Exhibit 21

SUBSIDIARIES OF HARTE-HANKS, INC.

As of December 31,
2010



|                                                   |  |                              |  |         
|-------------------------------------------------- |  | ---------------------------- |  | --------
|Name of Entity                                     |  | Jurisdiction of Organization |  | % Owned 
|Aberdeen Group, Inc.                               |  | Massachusetts                |  | 100%    
|Avellino Technologies, Inc.                        |  | Delaware                     |  | 100%(1) 
|Global Address Inc.                                |  | Utah                         |  | 100%(13)
|Global Address Ltd                                 |  | United Kingdom               |  | 100%(13)
|Harte-Hanks CRM Services Belgium NV                |  | Belgium                      |  | 100%(2) 
|Harte-Hanks Data Services LLC                      |  | Maryland                     |  | 100%    
|Harte-Hanks Data Technologies, Inc.                |  | Delaware                     |  | 100%    
|Harte-Hanks Direct, Inc.                           |  | New York                     |  | 100%(10)
|Harte-Hanks Direct Marketing/Baltimore, Inc.       |  | Maryland                     |  | 100%    
|Harte-Hanks Direct Marketing/Cincinnati, Inc.      |  | Ohio                         |  | 100%    
|Harte-Hanks Direct Marketing/Dallas, Inc.          |  | Delaware                     |  | 100%(12)
|Harte-Hanks Direct Marketing/Fullerton, Inc.       |  | California                   |  | 100%    
|Harte-Hanks Direct Marketing/Jacksonville, LLC     |  | Delaware                     |  | 100%(8) 
|Harte-Hanks Direct Marketing/Kansas City, LLC      |  | Delaware                     |  | 100%(7) 
|Harte-Hanks do Brazil Consultoria e Servicos Ltda. |  | Brazil                       |  | 100%(5) 
|Harte-Hanks Flyer, Inc.                            |  | Delaware                     |  | 100%    
|Harte-Hanks Global Address Limited                 |  | United Kingdom               |  | 100%(9) 
|Harte-Hanks Market Intelligence, Inc.              |  | California                   |  | 100%    
|Harte-Hanks Market Intelligence Espana LLC         |  | Colorado                     |  | 100%    
|Harte-Hanks Market Intelligence Europe B.V.        |  | Netherlands                  |  | 100%    
|Harte-Hanks Market Intelligence GmbH               |  | Germany                      |  | 100%(4) 
|Harte-Hanks Market Intelligence SAS                |  | France                       |  | 100%(4) 
|Harte-Hanks NDC, LLC                               |  | Delaware                     |  | 100%    
|Harte-Hanks Philippines, Inc.                      |  | Philippines                  |  | 100%    
|Harte-Hanks Print, Inc.                            |  | New Jersey                   |  | 100%    
|Harte-Hanks Pty. Limited                           |  | Australia                    |  | 100%(3) 
|Harte-Hanks Response Management/Austin, Inc.       |  | Delaware                     |  | 100%(12)
|Harte-Hanks Response Management/Boston, Inc.       |  | Massachusetts                |  | 100%    
|Harte-Hanks Shoppers, Inc.                         |  | California                   |  | 100%    
|Harte-Hanks SRL                                    |  | Romania                      |  | 100%(9) 
|Harte-Hanks Stock Plan, Inc.                       |  | Delaware                     |  | 100%    
|Harte-Hanks STS, Inc.                              |  | Delaware                     |  | 100%    
|Harte-Hanks Teleservices, LLC                      |  | Delaware                     |  | 100%(6) 
|Harte-Hanks Trillium Software Germany GmbH         |  | Germany                      |  | 100%(11)
|Harte-Hanks Trillium UK Limited                    |  | United Kingdom               |  | 100%(9) 
|Harte-Hanks UK Limited                             |  | United Kingdom               |  | 100%(3) 
|HTS, Inc.                                          |  | Connecticut                  |  | 100%    
|Information Arts (UK) Limited                      |  | England and Wales            |  | 100%(9) 
|Mason Zimbler Limited                              |  | England and Wales            |  | 100%(9) 
|NSO, Inc.                                          |  | Ohio                         |  | 100%    
|Sales Support Services, Inc.                       |  | New Jersey                   |  | 100%    
|Southern Comprint Co.                              |  | California                   |  | 100%    
|S&D Marketing Limited                              |  | England and Wales            |  | 100%(14)



|(1) | Owned by Harte-Hanks Trillium UK Limited
|--- | ----------------------------------------

|(2) | 99.84% Owned by Harte-Hanks, Inc.
|--- | ---------------------------------

| | 0.16% Owned by Harte-Hanks Direct, Inc.
| | ---------------------------------------

|(3) | Owned by Harte-Hanks Data Technologies, Inc.
|--- | --------------------------------------------

|(4) | Owned by Harte-Hanks Market Intelligence Europe B.V.
|--- | ----------------------------------------------------

|(5) | 99.999% Owned by Harte-Hanks Data Technologies, Inc.
|--- | ----------------------------------------------------

| | .001% Owned by Harte-Hanks Stock Plan, Inc.
| | -------------------------------------------

|(6) | Owned by Harte-Hanks Direct, Inc.
|--- | ---------------------------------

|(7) | Owned by Sales Support Services, Inc.
|--- | -------------------------------------

|(8) | Owned by Harte-Hanks Flyer, Inc.
|--- | --------------------------------

|(9) | Owned by Harte-Hanks UK Limited
|--- | -------------------------------





|(10) | Owned by Harte-Hanks Print, Inc.
|---- | --------------------------------

|(11) | Owned by Harte-Hanks Market Intelligence GmbH
|---- | ---------------------------------------------

|(12) | Owned by Harte-Hanks Stock Plan, Inc.
|---- | -------------------------------------

|(13) | Owned by Harte-Hanks Global Address Limited
|---- | -------------------------------------------

|(14) | Owned by Mason Zimbler Limited
|---- | ------------------------------