The Census of 1801 initiated a series of censuses held every decade.
The censuses of 1815, 1825, 1835, 1845, and 1855 were numeric, and so did not request any information on individuals. Nevertheless, the census material in the archives left by Ministers and Town Administrations kept in the National Archives contains several lists of names. Folk og Fant by Anna Tranberg (The Norwegian institute of Local history, 1986) contains an overview of the census lists that included names of individuals.
The census lists indicate the numbers of households and divide the population into age categories and professional groups. The census also collected information on animal husbandry and seeding for the very first time in 1835. This combination was continued through the census of 1900.