Due to the variations in climatic conditions, geographical settings, agro-ecological zones, socio economic and cultural setups even at micro level, it is very essential to knowspatial and temporal variation in population density at micro level for optimum and sustainable development. The study region has three distinctivegeomorphologic landform i. e., alluvial plain, aeolian plain and flood plain of Ghaggar river. Therefore, in the present study an attempt has been made to map and analyse the spatial and temporal variation in population density at block level in Sirsa district of Haryana for the census years 2001 and 2011.Data was processed in excel software and put into GIS environment for generating choropleth maps of the study area. This study reveals that during the last decade the study area has added 66 more persons per Sq. Km. The population density of Sirsa district was 196 and 233 persons per Sq. Km for the census years 2001 and 2011 respectively. The decadal growth of population density in terms of percentage ranges from 14 % to 23%. It was highest (23%) in Odhan block and lowest (14%) in Bara Gurha block. This study also reveals that densely populated blocks fall in the Ghaggar flood plain whereas sparsely inhabited blocks fall into agriculturally less developed areas i. e. ,older alluvial plain and aeolian plain. The results of this research may be useful for geographers, researchers, regional planners, administrator, engineers, and agriculture scientist.