| Country | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| United States | 253,740 | 7,521 | 104,750 | 3,479 |
| State | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| California | 118,870 | 4,739 | 53,335 | 2,179 |
| New York | 34,410 | 2,937 | 15,100 | 1,601 |
| Washington | 14,265 | 1,690 | 6,145 | 900 |
| New Jersey | 13,990 | 1,453 | 5,555 | 809 |
| Virginia | 8,700 | 1,426 | 2,865 | 601 |
| Texas | 7,735 | 1,202 | 2,720 | 644 |
| Illinois | 6,585 | 939 | 2,310 | 509 |
| Indiana | 5,130 | 876 | 1,755 | 476 |
| Pennsylvania | 4,965 | 933 | 1,980 | 549 |
| Michigan | 4,730 | 790 | 1,470 | 339 |
| Ohio | 4,070 | 720 | 1,560 | 432 |
| Maryland | 3,270 | 742 | 1,100 | 387 |
| Massachusetts | 2,980 | 624 | 1,375 | 506 |
| Arizona | 2,285 | 566 | 730 | 261 |
| North Carolina | 2,150 | 551 | 555 | 229 |
| Georgia | 1,945 | 646 | 580 | 297 |
| Wisconsin | 1,730 | 470 | 685 | 253 |
| Florida | 1,705 | 412 | 490 | 183 |
| Connecticut | 1,590 | 401 | 385 | 146 |
| Nevada | 1,485 | 535 | 600 | 270 |
| Oregon | 1,190 | 544 | 415 | 205 |
| Colorado | 1,105 | 446 | 235 | 139 |
| Minnesota | 840 | 408 | 290 | 230 |
| Kansas | 830 | 301 | 190 | 104 |
| Missouri | 820 | 351 | 245 | 143 |
| Tennessee | 800 | 264 | 260 | 137 |
| South Carolina | 665 | 345 | 235 | 157 |
| Kentucky | 635 | 342 | 195 | 134 |
| Utah | 590 | 261 | 240 | 127 |
| Mississippi | 530 | 206 | 190 | 119 |
| Louisiana | 475 | 233 | 110 | 97 |
| Delaware | 455 | 215 | 180 | 119 |
| Alabama | 435 | 238 | 115 | 91 |
| Iowa | 330 | 168 | 55 | 42 |
| Idaho | 255 | 174 | 160 | 98 |
| Nebraska | 225 | 258 | (D) | (D) |
| Arkansas | 180 | 147 | 40 | 43 |
| New Hampshire | 180 | 137 | 65 | 92 |
| New Mexico | 150 | 127 | 110 | 88 |
| Oklahoma | 115 | 95 | (D) | (D) |
| West Virginia | 90 | 110 | (B) | - |
| South Dakota | 45 | 71 | (D) | (D) |
| Alaska | 40 | 80 | (D) | (D) |
| District of Columbia | (D) | (D) | (B) | - |
| Hawaii | (D) | (D) | (D) | (D) |
| Maine | (D) | (D) | (B) | - |
| Montana | (D) | (D) | (B) | - |
| North Dakota | (D) | (D) | (B) | - |
| Rhode Island | (D) | (D) | (B) | - |
| Vermont | (D) | (D) | (B) | - |
| Wyoming | (D) | (D) | (D) | (D) |
| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Queens County [NY] | 22,860 | 2,396 | 10,295 | 1,214 |
| Santa Clara County [CA] | 12,105 | 1,229 | 5,410 | 669 |
| Sacramento County [CA] | 11,675 | 1,630 | 5,065 | 794 |
| Fresno County [CA] | 11,620 | 1,320 | 5,715 | 712 |
| Alameda County [CA] | 11,255 | 1,617 | 4,570 | 835 |
| King County [WA] | 9,165 | 1,444 | 3,885 | 718 |
| San Joaquin County [CA] | 8,820 | 1,599 | 3,810 | 732 |
| Los Angeles County [CA] | 8,640 | 1,008 | 3,290 | 567 |
| Kern County [CA] | 6,340 | 1,015 | 3,315 | 558 |
| Contra Costa County [CA] | 5,660 | 1,015 | 2,350 | 550 |
| Stanislaus County [CA] | 4,625 | 902 | 2,525 | 664 |
| Middlesex County [NJ] | 4,620 | 799 | 1,890 | 444 |
| Riverside County [CA] | 4,005 | 1,561 | 1,750 | 723 |
