| Country | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| United States | 458,840 | 6,487 | 257,625 | 4,433 |
| State | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| California | 234,775 | 4,553 | 133,380 | 3,021 |
| New York | 95,915 | 3,289 | 58,365 | 2,456 |
| Massachusetts | 18,920 | 1,542 | 11,020 | 1,161 |
| Illinois | 13,905 | 1,248 | 7,615 | 791 |
| Washington | 12,430 | 1,331 | 6,675 | 952 |
| Texas | 10,240 | 1,075 | 4,870 | 636 |
| New Jersey | 8,845 | 1,129 | 3,365 | 603 |
| Hawaii | 7,890 | 852 | 5,375 | 648 |
| Pennsylvania | 6,460 | 828 | 3,715 | 634 |
| Florida | 6,355 | 1,090 | 3,130 | 646 |
| Nevada | 4,495 | 816 | 2,525 | 620 |
| Virginia | 3,930 | 753 | 1,730 | 475 |
| Maryland | 3,820 | 561 | 1,735 | 349 |
| Oregon | 3,425 | 582 | 1,910 | 402 |
| Arizona | 3,045 | 607 | 1,445 | 367 |
| Georgia | 2,750 | 635 | 1,110 | 347 |
| Michigan | 2,325 | 418 | 1,070 | 296 |
| Connecticut | 2,250 | 587 | 1,000 | 393 |
| Colorado | 1,940 | 535 | 890 | 308 |
| Ohio | 1,845 | 396 | 700 | 232 |
| North Carolina | 1,630 | 465 | 610 | 281 |
| Minnesota | 1,555 | 357 | 655 | 210 |
| Utah | 1,350 | 360 | 570 | 185 |
| Indiana | 1,035 | 296 | 500 | 192 |
| Missouri | 890 | 317 | 510 | 223 |
| Wisconsin | 770 | 260 | 420 | 200 |
| Kansas | 560 | 268 | 340 | 224 |
| District of Columbia | 555 | 200 | 250 | 108 |
| Rhode Island | 535 | 193 | 205 | 108 |
| Oklahoma | 445 | 168 | 190 | 91 |
| Tennessee | 415 | 204 | 160 | 111 |
| Louisiana | 385 | 211 | 120 | 93 |
| New Hampshire | 375 | 191 | 235 | 126 |
| South Carolina | 375 | 199 | 205 | 129 |
| Idaho | 355 | 224 | 140 | 115 |
| Iowa | 335 | 208 | 130 | 84 |
| Delaware | 240 | 119 | 85 | 77 |
| New Mexico | 230 | 112 | 145 | 93 |
| Maine | 205 | 140 | 175 | 130 |
| Alabama | 195 | 91 | 50 | 38 |
| Kentucky | 160 | 94 | (D) | (D) |
| Arkansas | 155 | 71 | 110 | 71 |
| Puerto Rico | 145 | 134 | 120 | 125 |
| Mississippi | 135 | 90 | 60 | 37 |
| Nebraska | 90 | 54 | 35 | 28 |
| Alaska | 80 | 70 | (D) | (D) |
| South Dakota | 65 | 56 | (D) | (D) |
| West Virginia | 60 | 50 | (D) | (D) |
| Montana | 45 | 48 | (D) | (D) |
| Vermont | 40 | 28 | (B) | - |
| North Dakota | (D) | (D) | (B) | - |
| Wyoming | (D) | (D) | (B) | - |
| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Los Angeles County [CA] | 71,100 | 2,676 | 41,515 | 1,915 |
| San Francisco County [CA] | 59,515 | 2,514 | 38,820 | 1,923 |
| Kings County [NY] | 49,325 | 2,421 | 32,760 | 1,740 |
| Alameda County [CA] | 31,050 | 1,687 | 18,895 | 1,130 |
| Queens County [NY] | 22,505 | 1,853 | 13,195 | 1,254 |
| San Mateo County [CA] | 16,040 | 1,442 | 6,930 | 913 |
| Santa Clara County [CA] | 15,265 | 1,440 | 7,090 | 883 |
| New York County [NY] | 13,320 | 1,338 | 7,835 | 1,049 |
| Cook County [IL] | 11,355 | 1,064 | 6,605 | 722 |
| King County [WA] | 9,845 | 1,193 | 5,215 | 849 |
| Sacramento County [CA] | 9,320 | 1,379 | 5,455 | 934 |
| Honolulu County [HI] | 7,805 | 870 | 5,350 | 647 |
| Contra Costa County [CA] | 7,200 | 929 | 3,660 | 579 |
