As of 2011, Kakbai had a population of 988, in 180 households.[1]: 149 This population was 54.7% male (540) and 45.3% female (448). The 0-6 age group numbered 145 (78 male and 67 female), or 14.7% of the total population. 51 residents were members of Scheduled Castes, or 5.2% of the total.[2]: 118–9
The 1961 census recorded Kakbai (as "Kakwai") as comprising 4 hamlets, with a total population of 390 people (232 male and 158 female), in 65 households and 50 physical houses. The area of the village was given as 510 acres.[3]: lvi
Infrastructure
As of 2011, Kakbai had 1 primary school; it did not have any kind of healthcare facility. Drinking water was provided by hand pump; there were no public toilets. The village had a post office but no public library; there was at least some access to electricity for all purposes. Streets were made of both kachcha and pakka materials.[1]: 149–54