The 2017–18 Southern Counties East Football League season was the 52nd in the history of the Southern Counties East Football League, a football competition in England, and was the second year the competition has two divisions, the Premier Division and Division One.
The constitution for Step 5 and Step 6 divisions for 2017–18 was announced on 26 May 2017.
[1] The Premier Division consisted of 17 clubs from the previous season along with three new clubs:
Division One consisted of 16 clubs from the previous season along with three new clubs: Also, Eltham Palace changed their name to Stansfeld.