| Norfolk County [MA] | 6,095 | 811 | 3,845 | 677 |
| Middlesex County [MA] | 6,065 | 918 | 3,200 | 644 |
| Orange County [CA] | 5,580 | 664 | 2,205 | 444 |
| Suffolk County [MA] | 4,720 | 637 | 3,005 | 514 |
| San Diego County [CA] | 4,510 | 658 | 1,980 | 396 |
| Clark County [NV] | 4,215 | 812 | 2,445 | 621 |
| Harris County [TX] | 4,010 | 722 | 2,330 | 500 |
| Philadelphia County [PA] | 4,005 | 772 | 2,740 | 581 |
| Middlesex County [NJ] | 2,520 | 538 | 990 | 282 |
| Nassau County [NY] | 2,435 | 510 | 1,020 | 263 |
| Riverside County [CA] | 2,325 | 750 | 970 | 412 |
| Maricopa County [AZ] | 2,235 | 575 | 1,010 | 346 |
| Richmond County [NY] | 2,130 | 414 | 1,145 | 272 |
| Multnomah County [OR] | 2,005 | 535 | 1,205 | 383 |
| San Joaquin County [CA] | 1,985 | 488 | 1,180 | 399 |
| San Bernardino County [CA] | 1,975 | 495 | 1,075 | 435 |
| Fairfax County [VA] | 1,850 | 524 | 805 | 331 |
| Montgomery County [MD] | 1,790 | 392 | 930 | 261 |
| Fort Bend County [TX] | 1,720 | 559 | 705 | 248 |
| Snohomish County [WA] | 1,615 | 517 | 1,015 | 391 |
| Broward County [FL] | 1,390 | 573 | 705 | 294 |
| Hudson County [NJ] | 1,345 | 438 | 450 | 245 |
| Yolo County [CA] | 1,335 | 418 | 345 | 157 |
| Miami-Dade County [FL] | 1,240 | 553 | 840 | 426 |
| Gwinnett County [GA] | 1,225 | 489 | 465 | 258 |
| Suffolk County [NY] | 970 | 222 | 265 | 112 |
| Collin County [TX] | 920 | 349 | 485 | 201 |
| Morris County [NJ] | 885 | 301 | 395 | 180 |
| Orange County [FL] | 865 | 431 | 405 | 238 |
| Palm Beach County [FL] | 830 | 490 | 440 | 277 |
| Hennepin County [MN] | 820 | 310 | 305 | 162 |
| Monmouth County [NJ] | 820 | 279 | 300 | 136 |
| Ventura County [CA] | 805 | 278 | 340 | 183 |
| Salt Lake County [UT] | 795 | 288 | 370 | 150 |
| Erie County [NY] | 780 | 293 | 220 | 162 |
| Solano County [CA] | 740 | 318 | 345 | 197 |
| DuPage County [IL] | 740 | 257 | 255 | 160 |
| Bronx County [NY] | 730 | 240 | 500 | 168 |
| Travis County [TX] | 725 | 262 | 245 | 112 |
| New Haven County [CT] | 670 | 313 | 270 | 158 |
| Monroe County [NY] | 645 | 256 | 265 | 183 |
| Oakland County [MI] | 635 | 215 | 290 | 131 |
| Westchester County [NY] | 635 | 253 | 200 | 147 |
| Pima County [AZ] | 630 | 260 | 325 | 187 |
| Washtenaw County [MI] | 625 | 188 | 285 | 193 |
| Bergen County [NJ] | 615 | 223 | 300 | 160 |
| Essex County [MA] | 605 | 274 | 370 | 186 |
| Howard County [MD] | 595 | 216 | 185 | 112 |
| Mecklenburg County [NC] | 595 | 384 | 155 | 202 |
| Dallas County [TX] | 590 | 201 | 215 | 127 |
| Santa Barbara County [CA] | 575 | 238 | 120 | 96 |
| Delaware County [PA] | 575 | 220 | 265 | 105 |
| Tarrant County [TX] | 570 | 200 | 200 | 99 |
| Fresno County [CA] | 565 | 221 | 265 | 121 |
| Stanislaus County [CA] | 565 | 232 | 375 | 183 |
| District of Columbia [DC] | 555 | 200 | 250 | 108 |
| Sonoma County [CA] | 530 | 253 | 325 | 164 |
| Lake County [IL] | 510 | 202 | 255 | 125 |
| Prince George s County [MD] | 505 | 222 | 225 | 107 |
| Somerset County [NJ] | 490 | 192 | 95 | 66 |
| Loudoun County [VA] | 485 | 261 | 235 | 160 |
