Any county not listed for this state is $37 unless otherwise indicated.
 
1790 Census 
Rhode Island - $57 for the entire state

1800 Census 
Rhode Island - $37 each for the counties of Bristol, Kent, Providence
               $57 each for the counties of Newport, Washington

1810 Census
Rhode Island - $37 each for the counties of Kent, Newport, Washington
               $57 each for the counties of Bristol, Providence

1820 Census 
Rhode Island - $57 each for the counties of Bristol, Kent, 
                      Newport, Washington
               $97 for the county of Providence 

1830 Census 
Rhode Island - $37 each for the counties of Bristol, Kent, Newport,
                      Washington
               $97 for Providence Cty.

1840 Census
Rhode Island - $37 each for the counties of Bristol, Kent, Newport
               $97 each for the counties of Providence, Washington

1850 Census 
Rhode Island - $57 each for the counties of Bristol, Kent
               $97 each for the counties of: Newport, Washington
              $147 for Providence Cty. (excluding the City)
               $57 each ward in the city of Providence 

1860 Census
Rhode Island - $97 each for the counties of: Bristol, Kent, 
                      Newport, Washington
              $197 for Providence Cty. (excluding the City)
              $197 for the city of Providence 

1870 Census 
Rhode Island - $97 each county except as follows:
               $57 each for the counties of Bristol, Kent 
              $197 for the county of Providence (excluding the town of 
                      North Providence and city of Providence) 
   City of Providence 
               $37 each for all wards except #8, #9 which are $57 each
   Town of North Providence - $97

1880 Census 
Rhode Island - $57 each for the counties of Bristol, Kent, Newport, 
               $97 for the county of Washington 
              $197 for the City of Providence
              $197 for Providence Cty. (excluding the city of 
                      Providence) OR  
               $22 each Enumeration District (EDs)

1900 Census
Rhode Island - $57 each for the counties of Bristol, Kent, Newport, 
                      Washington 
    The county of Providence (ixcluding the City of Providence) is 
    not available at this time
   (for information on reducing the cost of populous areas, e-mail 
   "Comments")

1910 Census
Rhode Island - $57 each for the counties of Bristol, Kent, Newport, 
                      Washington 
   The county of Providence is not available at this time 
   (use "Comments" to contact us for way to reduce cost of populous 
   counties)

1920 Census
Rhode Island - $57 each for the counties of: Bristol, Kent, 
                      Newport,Washington
   The county of Providence is not available at this time