2017 Thai League 4 Western Region is the 5th season of the League competition since its establishment in 2013. It is in the 4th tier of the Thai football league system.
Four club was promoted to the 2017 Thai League 3 Southern Region.
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In the third leg, the winner on head-to-head result of the first and the second leg will be home team. If head-to-head result are tie, must to find the home team from head-to-head goals different. If all of head-to-head still tie, must to find the home team from penalty kickoff on the end of each second leg match (This penalty kickoff don't bring to calculate points on league table, it's only the process to find the home team on third leg).