| Country | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| United States | 143,887 | 4,166 | 58,617 | 2,664 |
| State | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| California | 38,197 | 2,358 | 17,004 | 1,469 |
| Michigan | 27,323 | 1,954 | 12,345 | 1,182 |
| Illinois | 15,850 | 1,960 | 6,457 | 1,046 |
| New York | 8,763 | 1,115 | 3,462 | 650 |
| Arizona | 5,385 | 1,103 | 2,551 | 656 |
| Florida | 4,876 | 823 | 1,968 | 444 |
| Minnesota | 4,581 | 481 | 1,527 | 329 |
| New Jersey | 4,207 | 673 | 1,791 | 334 |
| Texas | 2,766 | 541 | 819 | 310 |
| Washington | 2,611 | 526 | 954 | 292 |
| Virginia | 2,133 | 498 | 731 | 339 |
| Oregon | 2,018 | 735 | 804 | 390 |
| Massachusetts | 1,823 | 382 | 544 | 219 |
| Georgia | 1,755 | 507 | 652 | 384 |
| Ohio | 1,623 | 409 | 519 | 225 |
| Pennsylvania | 1,230 | 247 | 455 | 156 |
| North Carolina | 1,164 | 350 | 381 | 170 |
| Maryland | 988 | 292 | 282 | 121 |
| Wisconsin | 975 | 211 | 242 | 86 |
| Connecticut | 965 | 226 | 234 | 84 |
| Utah | 903 | 230 | 248 | 140 |
| Alabama | 858 | 434 | 454 | 256 |
| Colorado | 856 | 271 | 344 | 164 |
| Nevada | 818 | 265 | 314 | 194 |
| Mississippi | 754 | 481 | 388 | 344 |
| Nebraska | 727 | 437 | 577 | 432 |
| Idaho | 719 | 164 | 303 | 116 |
| South Carolina | 667 | 193 | 119 | 97 |
| Missouri | 655 | 204 | 63 | 53 |
| Oklahoma | 618 | 385 | 360 | 367 |
| Tennessee | 610 | 274 | 201 | 136 |
| New Hampshire | 570 | 206 | 76 | 96 |
| Arkansas | 510 | 291 | 53 | 58 |
| Iowa | 471 | 190 | 149 | 104 |
| District of Columbia | 466 | 158 | 114 | 84 |
| Indiana | 435 | 136 | 95 | 69 |
| South Dakota | 415 | 197 | 180 | 174 |
| Kentucky | 401 | 187 | 151 | 134 |
| Louisiana | 388 | 125 | 43 | 35 |
| Rhode Island | 373 | 143 | 144 | 94 |
| Kansas | 323 | 171 | 178 | 153 |
| New Mexico | 283 | 142 | 103 | 121 |
| Alaska | 269 | 103 | 39 | 41 |
| West Virginia | 255 | 120 | 63 | 89 |
| Maine | 237 | 102 | 30 | 30 |
| Delaware | 225 | 91 | 6 | 11 |
| North Dakota | 212 | 110 | 71 | 73 |
| Hawaii | 202 | 86 | 10 | 16 |
| Vermont | 199 | 81 | 11 | 16 |
| Montana | 155 | 63 | 4 | 7 |
| Wyoming | 80 | 49 | 4 | 7 |
| Puerto Rico | 50 | 50 | (B) | - |
| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Cook County [IL] | 14,023 | 1,866 | 5,914 | 995 |
| Macomb County [MI] | 12,368 | 1,383 | 7,004 | 917 |
| San Diego County [CA] | 11,697 | 1,585 | 5,978 | 989 |
| Oakland County [MI] | 10,642 | 1,286 | 3,955 | 675 |
| Stanislaus County [CA] | 8,089 | 1,139 | 3,372 | 542 |
| Los Angeles County [CA] | 5,439 | 776 | 2,066 | 373 |
| Maricopa County [AZ] | 4,729 | 1,065 | 2,341 | 635 |
| Santa Clara County [CA] | 4,068 | 868 | 1,405 | 419 |
| Palm Beach County [FL] | 2,198 | 531 | 1,011 | 330 |
| Kings County [NY] | 1,951 | 429 | 1,015 | 278 |
| Queens County [NY] | 1,617 | 549 | 487 | 238 |
| New York County [NY] | 1,261 | 526 | 446 | 258 |
| Bergen County [NJ] | 1,183 | 471 | 572 | 243 |
| Bronx County [NY] | 934 | 311 | 502 | 230 |
