The town had a total of 15,198 households. There were a total of 24,119 workers, comprising 213 cultivators, 215 main agricultural labourers, 499 in house hold industries, 22,582 other workers, 610 marginal workers, 8 marginal cultivators, 19 marginal agricultural labourers, 63 marginal workers in household industries and 520 other marginal workers. As per the religious census of 2011, Periyasemur (M) had 93.75% Hindus, 3.34% Muslims, 2.77% Christians, 0.03% Sikhs, 0.02% Jains and 0.08% following other religions.
The town had 15,198 households and a workforce of 24,119 individuals. The workers were divided into various categories: cultivators, agricultural laborers, household industry workers, other workers, marginal workers, and others.  According to the 2011 census, Periyasemur was predominantly Hindu (93.75%), followed by Muslims (3.34%), Christians (2.77%), Sikhs (0.03%), Jains (0.02%), and other religions (0.08%).