5th meridian may refer to:

• 5th meridian east, a line of longitude east of the Greenwich Meridian
• 5th meridian west, a line of longitude west of the Greenwich Meridian
• The Fifth principal meridian in Arkansas, Iowa, Minnesota, Mississippi, North Dakota and South Dakota, United States, 91°03'42" west of Greenwich
• The Fifth Meridian of the Dominion Land Survey in Canada, 114° west of Greenwich
• Meridian 5; the fifth satellite in the Meridian series of communications satellites

This disambiguation page lists articles associated with the title 5th meridian.
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