| County | Number of speakers | Margin of Error | Speak English less than "Very Well" | Margin of Error |
| Bronx County [NY] | 23,775 | 2,192 | 6,585 | 894 |
| Prince George s County [MD] | 13,410 | 1,211 | 2,060 | 438 |
| Cook County [IL] | 12,400 | 1,452 | 2,840 | 752 |
| Harris County [TX] | 11,120 | 1,326 | 1,580 | 358 |
| Los Angeles County [CA] | 8,630 | 1,264 | 1,830 | 522 |
| Essex County [NJ] | 8,375 | 913 | 2,280 | 413 |
| Kings County [NY] | 8,205 | 1,147 | 2,260 | 495 |
| Queens County [NY] | 7,150 | 920 | 1,475 | 311 |
| Montgomery County [MD] | 7,045 | 991 | 1,370 | 373 |
| Fort Bend County [TX] | 6,515 | 1,371 | 1,475 | 431 |
| Prince William County [VA] | 6,060 | 1,134 | 1,040 | 340 |
| Baltimore County [MD] | 5,870 | 1,007 | 740 | 325 |
| Fairfax County [VA] | 5,555 | 1,004 | 1,410 | 403 |
| Dallas County [TX] | 5,545 | 773 | 770 | 277 |
| Worcester County [MA] | 5,115 | 843 | 1,950 | 502 |
| Franklin County [OH] | 4,590 | 765 | 1,115 | 297 |
| Tarrant County [TX] | 4,490 | 917 | 710 | 344 |
| Gwinnett County [GA] | 4,095 | 658 | 565 | 235 |
| Union County [NJ] | 3,540 | 798 | 755 | 316 |
| Cobb County [GA] | 3,415 | 780 | 255 | 163 |
| Philadelphia County [PA] | 3,370 | 697 | 625 | 273 |
| Hennepin County [MN] | 3,030 | 539 | 730 | 215 |
| Hartford County [CT] | 2,965 | 594 | 760 | 324 |
| Collin County [TX] | 2,815 | 818 | 495 | 239 |
| Marion County [IN] | 2,600 | 961 | 695 | 455 |
| Middlesex County [NJ] | 2,550 | 603 | 440 | 200 |
| Fulton County [GA] | 2,520 | 628 | 545 | 269 |
| DeKalb County [GA] | 2,470 | 593 | 570 | 263 |
| San Bernardino County [CA] | 2,405 | 528 | 260 | 132 |
| Providence County [RI] | 2,280 | 457 | 760 | 262 |
| Wayne County [MI] | 2,115 | 473 | 630 | 221 |
| District of Columbia [DC] | 2,080 | 432 | 360 | 144 |
| Suffolk County [MA] | 2,080 | 556 | 500 | 223 |
| Baltimore city [MD] | 1,960 | 387 | 405 | 138 |
| Howard County [MD] | 1,925 | 559 | 610 | 367 |
| Nassau County [NY] | 1,925 | 473 | 270 | 119 |
| Arapahoe County [CO] | 1,905 | 618 | 515 | 220 |
| Westchester County [NY] | 1,885 | 453 | 395 | 152 |
| Mecklenburg County [NC] | 1,860 | 445 | 330 | 166 |
| Maricopa County [AZ] | 1,820 | 601 | 375 | 197 |
| Will County [IL] | 1,760 | 653 | 205 | 124 |
| Riverside County [CA] | 1,685 | 588 | 310 | 202 |
| Richmond County [NY] | 1,620 | 386 | 205 | 117 |
| New Castle County [DE] | 1,495 | 445 | 90 | 81 |
| Middlesex County [MA] | 1,475 | 311 | 215 | 98 |
| New York County [NY] | 1,435 | 383 | 265 | 171 |
| Wake County [NC] | 1,400 | 422 | 220 | 172 |