| Orange County [CA] | 928 | 264 | 334 | 149 |
| Harris County [TX] | 914 | 367 | 384 | 243 |
| Santa Barbara County [CA] | 829 | 435 | 662 | 367 |
| Passaic County [NJ] | 826 | 290 | 336 | 140 |
| San Bernardino County [CA] | 797 | 303 | 245 | 136 |
| Hennepin County [MN] | 757 | 222 | 308 | 174 |
| Riverside County [CA] | 753 | 326 | 246 | 162 |
| Multnomah County [OR] | 716 | 338 | 282 | 150 |
| Alameda County [CA] | 705 | 331 | 414 | 277 |
| Westchester County [NY] | 684 | 268 | 147 | 96 |
| King County [WA] | 677 | 227 | 234 | 150 |
| DeKalb County [GA] | 675 | 448 | 397 | 314 |
| Wayne County [MI] | 656 | 256 | 333 | 179 |
| Clark County [NV] | 615 | 255 | 260 | 188 |
| Monterey County [CA] | 596 | 385 | 553 | 383 |
| Snohomish County [WA] | 514 | 462 | 176 | 247 |
| DuPage County [IL] | 476 | 235 | 220 | 139 |
| Fairfax County [VA] | 475 | 259 | 98 | 89 |
| San Francisco County [CA] | 473 | 233 | 282 | 210 |
| District of Columbia [DC] | 466 | 158 | 114 | 84 |
| Salt Lake County [UT] | 462 | 108 | 74 | 54 |
| Worcester County [MA] | 452 | 146 | 129 | 68 |
| Middlesex County [MA] | 445 | 162 | 101 | 68 |
| Suffolk County [NY] | 430 | 225 | 134 | 157 |
| Ventura County [CA] | 414 | 258 | 260 | 222 |
| Contra Costa County [CA] | 379 | 217 | 56 | 46 |
| Fairfield County [CT] | 375 | 153 | 104 | 67 |
| San Mateo County [CA] | 370 | 147 | 64 | 43 |
| Norfolk County [MA] | 370 | 276 | 170 | 173 |
| Somerset County [NJ] | 369 | 302 | 117 | 105 |
| Dallas County [TX] | 345 | 130 | 119 | 62 |
| Lake County [IL] | 323 | 122 | 58 | 45 |
| Wake County [NC] | 320 | 199 | 78 | 87 |
| Broward County [FL] | 302 | 154 | 29 | 47 |
| Hartford County [CT] | 301 | 103 | 68 | 44 |
| Kane County [IL] | 300 | 228 | 68 | 64 |
| Morris County [NJ] | 298 | 180 | 89 | 86 |
| Erie County [NY] | 296 | 193 | 172 | 157 |
| Sacramento County [CA] | 291 | 178 | 122 | 100 |
| Montgomery County [MD] | 287 | 160 | 35 | 30 |
| Fresno County [CA] | 285 | 133 | 190 | 110 |
| Philadelphia County [PA] | 279 | 113 | 171 | 78 |
| Prince William County [VA] | 278 | 182 | 74 | 54 |
| Nassau County [NY] | 265 | 139 | 58 | 40 |
| Arlington County [VA] | 264 | 162 | 46 | 65 |
| Hillsborough County [NH] | 260 | 163 | 69 | 94 |
| Tarrant County [TX] | 258 | 165 | 32 | 27 |
| Providence County [RI] | 247 | 121 | 116 | 87 |
| San Joaquin County [CA] | 237 | 169 | 29 | 28 |
| Gwinnett County [GA] | 237 | 260 | 10 | 16 |
| Essex County [NJ] | 233 | 127 | 82 | 70 |
| Pima County [AZ] | 221 | 126 | 53 | 56 |
| Pierce County [WA] | 220 | 124 | (B) | - |
| Baltimore County [MD] | 217 | 175 | 98 | 85 |
| Clark County [WA] | 214 | 95 | 16 | 17 |
| Kern County [CA] | 206 | 113 | 53 | 42 |
| Hamilton County [OH] | 204 | 187 | 113 | 136 |
| Suffolk County [MA] | 203 | 110 | 81 | 95 |
| Hudson County [NJ] | 203 | 107 | 137 | 80 |
| Franklin County [OH] | 203 | 174 | 94 | 143 |
| Miami-Dade County [FL] | 201 | 137 | 50 | 55 |
| St. Louis County [MO] | 191 | 120 | 28 | 43 |
