Calvert-StMarys MPO, MD

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Calvert County Established 1654
  1. Calvert County
    Department of Planning & Zoning
    150 Main Street
    Prince Frederick, MD 20678
    Phone: 410-535-1600
    Phone: 301-855-1243
St. Mary's County Maryland 1637
  1. St. Mary’s County 
    Department of Land Use and Growth Management 
    23150 Leonard Hall Drive 
    PO Box 653
    Leonardtown, MD 20650
    Phone: 301-475-4200

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