Yolo County [CA] | 125 | 85 | (D) | (D) |
| Bronx County [NY] | 125 | 97 | (D) | (D) |
| Bernalillo County [NM] | 120 | 113 | (B) | - |
| Plymouth County [MA] | 115 | 102 | (D) | (D) |
| Rockland County [NY] | 115 | 88 | (D) | (D) |
| Pima County [AZ] | 100 | 78 | 35 | 39 |
| Kern County [CA] | 100 | 99 | (D) | (D) |
| Solano County [CA] | 100 | 100 | (D) | (D) |
| Arlington County [VA] | 100 | 73 | 30 | 33 |
| Virginia Beach city [VA] | 95 | 102 | (B) | - |
| Sonoma County [CA] | 90 | 85 | 25 | 61 |
| Clark County [WA] | 85 | 98 | 45 | 51 |
| Lee County [FL] | 65 | 93 | (B) | - |
| Washoe County [NV] | 65 | 128 | (D) | (D) |
| Multnomah County [OR] | 65 | 53 | (B) | - |
| Lancaster County [PA] | 60 | 55 | (D) | (D) |
| Santa Barbara County [CA] | 40 | 43 | (B) | - |
| Atlantic County [NJ] | 40 | 55 | (D) | (D) |
| Orange County [NY] | 35 | 46 | (B) | - |
| Anchorage Municipality [AK] | 30 | 38 | (B) | - |
| Honolulu County [HI] | 30 | 34 | (B) | - |
| Collier County [FL] | (D) | (D) | (B) | - |
| Jefferson Parish [LA] | (D) | (D) | (B) | - |
| Pierce County [WA] | (D) | (D) | (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] | 23,430 | 1,685 | 4,680 | 780 |
| San Jose-Sunnyvale-Santa Clara [CA] | 15,550 | 1,178 | 1,885 | 345 |
| San Francisco-Oakland-Hayward [CA] | 10,660 | 1,041 | 1,910 | 460 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 9,520 | 1,110 | 1,130 | 269 |
| Chicago-Naperville-Elgin [IL-IN] | 8,735 | 1,057 | 1,425 | 330 |
| Los Angeles-Long Beach-Anaheim [CA] | 7,640 | 1,089 | 1,345 | 329 |
| Dallas-Fort Worth-Arlington [TX] | 7,590 | 945 | 1,435 | 416 |
| Boston-Cambridge-Newton [MA-NH] | 5,915 | 900 | 850 | 290 |
| Seattle-Tacoma-Bellevue [WA] | 5,845 | 788 | 870 | 310 |
| Atlanta-Sandy Springs-Roswell [GA] | 5,665 | 870 | 1,220 | 465 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 5,280 | 688 | 1,165 | 387 |
| Detroit-Warren-Dearborn [MI] | 4,700 | 871 | 850 | 294 |
| Houston-The Woodlands-Sugar Land [TX] | 4,690 | 850 | 1,065 | 402 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 3,295 | 645 | 835 | 368 |
| Phoenix-Mesa-Scottsdale [AZ] | 3,095 | 551 | 485 | 178 |
| Austin-Round Rock [TX] | 2,530 | 603 | 355 | 182 |
| Baltimore-Columbia-Towson [MD] | 2,470 | 578 | 375 | 177 |
| Columbus [OH] | 2,210 | 561 | 550 | 251 |
| Raleigh [NC] | 2,200 | 586 | 300 | 130 |
| St. Louis [MO-IL] | 2,025 | 655 | 600 | 329 |
| San Diego-Carlsbad [CA] | 1,920 | 442 | 485 | 205 |
| Trenton [NJ] | 1,900 | 664 | 195 | 122 |
| Charlotte-Concord-Gastonia [NC-SC] | 1,715 | 454 | 375 | 207 |
| Hartford-West Hartford-East Hartford [CT] | 1,680 | 367 | 415 | 216 |
| Worcester [MA-CT] | 1,530 | 392 | 275 | 171 |
| Sacramento-Roseville-Arden-Arcade [CA] | 1,515 | 374 | 210 | 114 |
| Portland-Vancouver-Hillsboro [OR-WA] | 1,510 | 416 | 200 | 123 |
| Tampa-St. Petersburg-Clearwater [FL] | 1,485 | 408 | 285 | 134 |
| Cincinnati [OH-KY-IN] | 1,455 | 386 | 190 | 99 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 1,420 | 366 | 210 | 134 |
| Pittsburgh [PA] | 1,370 | 308 | 290 | 160 |
| Denver-Aurora-Lakewood [CO] | 1,305 | 455 | 110 | 81 |
