The population of Si Wilai District is 38,899.
Si Wilai District was created in 1988.
Si Wilai's population is 10,846.
The population of Si That District is 47,888.
Si Thep District's population is 63,300.
Si Rattana District's population is 51,933.
The population of Si Nakhon District is 27,374.
Si Sawat District's population is 23,700.
The population of Si Racha District is 167,896.
Si Chomphu District's population is 78,220.
Si Sakhon District's population is 31,576.
Lak Si District's population is 117,163.
The population of Si Prachan District is 64,995.