The city lies on the banks of Khowai River and hence from the river the city gets its name. Located near the Bangladesh border it has boundaries with it on its entire Southern part and has a monsoon influenced humid subtropical climate with large amounts of rain almost all year. The city experiences long, hot and wet summers, lasting from April to October. Average temperatures are around 28 °C (82 °F), fluctuating with rainfall. There is a short, mild winter from mid-November to early March, with mostly dry conditions and average temperatures around 18 °C (64 °F).
The sub-division has already become a district named "Khowai". All the district regulatory offices will start functioning in the district town Khowai. Two sub-division Khowai and Teliamura make New District, its total area - 13778.28 km2. The length of Border along Khowai is 61.5 km. It is almost fully fenced (only 950 meters pending).
As of 2011 India census, Khowai District had a population of 3,27,564. Males constitute 51.10% of the population and females 48.90%. Khowai District has an average literacy rate of 87.78%, male literacy is 92.17%, and female literacy is 83.17 %. In Khowai, 38,659 population is under 6 years of age.