| Essex County [NJ] | 480 | 196 | 145 | 82 |
| Fairfield County [CT] | 465 | 251 | 150 | 113 |
| Kern County [CA] | 460 | 300 | 265 | 181 |
| Worcester County [MA] | 445 | 213 | 210 | 109 |
| Providence County [RI] | 425 | 180 | 185 | 104 |
| Arapahoe County [CO] | 420 | 203 | 180 | 99 |
| Cuyahoga County [OH] | 410 | 140 | 195 | 105 |
| Pierce County [WA] | 410 | 189 | 200 | 117 |
| Fulton County [GA] | 405 | 267 | 205 | 189 |
| Arlington County [VA] | 405 | 222 | 70 | 59 |
| Placer County [CA] | 400 | 184 | 160 | 103 |
| Hartford County [CT] | 390 | 206 | 145 | 127 |
| Montgomery County [PA] | 390 | 148 | 135 | 78 |
| Union County [NJ] | 375 | 233 | 140 | 124 |
| Washington County [OR] | 365 | 173 | 150 | 96 |
| St. Louis County [MO] | 355 | 173 | 205 | 137 |
| Franklin County [OH] | 355 | 137 | 105 | 83 |
| Onondaga County [NY] | 340 | 148 | 140 | 74 |
| Bexar County [TX] | 335 | 146 | 105 | 76 |
| Atlantic County [NJ] | 325 | 205 | 130 | 119 |
| Will County [IL] | 315 | 207 | 180 | 121 |
| Camden County [NJ] | 315 | 179 | 140 | 74 |
| Wake County [NC] | 305 | 175 | 145 | 115 |
| Pinellas County [FL] | 300 | 236 | 55 | 50 |
| Macomb County [MI] | 300 | 191 | 170 | 127 |
| Hillsborough County [FL] | 290 | 198 | 190 | 150 |
| Baltimore County [MD] | 270 | 145 | 155 | 110 |
| Monterey County [CA] | 265 | 188 | 135 | 138 |
| Allegheny County [PA] | 265 | 131 | 135 | 86 |
| Bucks County [PA] | 265 | 137 | 95 | 102 |
| Denver County [CO] | 255 | 113 | 105 | 75 |
| DeKalb County [GA] | 245 | 113 | 120 | 82 |
| Wayne County [MI] | 240 | 137 | 85 | 66 |
| New Castle County [DE] | 235 | 118 | 80 | 77 |
| Ramsey County [MN] | 230 | 139 | 90 | 71 |
| Bernalillo County [NM] | 230 | 112 | 145 | 93 |
| Johnson County [KS] | 225 | 144 | 100 | 86 |
| Washoe County [NV] | 225 | 123 | 55 | 53 |
| El Paso County [CO] | 220 | 171 | 70 | 91 |
| Plymouth County [MA] | 215 | 120 | 105 | 58 |
| Dane County [WI] | 215 | 92 | 125 | 81 |
| Mercer County [NJ] | 210 | 116 | 55 | 54 |
| Anne Arundel County [MD] | 205 | 129 | 120 | 84 |
| Kane County [IL] | 200 | 166 | (D) | (D) |
| Albany County [NY] | 200 | 136 | 65 | 66 |
| Henrico County [VA] | 200 | 168 | 140 | 127 |
| Cobb County [GA] | 195 | 127 | 35 | 36 |
| Passaic County [NJ] | 195 | 180 | 110 | 93 |
| Hampden County [MA] | 185 | 151 | 50 | 49 |
| Hillsborough County [NH] | 185 | 154 | 120 | 93 |
| Baltimore city [MD] | 170 | 84 | 50 | 44 |
| Denton County [TX] | 170 | 122 | 40 | 41 |
| Milwaukee County [WI] | 170 | 109 | 60 | 63 |
| Shelby County [TN] | 165 | 126 | 80 | 80 |
| Bristol County [MA] | 155 | 108 | 80 | 75 |
| Hamilton County [OH] | 145 | 94 | 70 | 69 |
| Prince William County [VA] | 145 | 132 | (B) | - |
| Davidson County [TN] | 135 | 92 | (D) | (D) |
| Marion County [IN] | 125 | 87 | 30 | 39 |
| Virginia Beach city [VA] | 125 | 84 | 90 | 62 |
| Dakota County [MN] | 120 | 84 | 75 | 65 |
| Clark County [WA] | 115 | 56 | 40 | 36 |
| Polk County [IA] | 110 | 129 | (D) | (D) |
| Burlington County [NJ] | 105 | 83 | 40 | 56 |
| Oklahoma County [OK] | 105 | 51 | 50 | 34 |