| Nassau County [NY] | 3,980 | 762 | 1,515 | 426 |
| Fairfax County [VA] | 3,965 | 910 | 1,455 | 407 |
| Orange County [CA] | 3,605 | 743 | 1,300 | 368 |
| Cook County [IL] | 2,525 | 622 | 1,220 | 413 |
| Solano County [CA] | 2,270 | 649 | 1,030 | 313 |
| Snohomish County [WA] | 2,180 | 562 | 1,030 | 335 |
| Middlesex County [MA] | 2,070 | 567 | 1,055 | 476 |
| Wayne County [MI] | 1,995 | 440 | 655 | 202 |
| Harris County [TX] | 1,975 | 492 | 760 | 292 |
| Maricopa County [AZ] | 1,970 | 523 | 645 | 253 |
| San Diego County [CA] | 1,940 | 592 | 755 | 345 |
| San Bernardino County [CA] | 1,920 | 679 | 665 | 297 |
| San Mateo County [CA] | 1,900 | 590 | 850 | 385 |
| DuPage County [IL] | 1,850 | 556 | 365 | 163 |
| Loudoun County [VA] | 1,830 | 584 | 675 | 281 |
| Bergen County [NJ] | 1,740 | 455 | 785 | 256 |
| Kings County [NY] | 1,475 | 409 | 860 | 256 |
| Mercer County [NJ] | 1,430 | 629 | 640 | 426 |
| Marion County [IN] | 1,400 | 515 | 275 | 222 |
| Delaware County [PA] | 1,365 | 374 | 505 | 193 |
| Yolo County [CA] | 1,310 | 425 | 695 | 293 |
| Burlington County [NJ] | 1,240 | 583 | 645 | 367 |
| Montgomery County [MD] | 1,215 | 428 | 510 | 297 |
| Placer County [CA] | 1,160 | 451 | 295 | 171 |
| Collin County [TX] | 1,095 | 719 | 490 | 351 |
| San Francisco County [CA] | 1,075 | 400 | 225 | 137 |
| Morris County [NJ] | 1,040 | 556 | 540 | 298 |
| Suffolk County [NY] | 1,035 | 344 | 370 | 190 |
| Cuyahoga County [OH] | 1,010 | 324 | 410 | 203 |
| Oakland County [MI] | 990 | 329 | 190 | 109 |
| Baltimore County [MD] | 950 | 460 | 140 | 78 |
| Wake County [NC] | 855 | 408 | 305 | 218 |
| Washoe County [NV] | 845 | 438 | 375 | 221 |
| Hudson County [NJ] | 815 | 332 | 260 | 135 |
| Somerset County [NJ] | 800 | 307 | 125 | 80 |
| Macomb County [MI] | 780 | 379 | 255 | 137 |
| Tarrant County [TX] | 730 | 312 | 320 | 191 |
| Prince William County [VA] | 725 | 315 | 215 | 122 |
| Erie County [NY] | 700 | 327 | 290 | 178 |
| Will County [IL] | 685 | 315 | 280 | 195 |
| Clark County [WA] | 680 | 410 | 220 | 165 |
| Ventura County [CA] | 655 | 324 | 200 | 160 |
| New York County [NY] | 655 | 400 | 355 | 302 |
| Milwaukee County [WI] | 645 | 284 | 345 | 188 |
| Fort Bend County [TX] | 640 | 443 | 115 | 101 |
| Fairfield County [CT] | 625 | 246 | 165 | 109 |
| Washington County [OR] | 620 | 405 | 260 | 178 |
| Johnson County [KS] | 610 | 286 | 170 | 99 |
| Bexar County [TX] | 555 | 301 | 180 | 149 |
| Denton County [TX] | 555 | 290 | 195 | 154 |
| Arlington County [VA] | 555 | 330 | 260 | 166 |
| Gwinnett County [GA] | 525 | 274 | 90 | 71 |
| Monroe County [NY] | 515 | 296 | 210 | 150 |
| Lake County [IL] | 510 | 267 | 235 | 150 |
| Bronx County [NY] | 490 | 223 | 305 | 156 |
| Philadelphia County [PA] | 480 | 367 | 345 | 344 |
| Travis County [TX] | 460 | 380 | (D) | (D) |
| Howard County [MD] | 455 | 237 | 255 | 177 |
| Worcester County [MA] | 455 | 256 | 205 | 190 |
| Broward County [FL] | 450 | 186 | 95 | 74 |
