| Country | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| United States | 141,580 | 3,609 | 25,030 | 1,466 |
| State | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| California | 22,335 | 1,359 | 2,865 | 385 |
| Ohio | 12,160 | 1,355 | 4,255 | 799 |
| New York | 10,840 | 900 | 1,775 | 303 |
| Pennsylvania | 10,635 | 1,174 | 3,105 | 538 |
| Florida | 10,360 | 1,189 | 1,305 | 354 |
| Indiana | 7,950 | 727 | 2,595 | 465 |
| Michigan | 5,710 | 560 | 1,035 | 210 |
| Texas | 5,395 | 781 | 510 | 153 |
| Illinois | 3,440 | 440 | 515 | 183 |
| Washington | 3,420 | 504 | 520 | 158 |
| Massachusetts | 3,365 | 558 | 295 | 182 |
| Missouri | 3,085 | 716 | 745 | 215 |
| Wisconsin | 3,040 | 332 | 695 | 158 |
| New Jersey | 3,020 | 501 | 295 | 132 |
| Georgia | 2,795 | 452 | 240 | 129 |
| Virginia | 2,760 | 442 | 315 | 137 |
| Arizona | 2,145 | 387 | 260 | 113 |
| Oregon | 2,080 | 285 | 195 | 84 |
| Colorado | 2,065 | 345 | 160 | 72 |
| Maryland | 2,040 | 334 | 110 | 66 |
| North Carolina | 2,020 | 456 | 115 | 59 |
| Connecticut | 1,825 | 404 | 170 | 109 |
| Kentucky | 1,790 | 462 | 570 | 237 |
| Utah | 1,735 | 372 | 225 | 102 |
| Iowa | 1,630 | 323 | 200 | 89 |
| Minnesota | 1,315 | 212 | 170 | 54 |
| Tennessee | 1,290 | 369 | 150 | 106 |
| Kansas | 1,015 | 242 | 180 | 99 |
| Nevada | 945 | 209 | 170 | 96 |
| Arkansas | 890 | 441 | 100 | 94 |
| South Carolina | 870 | 234 | 75 | 56 |
| Alabama | 725 | 269 | 85 | 61 |
| Delaware | 695 | 292 | 290 | 161 |
| Oklahoma | 685 | 232 | 80 | 63 |
| Idaho | 665 | 171 | 160 | 84 |
| New Mexico | 590 | 220 | (D) | (D) |
| Montana | 580 | 189 | 55 | 54 |
| Hawaii | 445 | 119 | 25 | 19 |
| Maine | 435 | 168 | 105 | 86 |
| New Hampshire | 405 | 127 | 90 | 64 |
| Louisiana | 395 | 152 | 25 | 26 |
| Vermont | 375 | 113 | 50 | 41 |
| Nebraska | 335 | 128 | 55 | 40 |
| South Dakota | 240 | 95 | 25 | 19 |
| Mississippi | 215 | 119 | (B) | - |
| Alaska | 205 | 68 | (D) | (D) |
| District of Columbia | 205 | 90 | (B) | - |
| West Virginia | 165 | 95 | (B) | - |
| Rhode Island | 150 | 89 | (D) | (D) |
| Wyoming | 70 | 56 | (B) | - |
| Puerto Rico | 40 | 42 | (B) | - |
| North Dakota | 30 | 32 | (B) | - |
| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Los Angeles County [CA] | 4,710 | 605 | 790 | 200 |
| Lancaster County [PA] | 3,190 | 712 | 990 | 301 |
| Orange County [CA] | 2,695 | 469 | 390 | 129 |
| New York County [NY] | 1,870 | 397 | 270 | 131 |
| San Diego County [CA] | 1,860 | 351 | 180 | 93 |
| Harris County [TX] | 1,695 | 442 | 105 | 83 |
| Cook County [IL] | 1,550 | 307 | 265 | 128 |
| Riverside County [CA] | 1,475 | 352 | 220 | 100 |
| Miami-Dade County [FL] | 1,460 | 533 | 270 | 164 |
| Santa Clara County [CA] | 1,455 | 294 | 115 | 77 |
| King County [WA] | 1,295 | 303 | 185 | 97 |
| Kings County [NY] | 1,290 | 297 | 335 | 111 |
| Broward County [FL] | 1,270 | 395 | 110 | 105 |
| Maricopa County [AZ] | 1,220 | 269 | 160 | 94 |
