Although the individual census records do not survive, abstracts of the general population are still in existence.
In 1821, there were 221 inhabited houses in Kilnamona with 238 families. The gender split was 714 males and 631 females in 1821 . Kilnamona's population increased from 1345 to 1767 between 1821 and 1831 .
Kilnamona's population loss between the censuses of 1841 and 1851 was enormous. It went from 2,321 to 1,487. The number of inhabited houses went down from 352 to 229. In all probability, the decline was probably far steeper, as the 1841 census is thought to have undercounted the population. It is also thought that the population would have increased up to the start of the famine in Clare in 1846 . The following table shows Kilnamona's townlands and their population decline in the decades after the famine: