Source: Istat (1994) Resident population of municipalities - Censuses from 1861 to 1991 (Territorial districts as of 20 October 1991).
The increment rate is computed from the compound interest formula, taking as time intervals those between Census dates.
In 1866, following the Third Italian Independence war, the Veneto district (then including the Udine district) and the Mantova district municipalities are annexed to Italy. Census data until 1911 are missing for the municipalities annexed after World War 1 and that formed Venezia Giulia and Venezia Tridentina.
Some municipalities belonging to the Hapsburg Empire between 1871 and 1911 and being part of the territories annexed to Italy after World War 1 have been ascribed to Italy. They are Pedemonte and Casotto, whose populations have been ascribed to the Vicenza province. This is an exception to the rule by which the figures of those municipalities which have been annexed after the Reign of Italy establishment should be considered starting from the first census following their annexation. The population registered by the austrian censuses has been ascribed to these municipalities.
The following population amounts have been ascribed to the Vicenza province for the censuses from 1871 to 1911.