| Lee County [FL] | 186 | 94 | 103 | 70 |
| Ramsey County [MN] | 185 | 85 | 38 | 29 |
| Washtenaw County [MI] | 183 | 80 | 58 | 45 |
| Washington County [OR] | 171 | 93 | 23 | 28 |
| Placer County [CA] | 169 | 155 | 91 | 128 |
| Loudoun County [VA] | 166 | 113 | 11 | 21 |
| Burlington County [NJ] | 154 | 85 | 63 | 74 |
| Mecklenburg County [NC] | 152 | 144 | 17 | 28 |
| Denton County [TX] | 151 | 126 | 1 | 4 |
| Washoe County [NV] | 149 | 89 | 54 | 54 |
| Henrico County [VA] | 147 | 184 | 118 | 182 |
| Middlesex County [NJ] | 146 | 85 | 5 | 10 |
| Milwaukee County [WI] | 145 | 104 | 33 | 42 |
| Sonoma County [CA] | 144 | 110 | 28 | 37 |
| Monmouth County [NJ] | 143 | 67 | 61 | 50 |
| Davidson County [TN] | 143 | 125 | 40 | 80 |
| Onondaga County [NY] | 131 | 85 | 58 | 55 |
| Bucks County [PA] | 128 | 84 | 47 | 47 |
| Orange County [FL] | 124 | 82 | 46 | 49 |
| Anne Arundel County [MD] | 123 | 100 | 37 | 55 |
| Cuyahoga County [OH] | 121 | 67 | 21 | 23 |
| Orange County [NY] | 120 | 91 | 70 | 96 |
| New Castle County [DE] | 119 | 73 | 6 | 11 |
| Bristol County [MA] | 118 | 96 | 19 | 25 |
| Anchorage Municipality [AK] | 116 | 64 | 32 | 39 |
| Ocean County [NJ] | 112 | 115 | 90 | 87 |
| Bexar County [TX] | 112 | 88 | 18 | 22 |
| Collier County [FL] | 109 | 74 | 33 | 34 |
| Polk County [IA] | 109 | 80 | 9 | 15 |
| Denver County [CO] | 105 | 69 | 26 | 41 |
| Prince George s County [MD] | 102 | 56 | 63 | 46 |
| Fulton County [GA] | 99 | 80 | 18 | 25 |
| Chester County [PA] | 98 | 86 | (B) | - |
| Travis County [TX] | 97 | 86 | (B) | - |
| Marion County [IN] | 96 | 61 | (B) | - |
| Solano County [CA] | 95 | 49 | 11 | 18 |
| Yolo County [CA] | 95 | 81 | 13 | 22 |
| Union County [NJ] | 95 | 78 | 69 | 75 |
| Honolulu County [HI] | 94 | 56 | 10 | 16 |
| Will County [IL] | 94 | 54 | 21 | 27 |
| Cobb County [GA] | 90 | 72 | (B) | - |
| Dane County [WI] | 87 | 52 | (B) | - |
| Jefferson County [KY] | 86 | 60 | 18 | 21 |
| Fort Bend County [TX] | 86 | 115 | (B) | - |
| Maui County [HI] | 81 | 65 | (B) | - |
| Dakota County [MN] | 80 | 44 | 18 | 21 |
| Delaware County [PA] | 76 | 61 | 23 | 30 |
| Collin County [TX] | 76 | 66 | 16 | 32 |
| Guilford County [NC] | 75 | 84 | 46 | 79 |
| Hillsborough County [FL] | 72 | 54 | 13 | 26 |
| Richmond County [NY] | 71 | 87 | 32 | 51 |
| Rockland County [NY] | 70 | 81 | 12 | 21 |
| Montgomery County [PA] | 69 | 49 | (B) | - |
| Pinellas County [FL] | 68 | 48 | 11 | 17 |
| Hampden County [MA] | 68 | 55 | 17 | 22 |
| Arapahoe County [CO] | 64 | 64 | 34 | 54 |
| Jefferson Parish [LA] | 62 | 42 | (B) | - |
| Allegheny County [PA] | 62 | 58 | 13 | 21 |
| Baltimore city [MD] | 61 | 46 | 34 | 34 |
| Virginia Beach city [VA] | 60 | 59 | 9 | 14 |
| Camden County [NJ] | 59 | 50 | 26 | 39 |
| Duval County [FL] | 52 | 47 | 10 | 19 |
| Mercer County [NJ] | 52 | 36 | 11 | 17 |
| Monroe County [NY] | 51 | 68 | 39 | 65 |
| New Haven County [CT] | 49 | 38 | 13 | 20 |
