The impact of different seasons on the population of earthworm species viz. Lampito mauritii, Amynthas morrisi and Dichogaster bolaui were studied in three different habitats (i.e., agricultural, garden and waste lands) of Sirohi district of Rajasthan. Highest population of Dichogaster bolaui was recorded in garden in August, whereas its population was low in waste land. The earthworm Amynthas morrisi was abundant in garden but poor in waste land. Maximum population of Lampito mauritii was in agricultural land and but its minimum population was found in waste land. The highest numbers of all three species (viz., Lampito mauritii, Amynthas morrisi, Dichogaster bolaui) were observed in the rainy season (July-Aug.). The populations of the earthworm species were meager in the months of summer (May) and winter (December-January). Earthworms showed their peak population during July-August and the second population peak was observed in February-March. The results suggested that these earthworm species breed twice in a year indicating two population peaks in different habitats of Sirohi district of Rajasthan.