2010–11 Isthmian League

Premier Division

The Premier Division consisted of 22 clubs, including 17 clubs from the previous season, and five new clubs:

Sutton United won the division and were promoted back to the Conference South at the third attempt after two play-off defeats, along with play-off winners Tonbridge Angels. Maidstone United, Croydon Athletic, and Folkestone Invicta were relegated while Aveley were reprieved due to Rushden & Diamonds and Ilkeston Town folding in the Football Conference.

League table

Source:
^‡ Croydon Athletic were deducted three points for fielding an ineligible player against Folkestone Invicta on 21 August (2–0).
Rules for classification: 1) points; 2) goal difference; 3) number of goals scored
(C) = Champion; (R) = Relegated; (P) = Promoted; (E) = Eliminated; (O) = Play-off winner; (A) = Advances to a further round.
Only applicable when the season is not finished:
(Q) = Qualified to the phase of tournament indicated; (TQ) = Qualified to tournament, but not yet to the particular phase indicated; (RQ) = Qualified to the relegation tournament indicated; (DQ) = Disqualified from tournament.

Results grid

Updated to games played on 30 April 2011.
Source: Ryman League Premier Division
1 ^{^} The home team is listed in the left-hand column.
Colours: Blue = home team win; Yellow = draw; Red = away team win.

Division One North

Division One North consisted of 22 clubs, including 18 clubs from the previous season, and four new clubs:

Leyton withdrew from Division One North on 14 January 2011, but expressed a wish to retain a team in the Youth League. At a meeting on 20 February this proposal was rejected and the club was expelled from the League. The club's record of P19 W1 D6 L12 GF13 GA45 Pts9 was expunged on 24 February.

East Thurrock United won the division and were promoted back to the Premier Division after two seasons of absence along with play-off winners Wingate & Finchley. Waltham Forest were reprieved due to clubs folding higher up the pyramid, so no teams were relegated from the division this season.

League table

Source:
Rules for classification: 1) points; 2) goal difference; 3) number of goals scored
(C) = Champion; (R) = Relegated; (P) = Promoted; (E) = Eliminated; (O) = Play-off winner; (A) = Advances to a further round.
Only applicable when the season is not finished:
(Q) = Qualified to the phase of tournament indicated; (TQ) = Qualified to tournament, but not yet to the particular phase indicated; (RQ) = Qualified to the relegation tournament indicated; (DQ) = Disqualified from tournament.

Results grid

Updated to games played on 30 April 2011.
Source: Ryman League Division One North
1 ^{^} The home team is listed in the left-hand column.
Colours: Blue = home team win; Yellow = draw; Red = away team win.

Division One South

Division One South consisted of 22 clubs, including 19 clubs from the previous season, and three new clubs:

Metropolitan Police won the division and were promoted to the Premier Division along with play-off winners Leatherhead. Bognor Regis Town missed out on the title by a single goal after a draw against Chatham Town on the final day of the season. The draw was not enough for Chatham Town to escape the relegation zone although they were later reprieved due to clubs folding higher up the pyramid. So, Horsham YMCA were the only team relegated from the Isthmian League this season.

League table

Source:
^‡ Merstham were deducted one point for fielding an ineligible player against Worthing on 26 February (3–3).
Rules for classification: 1) points; 2) goal difference; 3) number of goals scored
(C) = Champion; (R) = Relegated; (P) = Promoted; (E) = Eliminated; (O) = Play-off winner; (A) = Advances to a further round.
Only applicable when the season is not finished:
(Q) = Qualified to the phase of tournament indicated; (TQ) = Qualified to tournament, but not yet to the particular phase indicated; (RQ) = Qualified to the relegation tournament indicated; (DQ) = Disqualified from tournament.

Results grid

Updated to games played on 30 April 2011.
Source: Ryman League Division One South
1 ^{^} The home team is listed in the left-hand column.
Colours: Blue = home team win; Yellow = draw; Red = away team win.

League Cup

The Isthmian League Cup 2010–11 (billed as the Championship Manager Cup 2010–11 for sponsorship reasons) is the 37th season of the Isthmian League Cup, the cup competition of the whole Isthmian League. Sixty-six clubs took part.

First round

Four clubs from division Ones participated in the First round, while all other clubs received a bye to the Second round.

Second round

The two clubs to have made it through the First round were entered into the draw with every other Isthmian League club, making sixty-four teams.