*Counts each time an agency and/or subagency was sued. Suing an agency official along with the agency is only counted once.
| FY 2011
 Rank
 | Organization | Number FOIA Suits Filed* | Percent Change | 
| FY 2010 | FY 2011 | FY 2011 vs. FY 2010 | 
|  | Total (All Agencies) | 417 | 457 | 9.6% | 
| 1 | Department of Veterans Affairs | 5 | 9 | 80.0% | 
| 2 | Central Intelligence Agency | 10 | 16 | 60.0% | 
| 2 | Social Security Administration | 5 | 8 | 60.0% | 
| 4 | U.S. Department of Labor | 9 | 13 | 44.4% | 
| 5 | Department of Homeland Security | 47 | 64 | 36.2% | 
| 6 | U.S. Department of Agriculture | 9 | 12 | 33.3% | 
| 7 | U.S. Environmental Protection Agency | 8 | 10 | 25.0% | 
| 8 | Department of Defense | 46 | 55 | 19.6% | 
| 9 | Department of Health and Human Services | 24 | 28 | 16.7% | 
| 10 | U.S. Department of Justice | 133 | 147 | 10.5% | 
| 11 | Department of Commerce | 7 | 7 | 0.0% | 
| 12 | Department of State | 22 | 18 | -18.2% | 
| 13 | United States Department of the Treasury | 33 | 20 | -39.4% | 
| 14 | Office of the Director of National Intelligence | 5 | 3 | -40.0% | 
| 14 | Securities and Exchange Commission | 5 | 3 | -40.0% | 
| 16 | U.S. Department of the Interior | 23 | 12 | -47.8% | 
| 17 | Federal Reserve Board | 6 | 2 | -66.7% | 
| Not Ranked:  Agencies with fewer than 5 FOIA suits in FY 2010 in name order |  |  |  | 
|  | Council on Environmental Quality | 1 | 0 | -100.0% | 
|  | Department of Education | 3 | 8 | 166.7% | 
|  | Department of Energy | 3 | 6 | 100.0% | 
|  | Department of Housing and Urban Development | 4 | 10 | 150.0% | 
|  | Department of Transportation | 2 | 1 | -50.0% | 
|  | Executive Office of the President, Office of Management and    Budget | 1 | 3 | 200.0% | 
|  | Federal Communications Commission | 3 | 2 | -33.3% | 
|  | Federal Deposit Insurance Corporation | 1 | 0 | -100.0% | 
|  | Federal Energy Regulatory Commission | 1 | 0 | -100.0% | 
|  | Federal Housing Finance Agency | 1 | 0 | -100.0% | 
|  | Federal Trade Commission | 0 | 1 | – | 
|  | Legal Services Corporation | 0 | 1 | – | 
|  | Merit Systems Protection Board | 0 | 1 | – | 
|  | National Aeronautics and Space Administration (NASA) | 4 | 4 | 0.0% | 
|  | National Archives & Records Administration | 0 | 2 | – | 
|  | National Credit Union Administration | 0 | 1 | – | 
|  | National Labor Relations Board | 1 | 3 | 200.0% | 
|  | National Science Foundation | 0 | 2 | – | 
|  | National Transportation Safety Board | 1 | 0 | -100.0% | 
|  | Office of Personnel Management | 4 | 2 | -50.0% | 
|  | Office of Science and Technology Policy | 0 | 1 | – | 
|  | Office of the U.S. Trade Representative | 0 | 1 | – | 
|  | Peace Corps | 0 | 1 | – | 
|  | Pension Benefit Guaranty     Corporation | 1 | 0 | -100.0% | 
|  | U.S Office of Special Counsel | 2 | 0 | -100.0% | 
|  | U.S. Consumer Product Safety Commission | 0 | 1 | – | 
|  | U.S. General Services Administration | 1 | 0 | -100.0% | 
|  | U.S. Small Business Administration | 1 | 1 | 0.0% | 
|  | United States Agency for International Development | 2 | 1 | -50.0% | 
|  | United States Equal Employment Opportunity Commission | 1 | 2 | 100.0% | 
|  | United States Postal Service | 1 | 1 | 0.0% | 
|  | Unites States Section, International Boundary and Water    Commission | 1 | 2 | 100.0% |