7 C.F.R. § 1032.2
The marketing area means all territory within the bounds of the following states and political subdivisions, including all piers, docks, and wharves connected therewith and all craft moored thereat, and all territory occupied by government (municipal, State, or Federal) reservations, installations, institutions, or other similar establishments if any part thereof is within any of the listed states or political subdivisions:
Colorado Counties
Adams, Arapahoe, Baca, Bent, Boulder, Broomfield, Chaffee, Clear Creek, Cheyenne, Crowley, Custer, Delta, Denver, Douglas, Eagle, El Paso, Elbert, Fremont, Garfield, Gilpin, Gunnison, Huerfano, Jefferson, Kiowa, Kit Carson, Lake, Larimer, Las Animas, Lincoln, Logan, Mesa, Montrose, Morgan, Otero, Park, Phillips, Pitkin, Prowers, Pueblo, Sedgwick, Summit, Teller, Washington, Weld, and Yuma.
Illinois Counties
Adams, Alexander, Bond, Brown, Bureau, Calhoun, Cass, Champaign, Christian, Clark, Clay, Clinton, Coles, Crawford, Cumberland, De Witt, Douglas, Edgar, Edwards, Effingham, Fayette, Ford, Franklin, Fulton, Gallatin, Greene, Grundy, Hamilton, Hancock, Hardin, Henderson, Henry, Iroquois, Jackson, Jasper, Jefferson, Jersey, Johnson, Kankakee, Knox, La Salle, Lawrence, Livingston, Logan, McDonough, McLean, Macon, Macoupin, Madison, Marion, Marshall, Mason, Massac, Menard, Mercer, Monroe, Montgomery, Morgan, Moultrie, Peoria, Perry, Piatt, Pike, Pope, Pulaski, Putnam, Randolph, Richland, Rock Island, Saline, Sangamon, Schuyler, Scott, Shelby, St. Clair, Stark, Tazewell, Union, Vermilion, Wabash, Warren, Washington, Wayne, White, Whiteside, Williamson, and Woodford.
Iowa Counties
All Iowa counties except Howard, Kossuth, Mitchell, Winnebago, Winneshiek, and Worth.
Kansas
All of the State of Kansas.
Minnesota Counties
Lincoln, Nobles, Pipestone, and Rock.
Missouri Counties and Cities
The counties of Andrew, Atchison, Bates, Buchanan, Caldwell, Carroll, Cass, Clay, Clinton, Daviess, De Kalb, Franklin, Gentry, Grundy, Harrison, Henry, Hickory, Holt, Jackson, Jefferson, Johnson, Lafayette, Lincoln, Livingston, Mercer, Nodaway, Pettis, Platte, Putnam, Ray, Saline, Schuyler, St. Charles, St. Clair, Ste. Genevieve, St. Louis, Sullivan, Warren, and Worth; and the city of St. Louis.
Nebraska Counties
Adams, Antelope, Boone, Buffalo, Burt, Butler, Cass, Cedar, Chase, Clay, Colfax, Cuming, Custer, Dakota, Dawson, Dixon, Dodge, Douglas, Dundy, Fillmore, Franklin, Frontier, Furnas, Gage, Gosper, Greeley, Hall, Hamilton, Harlan, Hayes, Hitchcock, Howard, Jefferson, Johnson, Kearney, Keith, Knox, Lancaster, Lincoln, Madison, Merrick, Nance, Nemaha, Nuckolls, Otoe, Pawnee, Perkins, Phelps, Pierce, Platte, Polk, Red Willow, Richardson, Saline, Sarpy, Saunders, Seward, Sherman, Stanton, Thayer, Thurston, Valley, Washington, Wayne, Webster, and York.
Oklahoma
All of the State of Oklahoma.
South Dakota Counties
Aurora, Beadle, Bon Homme, Brookings, Clark, Clay, Codington, Davison, Deuel, Douglas, Hamlin, Hanson, Hutchinson, Jerauld, Kingsbury, Lake, Lincoln, McCook, Miner, Minnehaha, Moody, Sanborn, Spink, Turner, Union, and Yankton.
Wisconsin Counties
Crawford and Grant.
7 C.F.R. §1032.2