Any county not listed for this state is $37 unless otherwise indicated.

1810 Census 
Louisiana - $27 each parish

1820 Census
Louisiana - $37 each parish

1830 Census 
Louisiana - $27 each parish except for Orleans which is $97 

1840 Census 
Louisiana - $37 each parish except for the following:
            $97 Orleans Parish (excluding the city of New Orleans)
            $97 each municipality in the City of New Orleans

1850 Census 
Louisiana - $37 each parish for "free" schedules except as follows:
            $17 for the parish of: Carroll
            $97 for Orleans Parish (excluding the city of New Orleans)
            $37 for each ward in the 1st municipality of the City of 
                      New Orleans
           $147 for the 2nd municipality of the city of Orleans Parish
            $27 each parish for "slave" schedules 

1860 Census
Louisiana - $37 each parish for "free" schedules except as follows:
            $17 for the parish of: Carroll 
            $47 for the parish of: Avoyelles
            $57 each for the parishes of Jefferson, Lafeyette
    City of New Orleans $57 each for wards 2,4,6,7,8,10
            $97 each for wards 1, 3, 5, 9, 11
    NOTE - New Orleans Parish does not include the city.
            $27 each parish for "slave" schedules

1870 Census
Louisiana - $37 each parish except as follows: 
            $27 each for the parishes of: Bienville, Sabine
            $57 each for the parishes of Ascension, Assumption, 
                      Concordia, De Soto, Bossier, East 
                      Baton Rouge, East Feliciana, Iberville, 
                      Jackson, Lafayette, Lafourche, Ouachita, 
                      Plaquemines, St. Martin, St. Mary, Union,
                      Vermilion 
            $97 each for the parishes of Avoyelles, Caddo, Claiborne, 
                      Jefferson, Natchitoches, Pointe Coupee, St. 
                      Landry, Terrebonne
     City of New Orleans - $57 each ward except #3 which is $97 

1880 Census
Louisiana - $37 each parish except as follows:
            $17 for the parish of: Sabine 
            $57 each for the parishes of Ascension, Assumption, 
                      Jefferson, Morehouse, Natchitoches, Ouachita, 
                      St. Charles, St. John the Baptist, St. Martin, 
                      Tensas  
            $97 each for the parishes of Rapides, St.Landry, 
                      Terrebonne
   City of New Orleans - $57 each for wards 1, 3, 5, 6, 7, 8, 9,
                      10, 11, 12, 13, 14, 15, 16, 17    
            $97 each for wards 2, 4
        OR  $22 each Enumeration District (EDs)
  
1900 Census 
Louisiana - $37 each parish except as follows:
            $57 each for the parishes of Ascension, Assumption, 
                      Bienville, Bossier, Calcasieu, East 
                      Baton Rouge, Lafayette, Lafourche, St. Mary,
                      Terrebonne and Union 
            $67 for the parish of: Avoyelles
            $97 each for the parishes of Acadia, Caddo, De Soto, St. 
                      Landry, St. Martin
   Orleans Parish & City of New Orleans is not available at this time
   (contact host through "Comments" for way to reduce this cost    
   significantly)

1910 Census
Louisiana - $37 each parish except for the following:
            $57 each for the parishes of Acadia, Ascension,
                      Assumption, Avoyelles, Calcasieu, East Baton 
                      Rouge, Grant, Iberville, Lafayette, Lafourche, 
                      Quachita, St. Martin, St. Mary, St. Tammany, 
                      Union, Washington, Webster 
            $97 each for the parishes of Acadia, Caddo, De Soto, 
                      Natchitoches, Rapides, St. Landry                    
   Orleans Parish & City of New Orleans - is not available at this 
   time (use "Comments" to contact us for way to reduce cost of 
   populous counties)

1920 Census 
Louisiana - $37 each parish except for the following: 
            $57 each for the parishes of: Acadia, Avoyelles, 
                      Bienville, Bossier, Calcasieu, De Soto, East 
                      Baton Rouge, Evangeline, Iberia, Iberville, 
                      Jefferson, Lafourche, Lincoln, Livingston, 
                      Morehouse, Natchitoches, Plaquemines, Pointe 
                      Coupee, Quachita, St. James, St. Mary, 
                      Tangipahoa, Terrebonne, Vernon, West Baton, 
                      Washington, Webster 
            $97 each for the parishes of: Caddo, St. Landry
           $127 for the parish of: Rapides  
   Orleans Parish & City of New Orleans are not available at this 
   time. (Use "Comments" to get info on reducing cost of populous 
   areas)