Seventeen of the clubs competed in the previous season and they were joined by Hythe Town from the Kent County Amateur League.
[1] The league was won by Faversham Town, they had been champions seven seasons previously.
The two lowest ranked non-reserve clubs, Slade Green Athletic and Kent Police, were re-elected to continue their membership of the league which was now named Division One.
[4] The 1977–78 Kent Football League Challenge Cup was won by Tunbridge Wells, their second win in four seasons.
[5] The competition, contested by all eighteen clubs in the league, comprised five single match tie rounds (with the first round featuring two ties) culminating in the final which was played on a neutral ground (at Sittingbourne[6] this season).