Any county not listed for this state is $37 unless otherwise indicated.
 
1820 Census
Illinois - $37 each county

1830 Census 
Illinois - $27 each county

1840 Census 
Illinois - $17 each for the counties of: Cook, Will 
           $37 each county except for the following:  
           $57 each for the counties of: Adams, Alexander 

1850 Census
Illinois - $37 each county except for the following:
           $17 each for the counties of: De Kalb, Perry 
           $27 each for the counties of: Randolph
           $57 each for the counties of: Fayette, Franklin, Fulton, 
                     Gallatin, Jersey, Jo Daviess, Johnson, Kane,
                     Kendall, Knox, La Salle, Lawrence, McHenry, 
                     McLean, Macon, Macoupin, Madison, Marion, Monroe, 
                     Montgomery, Ogle, Peoria, Rock Island, St. Clair,
                     Saline, Sangamon, White, Whiteside,Will, 
                     Williamson, Winnebago, Woodford  
           $97 each for the counties of: Adams, Coles, Cook (excluding
                     the city of Chicago), Lake
           $97 City of Chicago

1860 Census
Illinois - $97 each county except as follows: 
           $27 for the county of: Franklin
           $47 for the county of: Randolph
           $57 each for the counties of Alexander, Bond, Boone, Brown,
                     Calhoun, Carroll, Cass, Champaign, Clark, Clay, 
                     Coles, Crawford, De Witt, Douglas, Edgar, Edwards,
                     Effingham, Fayette, Ford, Grundy, Henderson, Henry, 
                     Iroquois, Jackson, Lawrence, Lee, Marshall, Mason, Morgan, 
                     Moultrie, Piatt, Pope, Pulaski, Putnam, Richland, Rock Island, 
                     Schuyler, Shelby, Wabash, Warren, Wayne, White 
           $97 each for the counties of: Adams (excluding the city of
                     Quincy), Peoria (excluding the city of Peoria), 
                     Cities of Quincy or Peoria
          $107 for the county of: Kane  
          $147 each for the counties of: Cook Cty. (excluding the city 
                     of Chicago), La Salle, St. Clair
      City of Chicago - $57 for each ward except #7 which is $97

1870 Census 
Illinois - $57 each county except as follows:
           $97 each for the counties of: Bureau, Cass, Champaign, 
                     Christian, Clark, Coles, De Kalb, Du Page, Edgar, 
                     Fayette, Hancock, Henry, Iroquois, Jo Daviess, 
                     Johnson, Kankakee, Kendall, Lake, Lawrence, Lee, 
                     Livingston, Logan, Macon, Macoupin, Marion, 
                     Marshall, McDonough, McHenry, Madison, Monroe,
                     Montgomery, Morgan, Moultrie, Ogle, Pike, Pope, 
                     Rock Island, Saline, Stephenson, Shelby, Stark, 
                     Tazewell, Union, Vermilion, Washington, Wayne, 
                     White, Whiteside, Williamson, Winnabago,
                     Woodford       
          $147 each for the counties of: Adams, Cook (excluding the city
                     of Chicago), Fulton, Kane, Knox, La Salle, McLean, 
                     Peoria (excluding the city of  Peoria), St. Clair, 
                     Sangamon, Will 
   City of Chicago - $57 each for: wards ,2,4,5,11,12,13,14,16,17,19,20 
                     $97 each for: wards 3,6,7,8,9,10,15,18
   City of Peoria  - $57

1880 Census
Illinois - $37 each county except as follows:
           $27 for the county of: Monroe
           $47 each for the county: Du Page
           $57 each for the counties of: Bureau, Calhoun, Effingham, 
                     Fayette, Ford, Franklin, Galatin, Greene, Grundy, 
                     Hancock, Hardin, Henderson, Henry, Iroquois, 
                     Jackson, Jefferson, Kankakee, Kendall, Lee, 
                     Logan, McDonough, McHenry, Macon, Marshall, 
                     Massac, Montgomery, Morgan, Perry,
                     Pike, Randolph, Richland, White, Whiteside, Williamson, 
                     Woodford   
           $97 each for the counties of:  Adams, Champaign, 
                     Christian, Edgar, Fulton, Lawrence, Macoupin,
                     Moultrie, Ogle, Peoria, Rock Island, Stephenson,
                     Tazewell, Washington, Winnebago
          $147 for the county of:   
          $197 each for the counties of:  Kane, Knox, Livingston, 
                     Madison, St. Clair, Sangamon, Shelby, Vermilion, 
                     Will 
          $297 each for the counties of: Cook (excluding the city of 
                     Chicago), La Salle, McLean 
     City of Chicago - $57 each for wards 1, 3, 8, 9, 10, 15, 17
           $97 each for wards 2, 5, 11, 12, 13, 16  
          $197 each for wards 4, 6, 7, 14, 18 
       OR  $22 each Enumeration District (EDs) 

