area (sq. miles) | county count | state count | span (miles) | span center | span end 1 | span end 2 |
| 1 | 18671 | 6 | 1 | 2 | 1 | 2 | 214 | Coconino-AZ (35.63, 111.64) | Coconino-AZ (34.26, 110.76) | Coconino-AZ (37.00, 112.54) |
| 2 | 8522 | 1 | 3 | 2 | 1 | 1 | 274 | Maui-HI (20.54, 156.54) | Honolulu-HI (21.60, 158.33) | Hawaii-HI (19.45, 154.77) |
| 3 | 3814 | 6 | 1 | 2 | 1 | 3 | 106 | Culberson-TX (31.33, 104.47) | Culberson-TX (30.66, 104.92) | Culberson-TX (32.00, 104.02) |
| 4 | 2130 | 6 | 1 | 2 | 1 | 7 | 67 | El Paso-CO (38.83, 104.54) | El Paso-CO (38.52, 104.05) | El Paso-CO (39.13, 105.03) |
| 5 | 1915 | 6 | 1 | 2 | 1 | 9 | 67 | Essex-NY (44.18, 73.78) | Essex-NY (43.81, 74.21) | Essex-NY (44.55, 73.34) |
| 6 | 1831 | 6 | 1 | 2 | 1 | 4 | 85 | Coos-NH (44.70, 71.21) | Coos-NH (44.09, 71.34) | Coos-NH (45.31, 71.08) |
| 7 | 1818 | 3 | 2 | 2 | 1 | 8 | 67 | Ulster-NY (42.05, 74.12) | Greene-NY (42.46, 73.78) | Ulster-NY (41.59, 74.37) |
| 8 | 1744 | 3 | 2 | 1 | 2 | 5 | 84 | Somerset-PA (39.73, 79.08) | Somerset-PA (40.24, 78.66) | Garrett-MD (39.21, 79.49) |
| 9 | 1400 | 1 | 3 | 2 | 1 | 6 | 79 | Summit-CO (39.44, 106.03) | Lake-CO (39.06, 106.58) | Clear Creek-CO (39.75, 105.40) |
| 10 | 822 | 6 | 1 | 2 | 1 | 12 | 41 | Bienville-LA (32.34, 93.09) | Bienville-LA (32.45, 92.78) | Bienville-LA (32.24, 93.43) |
| 11 | 698 | 6 | 1 | 2 | 1 | 14 | 38 | Pendleton-WV (38.68, 79.33) | Pendleton-WV (38.96, 79.35) | Pendleton-WV (38.41, 79.31) |
| 12 | 561 | 6 | 1 | 2 | 1 | 10 | 44 | Cleburne-AL (33.69, 85.60) | Cleburne-AL (33.96, 85.40) | Cleburne-AL (33.47, 85.89) |
| 13 | 537 | 6 | 1 | 2 | 1 | 16 | 34 | Sussex-NJ (41.14, 74.68) | Sussex-NJ (41.09, 74.99) | Sussex-NJ (41.20, 74.37) |
| 14 | 512 | 6 | 1 | 2 | 1 | 15 | 35 | Pickens-SC (34.85, 82.72) | Pickens-SC (34.62, 82.85) | Pickens-SC (35.07, 82.57) |
| 15 | 501 | 3 | 2 | 2 | 1 | 11 | 42 | Union-GA (34.82, 83.85) | Union-GA (34.65, 84.16) | Towns-GA (34.99, 83.55) |
| 16 | 467 | 6 | 1 | 2 | 1 | 17 | 31 | Logan-OH (40.38, 83.77) | Logan-OH (40.23, 83.55) | Logan-OH (40.54, 83.99) |
| 17 | 444 | 6 | 1 | 2 | 1 | 13 | 39 | Tishomingo-MS (34.73, 88.26) | Tishomingo-MS (34.46, 88.16) | Tishomingo-MS (35.00, 88.36) |
| 18 | 405 | 6 | 1 | 2 | 1 | 18 | 28 | Wayne-IN (39.87, 85.01) | Wayne-IN (40.01, 84.81) | Wayne-IN (39.72, 85.19) |
| 19 | 313 | 6 | 1 | 2 | 1 | 20 | 28 | Yancey-NC (35.89, 82.33) | Yancey-NC (36.08, 82.40) | Yancey-NC (35.70, 82.26) |
| 20 | 271 | 6 | 1 | 2 | 1 | 19 | 28 | DeKalb-GA (33.79, 84.23) | DeKalb-GA (33.97, 84.35) | DeKalb-GA (33.61, 84.12) |
| 21 | 68 | 6 | 1 | 2 | 1 | 21 | 14 | City of Washington-DC (38.89, 77.04) | City of Washington-DC (38.79, 77.04) | City of Washington-DC (39.00, 77.04) |