| Chester County [PA] | 105 | 68 | 55 | 39 |
| Ocean County [NJ] | 100 | 81 | 60 | 66 |
| Rockland County [NY] | 75 | 66 | (D) | (D) |
| Hawaii County [HI] | 70 | 54 | 25 | 27 |
| Duval County [FL] | 65 | 44 | 40 | 38 |
| Lancaster County [PA] | 65 | 46 | 45 | 32 |
| Anchorage Municipality [AK] | 40 | 40 | (B) | - |
| Jefferson Parish [LA] | 40 | 33 | (D) | (D) |
| Guilford County [NC] | 25 | 28 | (D) | (D) |
| Orange County [NY] | 20 | 22 | (D) | (D) |
| Collier County [FL] | (D) | (D) | (B) | - |
| Lee County [FL] | (D) | (D) | (B) | - |
| Maui County [HI] | (D) | (D) | (B) | - |
| Jefferson County [KY] | (D) | (D) | (B) | - |
| City / Metropolitan area / CBSA | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| San Francisco-Oakland-Hayward [CA] | 114,360 | 3,669 | 68,445 | 2,526 |
| New York-Newark-Jersey City [NY] | 100,440 | 3,622 | 60,190 | 2,563 |
| Los Angeles-Long Beach-Anaheim [CA] | 76,680 | 2,817 | 43,720 | 2,017 |
| Boston-Cambridge-Newton [MA-NH] | 17,780 | 1,513 | 10,550 | 1,153 |
| San Jose-Sunnyvale-Santa Clara [CA] | 15,265 | 1,440 | 7,090 | 883 |
| Chicago-Naperville-Elgin [IL-IN] | 13,265 | 1,227 | 7,400 | 768 |
| Seattle-Tacoma-Bellevue [WA] | 11,870 | 1,350 | 6,430 | 949 |
| Sacramento-Roseville-Arden-Arcade [CA] | 11,150 | 1,469 | 5,975 | 960 |
| Urban Honolulu [HI] | 7,805 | 870 | 5,350 | 647 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 6,035 | 863 | 3,550 | 646 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 5,995 | 936 | 2,655 | 583 |
| Houston-The Woodlands-Sugar Land [TX] | 5,925 | 976 | 3,075 | 579 |
| San Diego-Carlsbad [CA] | 4,510 | 658 | 1,980 | 396 |
| Riverside-San Bernardino-Ontario [CA] | 4,300 | 871 | 2,045 | 629 |
| Las Vegas-Henderson-Paradise [NV] | 4,215 | 812 | 2,445 | 621 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 3,460 | 949 | 1,985 | 593 |
| Portland-Vancouver-Hillsboro [OR-WA] | 2,855 | 550 | 1,590 | 395 |
| Atlanta-Sandy Springs-Roswell [GA] | 2,400 | 645 | 985 | 360 |
| Dallas-Fort Worth-Arlington [TX] | 2,300 | 460 | 985 | 262 |
| Phoenix-Mesa-Scottsdale [AZ] | 2,295 | 595 | 1,040 | 364 |
| Stockton-Lodi [CA] | 1,985 | 488 | 1,180 | 399 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 1,375 | 355 | 540 | 195 |
| Denver-Aurora-Lakewood [CO] | 1,365 | 449 | 650 | 241 |
| Baltimore-Columbia-Towson [MD] | 1,270 | 291 | 540 | 178 |
| Orlando-Kissimmee-Sanford [FL] | 1,270 | 528 | 595 | 289 |
| Detroit-Warren-Dearborn [MI] | 1,190 | 316 | 555 | 186 |
| Austin-Round Rock [TX] | 1,045 | 367 | 435 | 227 |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 805 | 299 | 220 | 162 |
| Oxnard-Thousand Oaks-Ventura [CA] | 805 | 278 | 340 | 183 |
| Salt Lake City [UT] | 795 | 288 | 370 | 150 |
| Vallejo-Fairfield [CA] | 740 | 318 | 345 | 197 |
| Columbus [OH] | 720 | 240 | 300 | 156 |
| Providence-Warwick [RI-MA] | 690 | 226 | 285 | 129 |
| Charlotte-Concord-Gastonia [NC-SC] | 675 | 382 | 180 | 201 |
| New Haven-Milford [CT] | 670 | 313 | 270 | 158 |
| Rochester [NY] | 665 | 253 | 265 | 183 |