| Alameda County [CA] | 1,005 | 256 | 100 | 69 |
| Fairfax County [VA] | 975 | 247 | 75 | 69 |
| San Bernardino County [CA] | 955 | 223 | 170 | 85 |
| Salt Lake County [UT] | 905 | 214 | 170 | 95 |
| Queens County [NY] | 895 | 245 | 180 | 111 |
| Palm Beach County [FL] | 890 | 308 | 175 | 96 |
| Middlesex County [MA] | 865 | 231 | 85 | 45 |
| Fairfield County [CT] | 860 | 278 | 90 | 77 |
| Westchester County [NY] | 860 | 322 | 55 | 68 |
| Chester County [PA] | 810 | 355 | 335 | 266 |
| Contra Costa County [CA] | 800 | 203 | 60 | 47 |
| Orange County [FL] | 750 | 260 | (D) | (D) |
| Clark County [NV] | 710 | 170 | 155 | 97 |
| Sacramento County [CA] | 705 | 272 | 65 | 51 |
| San Mateo County [CA] | 680 | 225 | 60 | 42 |
| Suffolk County [MA] | 665 | 379 | 130 | 165 |
| Fulton County [GA] | 585 | 246 | 30 | 36 |
| Montgomery County [MD] | 585 | 210 | 50 | 56 |
| Gwinnett County [GA] | 580 | 342 | 60 | 86 |
| Pinellas County [FL] | 525 | 201 | (D) | (D) |
| San Francisco County [CA] | 520 | 180 | 35 | 35 |
| Ventura County [CA] | 510 | 142 | 45 | 33 |
| Wayne County [MI] | 495 | 213 | 70 | 48 |
| Bronx County [NY] | 460 | 203 | 50 | 44 |
| Multnomah County [OR] | 450 | 156 | (D) | (D) |
| Santa Barbara County [CA] | 440 | 148 | 25 | 29 |
| Wake County [NC] | 420 | 189 | (B) | - |
| Suffolk County [NY] | 405 | 121 | (D) | (D) |
| Norfolk County [MA] | 395 | 157 | (D) | (D) |
| Sonoma County [CA] | 380 | 200 | 95 | 92 |
| Hennepin County [MN] | 380 | 134 | 20 | 20 |
| St. Louis County [MO] | 370 | 166 | (D) | (D) |
| Macomb County [MI] | 355 | 128 | 145 | 99 |
| Snohomish County [WA] | 355 | 123 | 60 | 48 |
| Lee County [FL] | 350 | 145 | 95 | 80 |
| Worcester County [MA] | 350 | 163 | (D) | (D) |
| Washington County [OR] | 350 | 164 | 50 | 40 |
| Bergen County [NJ] | 345 | 141 | (B) | - |
| Pima County [AZ] | 340 | 150 | (B) | - |
| Lake County [IL] | 335 | 134 | 40 | 38 |
| Fresno County [CA] | 325 | 138 | 35 | 39 |
| San Joaquin County [CA] | 325 | 131 | 40 | 44 |
| Monroe County [NY] | 325 | 132 | 60 | 48 |
| New Haven County [CT] | 320 | 165 | 70 | 63 |
| Baltimore city [MD] | 320 | 168 | (B) | - |
| Delaware County [PA] | 320 | 181 | (B) | - |
| Ocean County [NJ] | 315 | 151 | 60 | 60 |
| Nassau County [NY] | 310 | 140 | (D) | (D) |
| Cobb County [GA] | 305 | 138 | 85 | 87 |
| Denton County [TX] | 305 | 159 | 55 | 45 |
| Duval County [FL] | 300 | 109 | 30 | 34 |
| Hillsborough County [FL] | 295 | 120 | 50 | 39 |
| Essex County [MA] | 295 | 131 | (D) | (D) |
| Placer County [CA] | 265 | 125 | 50 | 51 |
| Somerset County [NJ] | 260 | 193 | (D) | (D) |
| Montgomery County [PA] | 260 | 109 | (D) | (D) |
| DuPage County [IL] | 245 | 116 | (D) | (D) |
| Allegheny County [PA] | 240 | 128 | (D) | (D) |
| Tarrant County [TX] | 240 | 125 | (D) | (D) |
| Hudson County [NJ] | 235 | 173 | (B) | - |
| Franklin County [OH] | 230 | 120 | 30 | 23 |
| Pierce County [WA] | 230 | 95 | 45 | 45 |