| Clark County [NV] | 440 | 234 | 135 | 126 |
| Westchester County [NY] | 440 | 277 | 50 | 33 |
| Sonoma County [CA] | 430 | 197 | 180 | 99 |
| Cobb County [GA] | 430 | 331 | 285 | 253 |
| Franklin County [OH] | 415 | 247 | 140 | 109 |
| Santa Barbara County [CA] | 405 | 189 | 130 | 89 |
| New Castle County [DE] | 385 | 204 | 125 | 102 |
| Hartford County [CT] | 380 | 215 | 85 | 58 |
| Essex County [NJ] | 380 | 244 | 100 | 73 |
| Camden County [NJ] | 375 | 210 | 70 | 81 |
| Pierce County [WA] | 370 | 203 | 190 | 123 |
| Bucks County [PA] | 360 | 233 | 110 | 87 |
| Jefferson County [KY] | 350 | 275 | 130 | 98 |
| New Haven County [CT] | 340 | 209 | 65 | 52 |
| Union County [NJ] | 335 | 160 | 100 | 77 |
| Ramsey County [MN] | 330 | 327 | 165 | 220 |
| Atlantic County [NJ] | 325 | 163 | 115 | 66 |
| Dallas County [TX] | 315 | 177 | 80 | 62 |
| Suffolk County [MA] | 310 | 187 | 45 | 42 |
| Monterey County [CA] | 285 | 226 | 65 | 63 |
| Arapahoe County [CO] | 285 | 208 | 70 | 56 |
| Salt Lake County [UT] | 275 | 205 | 140 | 93 |
| Dane County [WI] | 275 | 173 | 90 | 79 |
| Richmond County [NY] | 270 | 177 | 45 | 35 |
| Allegheny County [PA] | 270 | 154 | 65 | 46 |
| Mecklenburg County [NC] | 260 | 181 | 80 | 69 |
| Hennepin County [MN] | 255 | 212 | 50 | 51 |
| Montgomery County [PA] | 250 | 167 | 65 | 57 |
| Shelby County [TN] | 245 | 107 | 80 | 51 |
| Virginia Beach city [VA] | 205 | 186 | 35 | 54 |
| Palm Beach County [FL] | 180 | 110 | 35 | 29 |
| Prince George s County [MD] | 180 | 113 | 85 | 74 |
| Miami-Dade County [FL] | 175 | 150 | 95 | 87 |
| Guilford County [NC] | 175 | 121 | 15 | 44 |
| Lancaster County [PA] | 170 | 194 | 95 | 127 |
| Kane County [IL] | 165 | 156 | 55 | 73 |
| St. Louis County [MO] | 165 | 111 | 30 | 42 |
| Monmouth County [NJ] | 165 | 137 | 45 | 49 |
| Onondaga County [NY] | 165 | 144 | 55 | 63 |
| Pima County [AZ] | 155 | 102 | (D) | (D) |
| Fulton County [GA] | 155 | 112 | (D) | (D) |
| Polk County [IA] | 150 | 139 | (D) | (D) |
| Albany County [NY] | 150 | 91 | (D) | (D) |
| Orange County [FL] | 145 | 115 | (D) | (D) |
| Anne Arundel County [MD] | 140 | 115 | 50 | 58 |
| Rockland County [NY] | 140 | 113 | (D) | (D) |
| Hamilton County [OH] | 140 | 108 | 90 | 85 |
| Jefferson Parish [LA] | 115 | 107 | (D) | (D) |
| Washtenaw County [MI] | 115 | 78 | (B) | - |
| Duval County [FL] | 95 | 100 | (D) | (D) |
| Navajo County [AZ] | 90 | 95 | (D) | (D) |
| DeKalb County [GA] | 80 | 84 | (D) | (D) |
| Dakota County [MN] | 75 | 91 | 45 | 61 |
| Chester County [PA] | 70 | 59 | 35 | 35 |
| Davidson County [TN] | 70 | 44 | 35 | 34 |
| Orange County [NY] | 65 | 87 | (D) | (D) |
| Hampden County [MA] | 60 | 72 | 25 | 38 |
| Ocean County [NJ] | 60 | 64 | (D) | (D) |
| Denver County [CO] | 55 | 65 | (D) | (D) |
| Oklahoma County [OK] | 55 | 46 | (D) | (D) |
| Hillsborough County [FL] | 45 | 52 | (D) | (D) |
| Norfolk County [MA] | 45 | 62 | (D) | (D) |
