area (sq. miles) | county count | state count | span (miles) | span center | span end 1 | span end 2 |
| 1 | 330635 | 1 | 91 | 1 | 5 | 1 | 1235 | Nye-NV (38.44, 115.69) | Cochise-AZ (31.33, 109.05) | Polk-OR (45.08, 123.72) |
| 2 | 21409 | 4 | 5 | 3 | 2 | 2 | 325 | Millard-UT (39.51, 112.90) | Carbon-UT (39.79, 109.87) | White Pine-NV (39.16, 115.91) |
| 3 | 10329 | 2 | 11 | 5 | 1 | 5 | 167 | Douglas-CO (39.43, 105.09) | Lake-CO (39.06, 106.58) | Adams-CO (40.00, 103.71) |
| 4 | 7418 | 8 | 2 | 5 | 1 | 3 | 205 | no county here (20.31, 156.07) | Maui-HI (21.25, 157.30) | Hawaii-HI (19.45, 154.77) |
| 5 | 6118 | 8 | 2 | 5 | 1 | 4 | 168 | Yakima-WA (46.73, 121.32) | Pierce-WA (47.40, 122.80) | Yakima-WA (46.04, 119.87) |
| 6 | 4938 | 11 | 1 | 5 | 1 | 10 | 111 | Custer-ID (44.20, 114.32) | Custer-ID (43.80, 113.36) | Custer-ID (44.61, 115.28) |
| 7 | 4536 | 6 | 3 | 5 | 1 | 6 | 159 | Carroll-NH (44.16, 71.24) | Merrimack-NH (43.01, 71.39) | Coos-NH (45.31, 71.08) |
| 8 | 4380 | 11 | 1 | 5 | 1 | 9 | 115 | Piscataquis-ME (45.80, 69.27) | Piscataquis-ME (45.01, 69.62) | Piscataquis-ME (46.57, 68.82) |
| 9 | 3769 | 3 | 8 | 2 | 3 | 7 | 135 | Frederick-MD (39.44, 77.29) | Anne Arundel-MD (38.71, 76.45) | Fulton-PA (40.17, 78.13) |
| 10 | 2529 | 6 | 3 | 5 | 1 | 8 | 126 | Suffolk-NY (40.87, 72.94) | Suffolk-NY (41.23, 71.83) | Queens-NY (40.51, 74.04) |
| 11 | 2256 | 11 | 1 | 5 | 1 | 11 | 85 | Hancock-ME (44.69, 68.40) | Hancock-ME (44.12, 68.73) | Hancock-ME (45.26, 68.06) |
| 12 | 1663 | 4 | 5 | 5 | 1 | 12 | 71 | Rappahannock-VA (38.61, 78.16) | Greene-VA (38.28, 78.66) | Fauquier-VA (38.94, 77.66) |
| 13 | 1138 | 8 | 2 | 3 | 2 | 14 | 53 | Sevier-TN (35.66, 83.59) | Sevier-TN (36.04, 83.66) | Swain-NC (35.28, 83.68) |
| 14 | 947 | 11 | 1 | 5 | 1 | 13 | 54 | Berkshire-MA (42.40, 73.26) | Berkshire-MA (42.05, 73.50) | Berkshire-MA (42.74, 73.02) |
| 15 | 729 | 11 | 1 | 5 | 1 | 16 | 41 | Cheshire-NH (42.94, 72.19) | Cheshire-NH (42.71, 71.93) | Cheshire-NH (43.16, 72.45) |
| 16 | 689 | 11 | 1 | 5 | 1 | 15 | 41 | Columbia-OR (45.94, 123.06) | Columbia-OR (45.73, 122.76) | Columbia-OR (46.15, 123.36) |
| 17 | 537 | 11 | 1 | 5 | 1 | 18 | 34 | Sussex-NJ (41.14, 74.68) | Sussex-NJ (41.09, 74.99) | Sussex-NJ (41.20, 74.37) |
| 18 | 494 | 11 | 1 | 5 | 1 | 17 | 40 | New Castle-DE (39.56, 75.61) | New Castle-DE (39.83, 75.47) | New Castle-DE (39.30, 75.76) |
| 19 | 144 | 11 | 1 | 5 | 1 | 19 | 21 | Clayton-GA (33.51, 84.37) | Clayton-GA (33.35, 84.35) | Clayton-GA (33.65, 84.46) |