| Stanislaus County [CA] | 225 | 92 | 50 | 38 |
| Morris County [NJ] | 225 | 108 | 25 | 35 |
| Cuyahoga County [OH] | 225 | 90 | 35 | 32 |
| Prince George s County [MD] | 220 | 130 | (D) | (D) |
| Dallas County [TX] | 220 | 102 | (D) | (D) |
| Hawaii County [HI] | 215 | 77 | 10 | 10 |
| Travis County [TX] | 215 | 98 | 40 | 37 |
| District of Columbia [DC] | 205 | 90 | (B) | - |
| Arapahoe County [CO] | 200 | 96 | 30 | 24 |
| Hartford County [CT] | 200 | 86 | (B) | - |
| Anne Arundel County [MD] | 200 | 104 | 35 | 29 |
| Monmouth County [NJ] | 200 | 107 | (D) | (D) |
| Dane County [WI] | 200 | 117 | (D) | (D) |
| Bucks County [PA] | 195 | 125 | 25 | 23 |
| Milwaukee County [WI] | 195 | 122 | (D) | (D) |
| El Paso County [CO] | 185 | 86 | (D) | (D) |
| Honolulu County [HI] | 185 | 89 | (D) | (D) |
| Marion County [IN] | 185 | 87 | 30 | 29 |
| Bexar County [TX] | 185 | 92 | (D) | (D) |
| Clark County [WA] | 185 | 92 | 40 | 40 |
| Camden County [NJ] | 180 | 119 | (B) | - |
| Passaic County [NJ] | 180 | 92 | 40 | 48 |
| Philadelphia County [PA] | 175 | 90 | (B) | - |
| Loudoun County [VA] | 175 | 106 | (B) | - |
| Monterey County [CA] | 170 | 114 | (D) | (D) |
| Plymouth County [MA] | 170 | 118 | (B) | - |
| Washtenaw County [MI] | 170 | 75 | (D) | (D) |
| Bernalillo County [NM] | 170 | 74 | (D) | (D) |
| Hamilton County [OH] | 170 | 85 | (D) | (D) |
| Collin County [TX] | 170 | 87 | (D) | (D) |
| Virginia Beach city [VA] | 165 | 99 | 25 | 33 |
| Denver County [CO] | 160 | 85 | (B) | - |
| DeKalb County [GA] | 160 | 97 | (B) | - |
| Kane County [IL] | 160 | 124 | 30 | 41 |
| Baltimore County [MD] | 160 | 96 | (B) | - |
| Oakland County [MI] | 160 | 71 | 30 | 34 |
| Mercer County [NJ] | 155 | 104 | (D) | (D) |
| Essex County [NJ] | 150 | 110 | (D) | (D) |
| Mecklenburg County [NC] | 150 | 94 | (D) | (D) |
| Yolo County [CA] | 145 | 74 | (B) | - |
| Jefferson County [KY] | 145 | 96 | (B) | - |
| Washoe County [NV] | 145 | 90 | (D) | (D) |
| Will County [IL] | 140 | 76 | (D) | (D) |
| Solano County [CA] | 135 | 107 | (D) | (D) |
| Atlantic County [NJ] | 135 | 169 | (B) | - |
| Collier County [FL] | 130 | 67 | (D) | (D) |
| Albany County [NY] | 130 | 139 | (D) | (D) |
| Orange County [NY] | 130 | 72 | (D) | (D) |
| Guilford County [NC] | 130 | 81 | 50 | 54 |
| Shelby County [TN] | 130 | 83 | (B) | - |
| Hillsborough County [NH] | 125 | 66 | 35 | 39 |
| Kern County [CA] | 120 | 79 | (D) | (D) |
| Union County [NJ] | 115 | 60 | (D) | (D) |
| Anchorage Municipality [AK] | 110 | 61 | (B) | - |
| New Castle County [DE] | 110 | 68 | (D) | (D) |
| Erie County [NY] | 110 | 76 | (D) | (D) |
| Richmond County [NY] | 110 | 70 | (B) | - |
| Arlington County [VA] | 110 | 68 | (D) | (D) |
| Hampden County [MA] | 105 | 71 | (D) | (D) |
| Bristol County [MA] | 100 | 77 | (B) | - |
| Middlesex County [NJ] | 95 | 53 | (D) | (D) |
| Davidson County [TN] | 95 | 94 | (D) | (D) |
| Johnson County [KS] | 90 | 53 | (D) | (D) |