| Bridgeport-Stamford-Norwalk [CT] | 1,270 | 469 | 265 | 134 |
| San Antonio-New Braunfels [TX] | 1,260 | 374 | 260 | 167 |
| Richmond [VA] | 1,205 | 500 | 285 | 129 |
| Kansas City [MO-KS] | 1,025 | 310 | 195 | 125 |
| Jacksonville [FL] | 945 | 352 | 155 | 132 |
| Cleveland-Elyria [OH] | 915 | 261 | 170 | 120 |
| Milwaukee-Waukesha-West Allis [WI] | 815 | 311 | 65 | 57 |
| Oxnard-Thousand Oaks-Ventura [CA] | 760 | 242 | 70 | 65 |
| Indianapolis-Carmel-Anderson [IN] | 745 | 407 | 75 | 89 |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 705 | 276 | 150 | 97 |
| Omaha-Council Bluffs [NE-IA] | 680 | 232 | 170 | 109 |
| Providence-Warwick [RI-MA] | 640 | 292 | 245 | 211 |
| Dayton [OH] | 635 | 227 | 115 | 87 |
| Madison [WI] | 610 | 258 | 105 | 81 |
| Albany-Schenectady-Troy [NY] | 600 | 268 | 50 | 56 |
| Memphis [TN-MS-AR] | 585 | 239 | 125 | 89 |
| New Haven-Milford [CT] | 555 | 246 | 185 | 167 |
| Salt Lake City [UT] | 535 | 240 | 145 | 159 |
| Ann Arbor [MI] | 530 | 197 | 65 | 47 |
| Orlando-Kissimmee-Sanford [FL] | 515 | 312 | (D) | (D) |
| Lansing-East Lansing [MI] | 505 | 242 | (D) | (D) |
| Louisville Jefferson County [KY] | 495 | 213 | 50 | 41 |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 485 | 204 | 130 | 83 |
| Harrisburg-Carlisle [PA] | 450 | 193 | 120 | 89 |
| Allentown-Bethlehem-Easton [PA-NJ] | 430 | 215 | 70 | 75 |
| Rochester [NY] | 430 | 168 | (D) | (D) |
| Riverside-San Bernardino-Ontario [CA] | 410 | 184 | 55 | 49 |
| Durham-Chapel Hill [NC] | 390 | 215 | 90 | 82 |
| Manchester-Nashua [NH] | 355 | 200 | (D) | (D) |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 330 | 139 | (D) | (D) |
| Oklahoma City [OK] | 265 | 103 | 40 | 36 |
| Springfield [MA] | 250 | 155 | (B) | - |
| Las Vegas-Henderson-Paradise [NV] | 235 | 146 | 105 | 85 |
| Des Moines-West Des Moines [IA] | 220 | 173 | 60 | 67 |
| Stockton-Lodi [CA] | 210 | 167 | (D) | (D) |
| Akron [OH] | 205 | 146 | (D) | (D) |
| Fresno [CA] | 200 | 135 | (B) | - |
| Greensboro-High Point [NC] | 185 | 151 | (D) | (D) |
| Colorado Springs [CO] | 180 | 126 | (B) | - |
| Syracuse [NY] | 145 | 85 | (D) | (D) |
| Albuquerque [NM] | 135 | 116 | (B) | - |
| Salinas [CA] | 125 | 108 | (D) | (D) |
| Tulsa [OK] | 125 | 91 | (B) | - |
| Grand Rapids-Wyoming [MI] | 120 | 81 | 30 | 41 |
| New Orleans-Metairie [LA] | 115 | 64 | (D) | (D) |
| Bakersfield [CA] | 100 | 99 | (D) | (D) |
| Tucson [AZ] | 100 | 78 | 35 | 39 |
| Vallejo-Fairfield [CA] | 100 | 100 | (D) | (D) |
| Santa Rosa [CA] | 90 | 85 | 25 | 61 |
| Baton Rouge [LA] | 80 | 67 | (B) | - |
| Cape Coral-Fort Myers [FL] | 65 | 93 | (B) | - |
| Reno [NV] | 65 | 128 | (D) | (D) |
| Lancaster [PA] | 60 | 55 | (D) | (D) |
| Portland-South Portland [ME] | 55 | 65 | (D) | (D) |
| Atlantic City-Hammonton [NJ] | 40 | 55 | (D) | (D) |
| New York-Newark-Jersey City [NY-NJ-PA] | 40 | 44 | (B) | - |
| Santa Maria-Santa Barbara [CA] | 40 | 43 | (B) | - |
| Lafayette [LA] | 35 | 39 | (D) | (D) |
| Anchorage [AK] | 30 | 38 | (B) | - |
| Urban Honolulu [HI] | 30 | 34 | (B) | - |
| Deltona-Daytona Beach-Ormond Beach [FL] | (D) | (D) | (D) | (D) |
| Naples-Immokalee-Marco Island [FL] | (D) | (D) | (B) | - |