| Tucson [AZ] | 630 | 260 | 325 | 187 |
| Ann Arbor [MI] | 625 | 188 | 285 | 193 |
| Tampa-St. Petersburg-Clearwater [FL] | 615 | 307 | 260 | 160 |
| Santa Maria-Santa Barbara [CA] | 575 | 238 | 120 | 96 |
| Fresno [CA] | 565 | 221 | 265 | 121 |
| Modesto [CA] | 565 | 232 | 375 | 183 |
| Hartford-West Hartford-East Hartford [CT] | 530 | 228 | 185 | 164 |
| Santa Rosa [CA] | 530 | 253 | 325 | 164 |
| Springfield [MA] | 510 | 220 | 140 | 92 |
| St. Louis [MO-IL] | 495 | 221 | 220 | 142 |
| Worcester [MA-CT] | 470 | 216 | 235 | 115 |
| Bridgeport-Stamford-Norwalk [CT] | 465 | 251 | 150 | 113 |
| Bakersfield [CA] | 460 | 300 | 265 | 181 |
| Cleveland-Elyria [OH] | 460 | 146 | 215 | 104 |
| Indianapolis-Carmel-Anderson [IN] | 425 | 190 | 135 | 87 |
| Albany-Schenectady-Troy [NY] | 410 | 181 | 115 | 80 |
| San Antonio-New Braunfels [TX] | 385 | 152 | 120 | 80 |
| Syracuse [NY] | 375 | 151 | 145 | 75 |
| Richmond [VA] | 365 | 197 | 230 | 157 |
| Pittsburgh [PA] | 360 | 153 | 150 | 91 |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 345 | 194 | 205 | 117 |
| Kansas City [MO-KS] | 330 | 157 | 170 | 108 |
| Milwaukee-Waukesha-West Allis [WI] | 330 | 170 | 165 | 118 |
| Atlantic City-Hammonton [NJ] | 325 | 205 | 130 | 119 |
| Raleigh [NC] | 305 | 175 | 145 | 115 |
| Salinas [CA] | 265 | 188 | 135 | 138 |
| Madison [WI] | 250 | 95 | 140 | 82 |
| Albuquerque [NM] | 230 | 112 | 145 | 93 |
| Reno [NV] | 225 | 123 | 55 | 53 |
| Colorado Springs [CO] | 220 | 171 | 70 | 91 |
| Oklahoma City [OK] | 215 | 107 | 80 | 58 |
| Trenton [NJ] | 210 | 116 | 55 | 54 |
| Grand Rapids-Wyoming [MI] | 195 | 153 | 70 | 64 |
| Cincinnati [OH-KY-IN] | 190 | 110 | 105 | 85 |
| Manchester-Nashua [NH] | 185 | 154 | 120 | 93 |
| Memphis [TN-MS-AR] | 180 | 127 | 80 | 80 |
| Durham-Chapel Hill [NC] | 175 | 87 | 70 | 70 |
| Dayton [OH] | 165 | 109 | (D) | (D) |
| Allentown-Bethlehem-Easton [PA-NJ] | 150 | 110 | (D) | (D) |
| Lansing-East Lansing [MI] | 145 | 92 | 85 | 75 |
| Baton Rouge [LA] | 135 | 145 | (D) | (D) |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 135 | 92 | (D) | (D) |
| Akron [OH] | 130 | 81 | (D) | (D) |
| Des Moines-West Des Moines [IA] | 110 | 129 | (D) | (D) |
| Tulsa [OK] | 110 | 111 | 40 | 49 |
| New Orleans-Metairie [LA] | 105 | 63 | (D) | (D) |
| New York-Newark-Jersey City [NY-NJ-PA] | 100 | 103 | (D) | (D) |
| Harrisburg-Carlisle [PA] | 85 | 81 | (D) | (D) |
| Deltona-Daytona Beach-Ormond Beach [FL] | 70 | 73 | 65 | 70 |
| Hilo [HI] | 70 | 54 | 25 | 27 |
| Jacksonville [FL] | 65 | 44 | 40 | 38 |
| Lancaster [PA] | 65 | 46 | 45 | 32 |
| Spokane-Spokane Valley [WA] | 60 | 71 | 45 | 65 |
| Portland-South Portland [ME] | 55 | 61 | (D) | (D) |
| Anchorage [AK] | 40 | 40 | (B) | - |
| Louisville Jefferson County [KY] | 40 | 39 | (B) | - |
| Omaha-Council Bluffs [NE-IA] | 35 | 31 | (D) | (D) |
| Greensboro-High Point [NC] | 25 | 28 | (D) | (D) |
| Kahului-Wailuku-Lahaina [HI] | 15 | 23 | (D) | (D) |
| Cape Coral-Fort Myers [FL] | (D) | (D) | (B) | - |
| Naples-Immokalee-Marco Island [FL] | (D) | (D) | (B) | - |