| Alameda County [CA] | 1,355 | 359 | 265 | 144 |
| Burlington County [NJ] | 1,330 | 465 | 135 | 103 |
| Davidson County [TN] | 1,295 | 525 | 175 | 116 |
| Loudoun County [VA] | 1,275 | 323 | 150 | 88 |
| Denton County [TX] | 1,270 | 419 | 110 | 82 |
| New Haven County [CT] | 1,260 | 351 | 140 | 98 |
| Camden County [NJ] | 1,260 | 412 | 225 | 110 |
| Anne Arundel County [MD] | 1,255 | 394 | 120 | 80 |
| Miami-Dade County [FL] | 1,240 | 475 | 395 | 281 |
| Hillsborough County [FL] | 1,210 | 446 | 120 | 101 |
| Mercer County [NJ] | 1,185 | 439 | 225 | 124 |
| Broward County [FL] | 1,140 | 368 | 50 | 41 |
| Suffolk County [NY] | 1,135 | 404 | 315 | 171 |
| Sacramento County [CA] | 1,110 | 317 | 260 | 144 |
| Ramsey County [MN] | 1,105 | 319 | 260 | 103 |
| Oakland County [MI] | 1,100 | 326 | 170 | 101 |
| Contra Costa County [CA] | 1,045 | 537 | 235 | 200 |
| King County [WA] | 1,025 | 355 | 145 | 104 |
| Delaware County [PA] | 1,020 | 268 | 110 | 70 |
| Somerset County [NJ] | 995 | 433 | 180 | 107 |
| Oklahoma County [OK] | 965 | 352 | 165 | 104 |
| St. Louis County [MO] | 950 | 452 | 55 | 35 |
| Essex County [MA] | 945 | 289 | 240 | 141 |
| Bergen County [NJ] | 940 | 369 | 250 | 147 |
| San Diego County [CA] | 925 | 435 | 215 | 195 |
| Denver County [CO] | 925 | 298 | 385 | 216 |
| Bexar County [TX] | 915 | 358 | 140 | 74 |
| Hampden County [MA] | 890 | 334 | 215 | 140 |
| Norfolk County [MA] | 885 | 324 | 180 | 164 |
| Guilford County [NC] | 865 | 344 | 235 | 237 |
| Orange County [NY] | 785 | 362 | 90 | 94 |
| Montgomery County [PA] | 785 | 252 | 25 | 22 |
| Travis County [TX] | 760 | 324 | 105 | 100 |
| Fairfield County [CT] | 735 | 277 | 155 | 91 |
| Milwaukee County [WI] | 735 | 355 | 110 | 63 |
| Hamilton County [OH] | 720 | 214 | 255 | 165 |
| Dakota County [MN] | 710 | 264 | 205 | 172 |
| Albany County [NY] | 670 | 336 | 115 | 98 |
| Hudson County [NJ] | 660 | 263 | 205 | 154 |
| San Joaquin County [CA] | 650 | 316 | 110 | 118 |
| Orange County [CA] | 635 | 284 | 185 | 129 |
| Cuyahoga County [OH] | 625 | 199 | 120 | 84 |
| Orange County [FL] | 620 | 253 | 85 | 76 |
| Jefferson County [KY] | 615 | 243 | 105 | 95 |
| Salt Lake County [UT] | 595 | 295 | 150 | 99 |
| DuPage County [IL] | 575 | 216 | 85 | 60 |
| Virginia Beach city [VA] | 575 | 394 | 100 | 97 |
| Snohomish County [WA] | 570 | 232 | 125 | 85 |
| Duval County [FL] | 555 | 219 | 155 | 131 |
| Dane County [WI] | 555 | 259 | 165 | 111 |
| Clark County [NV] | 520 | 219 | 80 | 104 |
