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Child Support Administration of Maryland
The Child Support Administration (CSA) Contact Center line is: 1.800.332.6347. This number is for filing, updating and checking the status of a child support case, and asking related questions. When calling this number, please listen to all menu options, as there is an option to get through to a live person. Information is also available through the State of Maryland web site below.

Customers may also visit the CSA office in Montgomery County, located at 51 Monroe Street, 10th Floor, Rockville, MD. 20850,

Find more information from the following link(s):
  • Maryland Dept. of Human Resources


  • To speak with a Customer Service Representative, please call 311 during business hours.