2009–10 Sussex County Football League

The 2009–10 Sussex County Football League season was the 85th in the history of Sussex County Football League a football competition in England.

Division One
Division One featured 16 clubs which competed in the division last season, along with four new clubs.
 * Clubs promoted from Division Two:
 * Crawley Down
 * Mile Oak
 * Peacehaven & Telscombe
 * Plus:
 * Crowborough Athletic, relegated from the Isthmian League

Also, Chichester City United changed name to Chichester City.

Division Two
Division Two featured 13 clubs which competed in the division last season, along with five new clubs.
 * Clubs relegated from Division One:
 * East Preston
 * Oakwood
 * Worthing United
 * Clubs promoted from Division Three:
 * Clymping
 * Little Common

Division Three
Division Three featured twelve clubs which competed in the division last season, along with three new clubs:
 * Bexhill United, relegated from Division Two
 * Sidlesham, relegated from Division Two
 * T D Shipley, joined from the West Sussex League