| Rockland County [NY] | 500 | 238 | 100 | 105 |
| Santa Clara County [CA] | 490 | 216 | 115 | 101 |
| Washtenaw County [MI] | 465 | 197 | 105 | 127 |
| Erie County [NY] | 455 | 192 | 80 | 72 |
| Monmouth County [NJ] | 410 | 175 | 45 | 42 |
| Allegheny County [PA] | 410 | 164 | 90 | 76 |
| Pima County [AZ] | 395 | 207 | 70 | 73 |
| Morris County [NJ] | 390 | 181 | 55 | 49 |
| Shelby County [TN] | 370 | 177 | 110 | 81 |
| Johnson County [KS] | 355 | 262 | (B) | - |
| Onondaga County [NY] | 350 | 151 | 120 | 98 |
| Fresno County [CA] | 345 | 186 | 85 | 66 |
| Pierce County [WA] | 335 | 318 | 140 | 148 |
| Kane County [IL] | 325 | 329 | (D) | (D) |
| Lake County [IL] | 325 | 247 | (D) | (D) |
| Plymouth County [MA] | 325 | 183 | 85 | 80 |
| Monroe County [NY] | 310 | 159 | 80 | 75 |
| Henrico County [VA] | 310 | 210 | 95 | 83 |
| Yolo County [CA] | 305 | 279 | (D) | (D) |
| Bristol County [MA] | 300 | 176 | 70 | 92 |
| Bucks County [PA] | 290 | 140 | 25 | 27 |
| Atlantic County [NJ] | 275 | 131 | 85 | 60 |
| Passaic County [NJ] | 245 | 128 | 80 | 87 |
| Ocean County [NJ] | 235 | 178 | 70 | 103 |
| Polk County [IA] | 220 | 159 | (D) | (D) |
| Clark County [WA] | 215 | 122 | 40 | 63 |
| San Francisco County [CA] | 195 | 120 | (D) | (D) |
| Macomb County [MI] | 195 | 152 | (D) | (D) |
| Hillsborough County [NH] | 195 | 178 | (D) | (D) |
| Kern County [CA] | 190 | 139 | 95 | 103 |
| Solano County [CA] | 190 | 136 | (B) | - |
| Honolulu County [HI] | 190 | 151 | 45 | 50 |
| Multnomah County [OR] | 175 | 120 | 25 | 22 |
| Anchorage Municipality [AK] | 165 | 133 | (D) | (D) |
| Arlington County [VA] | 160 | 112 | (D) | (D) |
| Washoe County [NV] | 145 | 160 | (B) | - |
| Lee County [FL] | 120 | 67 | (D) | (D) |
| Pinellas County [FL] | 115 | 86 | 40 | 33 |
| Washington County [OR] | 110 | 57 | 25 | 27 |
| San Mateo County [CA] | 85 | 63 | (B) | - |
| Jefferson Parish [LA] | 80 | 62 | (B) | - |
| El Paso County [CO] | 70 | 59 | (B) | - |
| Lancaster County [PA] | 70 | 57 | (D) | (D) |
| Bernalillo County [NM] | 65 | 56 | (B) | - |
| Chester County [PA] | 60 | 53 | (D) | (D) |
| San Juan County [NM] | 35 | 56 | (D) | (D) |
| Santa Barbara County [CA] | 30 | 37 | (B) | - |
| Monterey County [CA] | 25 | 33 | (B) | - |
| Palm Beach County [FL] | 25 | 30 | (B) | - |
| Ventura County [CA] | 15 | 20 | (D) | (D) |
| Placer County [CA] | (D) | (D) | (B) | - |
| Stanislaus County [CA] | (D) | (D) | (B) | - |
| Maui County [HI] | (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] | 67,295 | 3,381 | 16,390 | 1,337 |
