Marna may refer to:

Places

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  • Marna, Estonia, a village in Pärsti Parish in Viljandi County, Estonia
  • Marna, or Mandalselva, a river in Vest-Agder county, Norway
  • Marna, Minnesota, an unincorporated community in Faribault county, Minnesota in the United States
  • Marna, Sweden, part of a peninsula south of Sundsvall

Other

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  • MV Marna, a British coaster formerly named Empire Cliff and later named Harcliff and then MV Ricardo Manuel
  • Marnas, a god worshipped in Gaza in antiquity