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According to the [[United States Census Bureau|U.S. Census Bureau]], the county has a total area of 894 [[square kilometre|km²]] (345 [[square mile|mi²]]). 557 km² (215 mi²) of it is land and 336 km² (130 mi²) of it is water. The total area is 37.65% water.

== Local Government == === County Government === Calvert County is governed by a board of 5 elected [[Calvert County Commissioners|commissioners]]. The County Seat is located in [[Prince Frederick, Maryland]]. See [[:Category:Calvert County Government]]. === State Government === The county is partially within [[Legislative District 27]] and [[Legislative District 29]] and falls within three sub-districts: 27A, 27B, and 29C. The State Senator for District 27 is [[Thomas V. Mike Miller, Jr.]]. The State Senator for District 29 is [[Roy P. Dyson]]. The delegates which represent Calvert County are: * District 27A: [[James E. Proctor, Jr.]] (D) and [[Joseph F. Vallario, Jr.]] (D)* District 27B: [[Sue Kullen]] (D)* District 29C: [[Anthony J. O'Donnell]] (R) === Federal Government === Maryland is represented in the United States Senate by [[Barbara A. Mikulski]] (D) and [[Benjamin L. Cardin]] (D). Southern Maryland falls within the [[5th Congressional District]] which is represented by [[Steny Hoyer]] (D). Hoyer also serves as the House Majority Leader, second in command to the Speaker of the House, Nancy Pelosi (D) of California.