1890 Census 
Illinois - $37 McDonough Cty (Mound Twp)
               Most of the 1890 population schedules were badly damaged
               by fire in the Commerce Department Building in January 
               1921.  These are the only remaining records.

1900 Census 
Illinois - $37 each county except as follows:
           $47 each for the counties of: Perry
           $57 each for the counties of: Alexander, Brown, Bureau, Cass, 
                     Clay, Clinton, Du Page, Edgar, Fayette, Ford, Greene, 
                     Grundy, Iroquois, Jo Daviess, Kankakee, Kendall, 
                     Lake, Lee, McDonough, McHenry, Macoupin, Marshall,
                     Mason, Massac, Menard, Mercer, Monroe, Montgomery,
                     Morgan, Ogle, Rando1ph, Warren, Williamson, 
                     Woodford
           $77 each for the county of: Coles 
           $97 each for the counties of: Champaign, Henry, Christian, 
                     Cumberland, DeKalb, Jackson, Knox, Lawrence, 
                     Livingston, Logan, Macon, Marion, Union, Wayne,
                     White 
          $147 each for the counties of: Adams, Fulton, McLean, Madison,
                     Peoria, Rock Island, Sangamon, Stephenson, 
                     Vermilion, Will, Winnebago
          $197 each for the counties of: La Salle, St. Clair 
    Cook County & City of Chicago is not available at this time.
    (Use "Comments" to add your name to a waiting list to reduce the cost
    of 1900 Cook County).
          $227 for the county of: Kane 

1910 Census
Illinois - $37 each county except for the following:
           $47 each for the counties of: De Witt, Perry 
           $57 each for the counties of: Alexander, Bureau, Cass, 
                     Clinton, Coles, Crawford, DeKalb, Dupage, Fayette, 
                     Franklin, Greene, Grundy, Hancock, Iroquois, 
                     Jackson, Jasper, Jefferson, Jo Daviess, Kankakee, 
                     Lawrence, Lee, Livingston, McDonough, McHenry,
                     Massac, Menard, Montgomery, Morgan, Ogle, 
                     Rando1ph, Saline, Schuyler, Shelby, Stark,
                     Stephenson, Tazwell, Union, Wabash, Warren, 
                     Washington, Wayne, White, Whiteside, Williamson,
                     Woodford
           $67 for the county of: Perry 
           $97 each for the counties of Champaign, Christian, Fulton, 
                     Henry, Logan, Macon, Macoupin, Marion,           
          $197 each for the counties of: Adams, Knox, Lake, McLean,
                     Madison, Peoria, Rock Island, Sangamon, Vermilion,
                     Will, Winnebago
          $257 for the county of: Kane 
          $297 each for the counties of: La Salle, St. Clair 
   Cook County & City of Chicago - is not available at this time.
   (Use "Comments" to add your name to a waiting list to reduce the cost
   of 1910 Cook County).
     
1920 Census 
Illinois - $37 each county except for the following:
           $27 for the county of: Moultrie
           $47 each for the counties of: De Witt 
           $57 each for the counties of: Clark, Crawford, De Kalb, Du Page, 
                     Fayette, Fulton, Hancock, Henry, Iroquois, Kankakee, 
                     Knox, Lee, Livingston, Logan, Macon, McHenry, 
                     Marion, Montgomery, Morgan, Ogle, Saline, Stephenson, 
                     Tazewell, Wabash, Washington, Whiteside
           $57 for the county of: Edgar
           $97 each for the counties of: Bureau, Christian, Franklin, 
                     Lake, Macoupin, McLean
          $147 each for the counties of: Adams, Champaign, Rock Island, 
                     Williamson, Winnebago
          $197 each for the counties of: La Salle, Madison, Peoria, 
                     Sangamon, Vermilion, Will
          $247 for the county of: St. Clair  
     Cook County & City of Chicago are not available at this time.
     (Use "Comments" to add your name to a waiting list to reduce the cost
     of 1920 Cook County).