If both parties are Maryland residents, the Plaintiff (person seeking support) may file for child support or alimony in the county where the Defendant (intended payor of support) resides, carries on business, is employed or habitually engages in business.
In addition, in a divorce action, the Plaintiff may file for support in the county where the Plaintiff resides or, in a custody action, the Plaintiff may file for support in the county where either parent or child resides.
If the Defendant is not a Maryland resident, the Plaintiff can seek support in Maryland if:
1) The Defendant is personally served with suit papers;
2) The Plaintiff resides in Maryland when suit is filed; and
3) Maryland was either the matrimonial domicile of the parties immediately before their separation or the obligation to pay support arose under the laws of Maryland or under an Agreement executed by one of the parties in Maryland.