| Burlington County [NJ] | 90 | 77 | (D) | (D) |
| Fort Bend County [TX] | 90 | 56 | (D) | (D) |
| Howard County [MD] | 85 | 65 | (B) | - |
| Onondaga County [NY] | 85 | 54 | (B) | - |
| Providence County [RI] | 80 | 65 | (D) | (D) |
| Prince William County [VA] | 75 | 83 | (B) | - |
| Ramsey County [MN] | 70 | 49 | (B) | - |
| Polk County [IA] | 55 | 45 | 25 | 21 |
| Henrico County [VA] | 50 | 45 | (B) | - |
| Rockland County [NY] | 45 | 37 | (B) | - |
| Maui County [HI] | 40 | 34 | (B) | - |
| Oklahoma County [OK] | 30 | 31 | (B) | - |
| Jefferson Parish [LA] | 25 | 25 | (B) | - |
| Dakota County [MN] | 10 | 9 | (D) | (D) |
| 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] | 8,895 | 732 | 1,200 | 269 |
| Los Angeles-Long Beach-Anaheim [CA] | 7,400 | 814 | 1,180 | 266 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 3,625 | 747 | 560 | 248 |
| San Francisco-Oakland-Hayward [CA] | 3,385 | 523 | 305 | 120 |
| Lancaster [PA] | 3,190 | 712 | 990 | 301 |
| Chicago-Naperville-Elgin [IL-IN] | 2,775 | 401 | 475 | 178 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 2,700 | 430 | 205 | 104 |
| Boston-Cambridge-Newton [MA-NH] | 2,515 | 519 | 285 | 179 |
| Riverside-San Bernardino-Ontario [CA] | 2,425 | 430 | 390 | 119 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 2,380 | 505 | 405 | 265 |
| Houston-The Woodlands-Sugar Land [TX] | 2,360 | 584 | 160 | 104 |
| Atlanta-Sandy Springs-Roswell [GA] | 2,155 | 420 | 210 | 130 |
| Grand Rapids-Wyoming [MI] | 1,915 | 351 | 310 | 112 |
| Seattle-Tacoma-Bellevue [WA] | 1,885 | 358 | 295 | 114 |
| San Diego-Carlsbad [CA] | 1,860 | 351 | 180 | 93 |
| San Jose-Sunnyvale-Santa Clara [CA] | 1,525 | 289 | 115 | 77 |
| Phoenix-Mesa-Scottsdale [AZ] | 1,305 | 268 | 160 | 94 |
| Orlando-Kissimmee-Sanford [FL] | 1,235 | 305 | 95 | 72 |
| Sacramento-Roseville-Arden-Arcade [CA] | 1,215 | 311 | 115 | 70 |
| Portland-Vancouver-Hillsboro [OR-WA] | 1,205 | 231 | 120 | 57 |
| Tampa-St. Petersburg-Clearwater [FL] | 1,205 | 364 | 105 | 66 |
| Detroit-Warren-Dearborn [MI] | 1,170 | 297 | 280 | 114 |
| Dallas-Fort Worth-Arlington [TX] | 1,075 | 244 | 120 | 73 |
| New York-Newark-Jersey City [NY-NJ-PA] | 920 | 251 | 90 | 93 |
| Salt Lake City [UT] | 905 | 214 | 170 | 95 |
| Bridgeport-Stamford-Norwalk [CT] | 860 | 278 | 90 | 77 |
| Baltimore-Columbia-Towson [MD] | 830 | 218 | 35 | 29 |
| Rochester [NY] | 825 | 202 | 235 | 112 |
| Denver-Aurora-Lakewood [CO] | 800 | 192 | 60 | 40 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 760 | 176 | 75 | 38 |
| Las Vegas-Henderson-Paradise [NV] | 710 | 170 | 155 | 97 |
| Cleveland-Elyria [OH] | 695 | 265 | 165 | 92 |
| St. Louis [MO-IL] | 615 | 206 | 55 | 63 |
| Columbus [OH] | 605 | 243 | 90 | 68 |
| Indianapolis-Carmel-Anderson [IN] | 540 | 194 | 65 | 47 |
| Oxnard-Thousand Oaks-Ventura [CA] | 510 | 142 | 45 | 33 |
| Raleigh [NC] | 465 | 193 | (B) | - |
| Allentown-Bethlehem-Easton [PA-NJ] | 440 | 125 | 85 | 67 |