| El Paso County [CO] | 44 | 47 | 11 | 17 |
| Essex County [MA] | 44 | 36 | (B) | - |
| Bernalillo County [NM] | 43 | 36 | 10 | 14 |
| Oklahoma County [OK] | 43 | 32 | (B) | - |
| Johnson County [KS] | 39 | 38 | (B) | - |
| Howard County [MD] | 34 | 40 | (B) | - |
| Atlantic County [NJ] | 32 | 48 | 32 | 48 |
| Shelby County [TN] | 29 | 27 | 9 | 15 |
| Hawaii County [HI] | 27 | 27 | (B) | - |
| Plymouth County [MA] | 26 | 24 | 9 | 15 |
| Navajo County [AZ] | 19 | 24 | 19 | 24 |
| San Juan County [NM] | 16 | 25 | (B) | - |
| Albany County [NY] | 11 | 16 | 9 | 15 |
| City / Metropolitan area / CBSA | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Detroit-Warren-Dearborn [MI] | 23,828 | 1,936 | 11,327 | 1,167 |
| Chicago-Naperville-Elgin [IL-IN] | 15,444 | 1,944 | 6,322 | 1,032 |
| San Diego-Carlsbad [CA] | 11,697 | 1,585 | 5,978 | 989 |
| New York-Newark-Jersey City [NY] | 11,307 | 1,269 | 4,536 | 682 |
| Modesto [CA] | 8,089 | 1,139 | 3,372 | 542 |
| Los Angeles-Long Beach-Anaheim [CA] | 6,367 | 797 | 2,400 | 397 |
| Phoenix-Mesa-Scottsdale [AZ] | 4,842 | 1,061 | 2,353 | 634 |
| San Jose-Sunnyvale-Santa Clara [CA] | 4,068 | 868 | 1,405 | 419 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 2,701 | 537 | 1,090 | 332 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 2,196 | 487 | 450 | 167 |
| San Francisco-Oakland-Hayward [CA] | 2,034 | 419 | 876 | 325 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 1,621 | 309 | 469 | 176 |
| Riverside-San Bernardino-Ontario [CA] | 1,550 | 452 | 491 | 206 |
| Seattle-Tacoma-Bellevue [WA] | 1,411 | 459 | 410 | 235 |
| Portland-Vancouver-Hillsboro [OR-WA] | 1,389 | 383 | 386 | 176 |
| Boston-Cambridge-Newton [MA-NH] | 1,319 | 366 | 361 | 212 |
| Atlanta-Sandy Springs-Roswell [GA] | 1,216 | 518 | 425 | 311 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 1,020 | 214 | 336 | 126 |
| Houston-The Woodlands-Sugar Land [TX] | 1,017 | 387 | 384 | 243 |
| Dallas-Fort Worth-Arlington [TX] | 905 | 257 | 181 | 76 |
| Santa Maria-Santa Barbara [CA] | 829 | 435 | 662 | 367 |
| Cincinnati [OH-KY-IN] | 668 | 324 | 223 | 158 |
| Sacramento-Roseville-Arden-Arcade [CA] | 656 | 276 | 226 | 157 |
| Las Vegas-Henderson-Paradise [NV] | 615 | 255 | 260 | 188 |
| Salinas [CA] | 596 | 385 | 553 | 383 |
| Salt Lake City [UT] | 544 | 115 | 111 | 67 |
| Omaha-Council Bluffs [NE-IA] | 520 | 377 | 417 | 377 |
| Baltimore-Columbia-Towson [MD] | 505 | 234 | 169 | 110 |
| Providence-Warwick [RI-MA] | 491 | 160 | 163 | 96 |
| Worcester [MA-CT] | 475 | 147 | 137 | 68 |
| Oxnard-Thousand Oaks-Ventura [CA] | 414 | 258 | 260 | 222 |
| Denver-Aurora-Lakewood [CO] | 409 | 179 | 107 | 80 |
| Bridgeport-Stamford-Norwalk [CT] | 375 | 153 | 104 | 67 |
| Grand Rapids-Wyoming [MI] | 369 | 158 | 116 | 76 |
| Lansing-East Lansing [MI] | 355 | 288 | 231 | 278 |
| St. Louis [MO-IL] | 336 | 129 | 36 | 45 |
| Hartford-West Hartford-East Hartford [CT] | 331 | 106 | 68 | 44 |
| Richmond [VA] | 325 | 234 | 203 | 200 |
