MARYLAND LAKES Flat Creek Marsh Anne Arundel County, MD BE THE FIRST TO WRITE A REVIEW SHARE THIS PAGE Flat Creek Marsh is located in Anne Arundel County, Maryland. This lake is 117 acres in size. BUY A MARYLAND FISHING LICENSE. SIZE 117 acres POST A FISHING REPORT BAROMETRICPRESSURE WEATHERINFO WIND MAP& FORECAST SUN/MOONINFO