EXHIBIT 21

Subsidiaries of Jacksonville Bancorp, Inc.

Subsidiaries of Jacksonville Bancorp, Inc.

The Jacksonville Bank, a non-member banking corporation organized in the State of Florida

Atlantic BancGroup, Inc. Statutory Trust I, a Delaware statutory trust

Jacksonville Statutory Trust I, a Delaware statutory trust

Jacksonville Statutory Trust II, a Delaware statutory trust

Jacksonville Bancorp, Inc. Statutory Trust III, a Delaware statutory trust

Subsidiaries of The Jacksonville Bank

East Arlington, Inc., a Florida corporation

Fountain Financial, Inc., a Florida corporation

Parman Place, Inc., a Florida corporation

S. PT. Properties, Inc., a Florida corporation

TJB Properties, LLC, a Florida limited liability company