| Milwaukee-Waukesha-West Allis [WI] | 440 | 146 | 65 | 66 |
| Santa Maria-Santa Barbara [CA] | 440 | 148 | 25 | 29 |
| Austin-Round Rock [TX] | 430 | 135 | 75 | 48 |
| Charlotte-Concord-Gastonia [NC-SC] | 395 | 156 | (D) | (D) |
| Jacksonville [FL] | 385 | 126 | 35 | 35 |
| Santa Rosa [CA] | 380 | 200 | 95 | 92 |
| Durham-Chapel Hill [NC] | 370 | 309 | (B) | - |
| Pittsburgh [PA] | 370 | 126 | 35 | 40 |
| San Antonio-New Braunfels [TX] | 365 | 181 | (D) | (D) |
| Albany-Schenectady-Troy [NY] | 350 | 149 | 65 | 56 |
| Cape Coral-Fort Myers [FL] | 350 | 145 | 95 | 80 |
| Hartford-West Hartford-East Hartford [CT] | 350 | 125 | (B) | - |
| Worcester [MA-CT] | 350 | 163 | (D) | (D) |
| Harrisburg-Carlisle [PA] | 345 | 93 | 85 | 44 |
| Cincinnati [OH-KY-IN] | 340 | 122 | 40 | 37 |
| Madison [WI] | 340 | 166 | 45 | 36 |
| Tucson [AZ] | 340 | 150 | (B) | - |
| Fresno [CA] | 325 | 138 | 35 | 39 |
| Stockton-Lodi [CA] | 325 | 131 | 40 | 44 |
| New Haven-Milford [CT] | 320 | 165 | 70 | 63 |
| Kansas City [MO-KS] | 300 | 90 | 60 | 39 |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 295 | 153 | 35 | 43 |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 275 | 124 | 35 | 37 |
| Providence-Warwick [RI-MA] | 250 | 102 | (D) | (D) |
| Spokane-Spokane Valley [WA] | 240 | 146 | (D) | (D) |
| Portland-South Portland [ME] | 235 | 128 | (D) | (D) |
| Louisville Jefferson County [KY] | 225 | 124 | (B) | - |
| Modesto [CA] | 225 | 92 | 50 | 38 |
| Deltona-Daytona Beach-Ormond Beach [FL] | 220 | 132 | 65 | 67 |
| New Orleans-Metairie [LA] | 220 | 128 | (B) | - |
| Richmond [VA] | 220 | 127 | (B) | - |
| Hilo [HI] | 215 | 77 | 10 | 10 |
| Akron [OH] | 210 | 125 | 55 | 69 |
| Albuquerque [NM] | 210 | 79 | (D) | (D) |
| Memphis [TN-MS-AR] | 195 | 108 | (B) | - |
| Colorado Springs [CO] | 190 | 86 | (D) | (D) |
| Springfield [MA] | 190 | 101 | (D) | (D) |
| Tulsa [OK] | 185 | 142 | (B) | - |
| Urban Honolulu [HI] | 185 | 89 | (D) | (D) |
| Ann Arbor [MI] | 170 | 75 | (D) | (D) |
| Oklahoma City [OK] | 170 | 117 | (D) | (D) |
| Salinas [CA] | 170 | 114 | (D) | (D) |
| Omaha-Council Bluffs [NE-IA] | 155 | 83 | (D) | (D) |
| Syracuse [NY] | 155 | 73 | 30 | 29 |
| Trenton [NJ] | 155 | 104 | (D) | (D) |
| Greensboro-High Point [NC] | 145 | 84 | 50 | 54 |
| Reno [NV] | 145 | 90 | (D) | (D) |
| Anchorage [AK] | 140 | 64 | (B) | - |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 140 | 82 | (D) | (D) |
| Atlantic City-Hammonton [NJ] | 135 | 169 | (B) | - |
| Vallejo-Fairfield [CA] | 135 | 107 | (D) | (D) |
| Naples-Immokalee-Marco Island [FL] | 130 | 67 | (D) | (D) |
| Manchester-Nashua [NH] | 125 | 66 | 35 | 39 |
| Bakersfield [CA] | 120 | 79 | (D) | (D) |
| Dayton [OH] | 110 | 59 | (D) | (D) |
| Lansing-East Lansing [MI] | 90 | 46 | (D) | (D) |
| Des Moines-West Des Moines [IA] | 85 | 50 | 30 | 22 |
| Baton Rouge [LA] | 50 | 44 | (D) | (D) |
| Kahului-Wailuku-Lahaina [HI] | 40 | 34 | (B) | - |