2018–19 Southern Combination Football League Premier Division

The Premier Division consists of 20 clubs, the same as last season, after Worthing United and Littlehampton Town were relegated to Division One, and Haywards Heath Town and Three Bridges were promoted to Isthmian League Division One South.

Four clubs joined the division:
 * Langney Wanderers – promoted from Division One
 * Lingfield – promoted from Division One
 * Little Common – promoted from Division One
 * Shoreham – relegated from Isthmian League Division One South