| Bernalillo County [NM] | 45 | 60 | 30 | 33 |
| Henrico County [VA] | 45 | 51 | (D) | (D) |
| Anchorage Municipality [AK] | 40 | 80 | (D) | (D) |
| El Paso County [CO] | 35 | 53 | (D) | (D) |
| Pinellas County [FL] | 20 | 29 | (B) | - |
| Baltimore city [MD] | 20 | 24 | (D) | (D) |
| District of Columbia [DC] | (D) | (D) | (B) | - |
| Collier County [FL] | (D) | (D) | (D) | (D) |
| Honolulu County [HI] | (D) | (D) | (D) | (D) |
| Bristol County [MA] | (D) | (D) | (B) | - |
| Hillsborough County [NH] | (D) | (D) | (B) | - |
| Passaic County [NJ] | (D) | (D) | (D) | (D) |
| Multnomah County [OR] | (D) | (D) | (B) | - |
| Providence County [RI] | (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] | 41,900 | 2,969 | 17,910 | 1,665 |
| San Francisco-Oakland-Hayward [CA] | 19,985 | 2,339 | 8,060 | 1,149 |
| Sacramento-Roseville-Arden-Arcade [CA] | 14,430 | 1,817 | 6,070 | 853 |
| San Jose-Sunnyvale-Santa Clara [CA] | 12,260 | 1,229 | 5,525 | 675 |
| Los Angeles-Long Beach-Anaheim [CA] | 12,245 | 1,167 | 4,585 | 686 |
| Seattle-Tacoma-Bellevue [WA] | 11,715 | 1,569 | 5,105 | 807 |
| Fresno [CA] | 11,620 | 1,320 | 5,715 | 712 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 8,955 | 1,364 | 3,300 | 638 |
| Stockton-Lodi [CA] | 8,820 | 1,599 | 3,810 | 732 |
| Chicago-Naperville-Elgin [IL-IN] | 6,410 | 872 | 2,235 | 499 |
| Bakersfield [CA] | 6,340 | 1,015 | 3,315 | 558 |
| Riverside-San Bernardino-Ontario [CA] | 5,925 | 1,657 | 2,415 | 761 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 4,725 | 827 | 1,975 | 547 |
| Modesto [CA] | 4,625 | 902 | 2,525 | 664 |
| Indianapolis-Carmel-Anderson [IN] | 4,110 | 794 | 1,385 | 412 |
| Detroit-Warren-Dearborn [MI] | 3,765 | 650 | 1,100 | 262 |
| Houston-The Woodlands-Sugar Land [TX] | 2,790 | 661 | 930 | 312 |
| Dallas-Fort Worth-Arlington [TX] | 2,765 | 941 | 1,100 | 432 |
| Boston-Cambridge-Newton [MA-NH] | 2,545 | 603 | 1,185 | 491 |
| Vallejo-Fairfield [CA] | 2,270 | 649 | 1,030 | 313 |
| Phoenix-Mesa-Scottsdale [AZ] | 1,985 | 525 | 660 | 254 |
| San Diego-Carlsbad [CA] | 1,940 | 592 | 755 | 345 |
| Baltimore-Columbia-Towson [MD] | 1,710 | 560 | 480 | 216 |
| Trenton [NJ] | 1,430 | 629 | 640 | 426 |
| Atlanta-Sandy Springs-Roswell [GA] | 1,390 | 500 | 460 | 288 |
| Portland-Vancouver-Hillsboro [OR-WA] | 1,310 | 620 | 480 | 275 |
| Cleveland-Elyria [OH] | 1,305 | 370 | 485 | 224 |
| Allentown-Bethlehem-Easton [PA-NJ] | 1,230 | 590 | 460 | 268 |
| Milwaukee-Waukesha-West Allis [WI] | 920 | 322 | 400 | 191 |
| Kansas City [MO-KS] | 900 | 304 | 275 | 110 |
| Denver-Aurora-Lakewood [CO] | 880 | 438 | 180 | 129 |
| Cincinnati [OH-KY-IN] | 855 | 348 | 405 | 202 |
| Raleigh [NC] | 855 | 408 | 305 | 218 |
| Reno [NV] | 845 | 438 | 375 | 221 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 805 | 250 | 225 | 125 |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 780 | 338 | 295 | 177 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 720 | 399 | 280 | 229 |