| Washington-Arlington-Alexandria [DC-VA-MD-WV] | 38,590 | 2,228 | 6,705 | 936 |
| Atlanta-Sandy Springs-Roswell [GA] | 18,640 | 1,492 | 2,850 | 566 |
| Houston-The Woodlands-Sugar Land [TX] | 18,495 | 2,062 | 3,120 | 557 |
| Chicago-Naperville-Elgin [IL-IN] | 16,110 | 1,557 | 3,210 | 733 |
| Dallas-Fort Worth-Arlington [TX] | 14,430 | 1,743 | 2,195 | 482 |
| Baltimore-Columbia-Towson [MD] | 11,510 | 1,257 | 1,995 | 546 |
| Philadelphia-Camden-Wilmington [PA-NJ-DE-MD] | 9,925 | 1,120 | 1,270 | 304 |
| Los Angeles-Long Beach-Anaheim [CA] | 9,265 | 1,274 | 2,020 | 530 |
| Minneapolis-St. Paul-Bloomington [MN-WI] | 5,955 | 777 | 1,375 | 307 |
| Boston-Cambridge-Newton [MA-NH] | 5,745 | 828 | 1,220 | 314 |
| Columbus [OH] | 5,185 | 897 | 1,265 | 319 |
| Worcester [MA-CT] | 5,155 | 836 | 1,950 | 502 |
| Riverside-San Bernardino-Ontario [CA] | 4,085 | 807 | 570 | 249 |
| Detroit-Warren-Dearborn [MI] | 3,415 | 620 | 835 | 273 |
| Denver-Aurora-Lakewood [CO] | 3,355 | 789 | 1,125 | 347 |
| Hartford-West Hartford-East Hartford [CT] | 3,085 | 601 | 770 | 326 |
| Indianapolis-Carmel-Anderson [IN] | 2,910 | 942 | 805 | 463 |
| Providence-Warwick [RI-MA] | 2,735 | 485 | 860 | 276 |
| San Francisco-Oakland-Hayward [CA] | 2,695 | 656 | 520 | 254 |
| Miami-Fort Lauderdale-West Palm Beach [FL] | 2,410 | 613 | 445 | 295 |
| Charlotte-Concord-Gastonia [NC-SC] | 2,250 | 514 | 380 | 177 |
| Virginia Beach-Norfolk-Newport News [VA-NC] | 2,195 | 579 | 620 | 265 |
| Phoenix-Mesa-Scottsdale [AZ] | 2,050 | 604 | 375 | 197 |
| Seattle-Tacoma-Bellevue [WA] | 1,930 | 513 | 410 | 230 |
| St. Louis [MO-IL] | 1,805 | 548 | 300 | 146 |
| Oklahoma City [OK] | 1,725 | 437 | 390 | 198 |
| Nashville-Davidson-Murfreesboro-Franklin [TN] | 1,680 | 593 | 225 | 121 |
| Raleigh [NC] | 1,465 | 434 | 220 | 172 |
| Kansas City [MO-KS] | 1,460 | 433 | 220 | 139 |
| Cincinnati [OH-KY-IN] | 1,440 | 343 | 375 | 183 |
| Sacramento-Roseville-Arden-Arcade [CA] | 1,430 | 416 | 285 | 150 |
| Tampa-St. Petersburg-Clearwater [FL] | 1,360 | 476 | 160 | 103 |
| Richmond [VA] | 1,280 | 434 | 185 | 106 |
| Austin-Round Rock [TX] | 1,270 | 361 | 210 | 142 |
| New Haven-Milford [CT] | 1,260 | 351 | 140 | 98 |
| Trenton [NJ] | 1,185 | 439 | 225 | 124 |
| San Antonio-New Braunfels [TX] | 945 | 360 | 140 | 74 |
| San Diego-Carlsbad [CA] | 925 | 435 | 215 | 195 |
| Springfield [MA] | 925 | 333 | 215 | 140 |
| Orlando-Kissimmee-Sanford [FL] | 895 | 315 | 165 | 134 |
| Milwaukee-Waukesha-West Allis [WI] | 880 | 357 | 175 | 74 |
| Greensboro-High Point [NC] | 865 | 344 | 235 | 237 |
