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Treaties
Louisiana Purchase

Treaty of Guadalupe Hidalgo

Counties per Cession
Cession
Cession 426
Counties
Adams, Arapahoe, Bent, Boulder, Chaffee, Cheyenne, Custer, Denver, Douglas, Elbert, El Paso, Fremont, Huerfano, Jackson, Jefferson, Kiowa, Kit Carson, Lake, Larimer, Las Animas, Lincoln

Cession
Cession 432
Counties
Moffat, Lincoln, White Pine, Carbon, Daggett, Duchesne, Emery, Garfield, Iron, Juab, Kane, Millard, Piute, Sanpete, Sevier, Uintah, Utah, Wasatch, Washington, Wayne

Cession
Cession 477
Counties
Bent, Cheyenne, Crowley, Elbert, El Paso, Kiowa, Lincoln, Otero, Prowers, Pueblo

Cession
Cession 478
Counties
Baca, Bent, Costilla, Las Animas, Otero, Prowers, Clark, Ford, Grant, Gray, Hamilton, Haskell, Kearny, Meade, Morton, Seward, Stanton, Stevens, Archer, Atascosa, Bandera, Baylor, Bexar

Cession
Cession 515
Counties
Alamosa, Conejos, Costilla, Eagle, Grand, Gunnison, Mineral, Moffat, Pitkin, Rio Grande, Routt, Saguache, Summit, Grand, San Juan, Uintah

Cession
Cession 520
Counties
Jackson, Moffat, Routt, Bannock, Bear Lake, Bingham, Blaine, Bonneville, Butte, Caribou, Cassia, Clark, Custer, Franklin, Fremont, Jefferson, Lemhi, Madison, Oneida, Power, Teton

Cession
Cession 566
Counties
Archuleta, Dolores, Hinsdale, La Plata, Mineral, Montezuma, Ouray, San Juan, San Miguel

Cession
Cession 586
Counties
Moffat, Routt

Cession
Cession 609
Counties
Archuleta, Conejos, Hinsdale, Mineral, Rio Grande

Cession
Cession 616
Counties
Delta, Dolores, Eagle, Garfield, Gunnison, Mesa, Montezuma, Montrose, Ouray, Pitkin, Rio Blanco, San Miguel

Cession
Cession 617
Counties
Archuleta, La Plata, Montezuma