| Raleigh [NC] | 320 | 199 | 78 | 87 |
| New York-Newark-Jersey City [NY-NJ-PA] | 307 | 198 | 96 | 90 |
| Columbus [OH] | 302 | 204 | 141 | 154 |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 300 | 201 | 89 | 103 |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 296 | 193 | 172 | 157 |
| Fresno [CA] | 285 | 133 | 190 | 110 |
| Manchester-Nashua [NH] | 260 | 163 | 69 | 94 |
| Charlotte-Concord-Gastonia [NC-SC] | 256 | 157 | 35 | 41 |
| Stockton-Lodi [CA] | 237 | 169 | 29 | 28 |
| Tampa-St. Petersburg-Clearwater [FL] | 229 | 100 | 91 | 68 |
| Tucson [AZ] | 221 | 126 | 53 | 56 |
| Cleveland-Elyria [OH] | 211 | 83 | 62 | 38 |
| Milwaukee-Waukesha-West Allis [WI] | 211 | 120 | 61 | 50 |
| Bakersfield [CA] | 206 | 113 | 53 | 42 |
| Cape Coral-Fort Myers [FL] | 186 | 94 | 103 | 70 |
| Ann Arbor [MI] | 183 | 80 | 58 | 45 |
| Oklahoma City [OK] | 172 | 97 | 24 | 20 |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 171 | 96 | 23 | 25 |
| Austin-Round Rock [TX] | 169 | 108 | 22 | 31 |
| Orlando-Kissimmee-Sanford [FL] | 164 | 92 | 78 | 67 |
| Albany-Schenectady-Troy [NY] | 160 | 154 | 138 | 149 |
| Reno [NV] | 149 | 89 | 54 | 54 |
| Rochester [NY] | 149 | 112 | 39 | 65 |
| San Antonio-New Braunfels [TX] | 144 | 99 | 18 | 22 |
| Santa Rosa [CA] | 144 | 110 | 28 | 37 |
| Syracuse [NY] | 142 | 86 | 58 | 55 |
| Memphis [TN-MS-AR] | 140 | 133 | 49 | 58 |
| Kansas City [MO-KS] | 136 | 67 | 3 | 6 |
| Indianapolis-Carmel-Anderson [IN] | 134 | 76 | 25 | 38 |
| New Orleans-Metairie [LA] | 125 | 64 | 34 | 33 |
| Anchorage [AK] | 121 | 64 | 32 | 39 |
| Louisville Jefferson County [KY] | 111 | 68 | 18 | 21 |
| Des Moines-West Des Moines [IA] | 109 | 80 | 9 | 15 |
| Naples-Immokalee-Marco Island [FL] | 109 | 74 | 33 | 34 |
| Durham-Chapel Hill [NC] | 108 | 71 | 58 | 58 |
| Baton Rouge [LA] | 106 | 74 | (B) | - |
| Tulsa [OK] | 103 | 61 | 45 | 52 |
| Vallejo-Fairfield [CA] | 95 | 49 | 11 | 18 |
| Urban Honolulu [HI] | 94 | 56 | 10 | 16 |
| Harrisburg-Carlisle [PA] | 92 | 70 | 55 | 57 |
| Portland-South Portland [ME] | 90 | 71 | 20 | 27 |
| Madison [WI] | 87 | 52 | (B) | - |
| Jacksonville [FL] | 84 | 60 | 21 | 28 |
| Albuquerque [NM] | 83 | 47 | 10 | 14 |
| Kahului-Wailuku-Lahaina [HI] | 81 | 65 | (B) | - |
| Greensboro-High Point [NC] | 76 | 84 | 46 | 79 |
| Springfield [MA] | 76 | 56 | 21 | 23 |
| Pittsburgh [PA] | 72 | 59 | 14 | 21 |
| Trenton [NJ] | 52 | 36 | 11 | 17 |
| New Haven-Milford [CT] | 49 | 38 | 13 | 20 |
| Colorado Springs [CO] | 44 | 47 | 11 | 17 |
| Allentown-Bethlehem-Easton [PA-NJ] | 40 | 37 | 6 | 7 |
| Akron [OH] | 33 | 33 | (B) | - |
| Deltona-Daytona Beach-Ormond Beach [FL] | 33 | 38 | (B) | - |
| Atlantic City-Hammonton [NJ] | 32 | 48 | 32 | 48 |
| Hilo [HI] | 27 | 27 | (B) | - |
| Show Low [AZ] | 19 | 24 | 19 | 24 |
| Farmington [NM] | 16 | 25 | (B) | - |
| Spokane-Spokane Valley [WA] | 15 | 23 | (B) | - |
| Dayton [OH] | 8 | 17 | 8 | 17 |
| Lafayette [LA] | 6 | 10 | (B) | - |