| Akron [OH] | 700 | 342 | 415 | 240 |
| Oxnard-Thousand Oaks-Ventura [CA] | 655 | 324 | 200 | 160 |
| Bridgeport-Stamford-Norwalk [CT] | 625 | 246 | 165 | 109 |
| Hartford-West Hartford-East Hartford [CT] | 575 | 260 | 155 | 97 |
| Rochester [NY] | 575 | 321 | 230 | 159 |
| Austin-Round Rock [TX] | 570 | 392 | 70 | 57 |
| Richmond [VA] | 570 | 294 | 80 | 69 |
| San Antonio-New Braunfels [TX] | 570 | 300 | 195 | 150 |
| St. Louis [MO-IL] | 535 | 252 | 140 | 115 |
| Charlotte-Concord-Gastonia [NC-SC] | 510 | 271 | 125 | 93 |
| Columbus [OH] | 485 | 264 | 140 | 109 |
| Worcester [MA-CT] | 455 | 256 | 205 | 190 |
| Las Vegas-Henderson-Paradise [NV] | 440 | 234 | 135 | 126 |
| Santa Rosa [CA] | 430 | 197 | 180 | 99 |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 430 | 268 | 85 | 70 |
| Santa Maria-Santa Barbara [CA] | 405 | 189 | 130 | 89 |
| Albany-Schenectady-Troy [NY] | 385 | 158 | 85 | 57 |
| Orlando-Kissimmee-Sanford [FL] | 355 | 260 | 50 | 43 |
| Dayton [OH] | 350 | 215 | 95 | 70 |
| Louisville Jefferson County [KY] | 350 | 275 | 130 | 98 |
| New Haven-Milford [CT] | 340 | 209 | 65 | 52 |
| Atlantic City-Hammonton [NJ] | 325 | 163 | 115 | 66 |
| Lansing-East Lansing [MI] | 325 | 214 | 185 | 141 |
| Madison [WI] | 310 | 180 | 90 | 79 |
| Memphis [TN-MS-AR] | 305 | 130 | 80 | 51 |
| Pittsburgh [PA] | 300 | 164 | 85 | 60 |
| Salinas [CA] | 285 | 226 | 65 | 63 |
| Harrisburg-Carlisle [PA] | 280 | 275 | 130 | 110 |
| Salt Lake City [UT] | 275 | 205 | 140 | 93 |
| Grand Rapids-Wyoming [MI] | 235 | 156 | 80 | 84 |
| Greensboro-High Point [NC] | 230 | 137 | 40 | 54 |
| Syracuse [NY] | 225 | 178 | 75 | 72 |
| Durham-Chapel Hill [NC] | 175 | 171 | (D) | (D) |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 175 | 153 | 35 | 34 |
| Lancaster [PA] | 170 | 194 | 95 | 127 |
| Tampa-St. Petersburg-Clearwater [FL] | 170 | 100 | 20 | 22 |
| Tucson [AZ] | 155 | 102 | (D) | (D) |
| Des Moines-West Des Moines [IA] | 150 | 139 | (D) | (D) |
| Jacksonville [FL] | 150 | 119 | 90 | 83 |
| Spokane-Spokane Valley [WA] | 130 | 103 | 75 | 74 |
| Ann Arbor [MI] | 115 | 78 | (B) | - |
| New Orleans-Metairie [LA] | 115 | 107 | (D) | (D) |
| Show Low [AZ] | 90 | 95 | (D) | (D) |
| Springfield [MA] | 85 | 83 | 50 | 53 |
| Lafayette [LA] | 80 | 107 | (D) | (D) |
| Baton Rouge [LA] | 75 | 89 | (B) | - |
| Albuquerque [NM] | 55 | 63 | 40 | 38 |
| Oklahoma City [OK] | 55 | 46 | (D) | (D) |
| Omaha-Council Bluffs [NE-IA] | 45 | 53 | (D) | (D) |
| Anchorage [AK] | 40 | 80 | (D) | (D) |
| Tulsa [OK] | 40 | 65 | (D) | (D) |
| Colorado Springs [CO] | 35 | 53 | (D) | (D) |
| Deltona-Daytona Beach-Ormond Beach [FL] | (D) | (D) | (B) | - |
| Manchester-Nashua [NH] | (D) | (D) | (B) | - |
| Naples-Immokalee-Marco Island [FL] | (D) | (D) | (D) | (D) |
| Portland-South Portland [ME] | (D) | (D) | (B) | - |
| Providence-Warwick [RI-MA] | (D) | (D) | (B) | - |
| Urban Honolulu [HI] | (D) | (D) | (D) | (D) |