| Albany-Schenectady-Troy [NY] | 855 | 364 | 145 | 109 |
| Bridgeport-Stamford-Norwalk [CT] | 735 | 277 | 155 | 91 |
| Cleveland-Elyria [OH] | 730 | 211 | 140 | 91 |
| Stockton-Lodi [CA] | 650 | 316 | 110 | 118 |
| Louisville Jefferson County [KY] | 615 | 243 | 105 | 95 |
| Salt Lake City [UT] | 595 | 295 | 150 | 99 |
| Jacksonville [FL] | 555 | 219 | 155 | 131 |
| Madison [WI] | 555 | 259 | 165 | 111 |
| Syracuse [NY] | 550 | 171 | 120 | 98 |
| Las Vegas-Henderson-Paradise [NV] | 520 | 219 | 80 | 104 |
| Portland-Vancouver-Hillsboro [OR-WA] | 510 | 179 | 95 | 74 |
| Buffalo-Cheektowaga-Niagara Falls [NY] | 495 | 198 | 115 | 89 |
| San Jose-Sunnyvale-Santa Clara [CA] | 490 | 216 | 115 | 101 |
| Allentown-Bethlehem-Easton [PA-NJ] | 485 | 205 | 110 | 77 |
| Durham-Chapel Hill [NC] | 485 | 215 | 70 | 61 |
| Baton Rouge [LA] | 480 | 281 | (B) | - |
| Pittsburgh [PA] | 470 | 168 | 90 | 76 |
| Ann Arbor [MI] | 465 | 197 | 105 | 127 |
| Dayton [OH] | 455 | 190 | 55 | 51 |
| Rochester [NY] | 415 | 176 | 80 | 75 |
| Memphis [TN-MS-AR] | 405 | 191 | 110 | 81 |
| Tucson [AZ] | 395 | 207 | 70 | 73 |
| Tulsa [OK] | 395 | 182 | 40 | 35 |
| Akron [OH] | 375 | 161 | 45 | 45 |
| Omaha-Council Bluffs [NE-IA] | 360 | 158 | 155 | 143 |
| Fresno [CA] | 345 | 186 | 85 | 66 |
| New Orleans-Metairie [LA] | 340 | 127 | 35 | 34 |
| Atlantic City-Hammonton [NJ] | 275 | 131 | 85 | 60 |
| Deltona-Daytona Beach-Ormond Beach [FL] | 255 | 197 | (D) | (D) |
| Lafayette [LA] | 250 | 241 | (D) | (D) |
| Des Moines-West Des Moines [IA] | 235 | 161 | 45 | 62 |
| Manchester-Nashua [NH] | 195 | 178 | (D) | (D) |
| Bakersfield [CA] | 190 | 139 | 95 | 103 |
| Urban Honolulu [HI] | 190 | 151 | 45 | 50 |
| Vallejo-Fairfield [CA] | 190 | 136 | (B) | - |
| Anchorage [AK] | 165 | 133 | (D) | (D) |
| Lansing-East Lansing [MI] | 160 | 125 | 50 | 69 |
| Harrisburg-Carlisle [PA] | 150 | 99 | (D) | (D) |
| Reno [NV] | 145 | 160 | (B) | - |
| Grand Rapids-Wyoming [MI] | 135 | 99 | (B) | - |
| Cape Coral-Fort Myers [FL] | 120 | 67 | (D) | (D) |
| Colorado Springs [CO] | 70 | 59 | (B) | - |
| Lancaster [PA] | 70 | 57 | (D) | (D) |
| Albuquerque [NM] | 65 | 56 | (B) | - |
| Farmington [NM] | 35 | 56 | (D) | (D) |
| Santa Maria-Santa Barbara [CA] | 30 | 37 | (B) | - |
| Salinas [CA] | 25 | 33 | (B) | - |
| Oxnard-Thousand Oaks-Ventura [CA] | 15 | 20 | (D) | (D) |
| Kahului-Wailuku-Lahaina [HI] | (D) | (D) | (B) | - |
| Modesto [CA] | (D) | (D) | (B) | - |
| New York-Newark-Jersey City [NY-NJ-PA] | (D) | (D) | (B) | - |