Wards are created by the city and they would probably be the same from 1905 to 1910. However, enumeration districts are created for the federal census, which is taken in years ending in 0. Enumeration district were not used by the state, which initiated the censuses that were taken in years ending in 5. Just go by the ward number. Please note that there is an alphabetical index (available on microfilm) to the Milwaukee County portion of the Wisconsin state census of 1905. Mary Popovich Busia's Roots Professional Genealogy