The first census conducted by the U.S. military forces took place in 1903 to fulfill Public Act 467 which was approved by the United States Philippine Commission in October 6, 1902.

Its population was 1,915 in the 2011 census, while the town's municipal census conducted in 2012 counted a population of 2,116.

A special census conducted in 2006 places the population at 9,818.

As Árpád E. Varga writes, "the census conducted in 1930 met international statistical requirements in every respect.

A census conducted by the judiciary from 1388-1398 lists the names of 515 heads of households.

Over the years, the number of Adélies had fallen to a few dozen breeding pairs, and a census conducted earlier that season indicated that the rookery was on the verge of disappearing.

In a census conducted in 1922 by the British Mandate authorities, Haris (called: Hares) had a population of 285, all Muslims.

Per the census conducted on 29 February 2004, the population of Blackbuck was 405 (10 spotted in the IIT campus).

Per the census conducted on 29 February 2004, the population of the spotted deer was 2,650.

Normally, the census conducts a kind of dress rehearsal for census collection.