The Boise meridian is one of the 35 principal meridians of the Public Land Survey System of the United States. Adopted in 1867, its longitude is 116° 23′ 35″ (or 116° 24′ 15″) west from Greenwich and its principal baseline is latitude 43° 22′ 21″ north. The meridian and baseline intersect approximately 19 miles (31 km) from Boise, between the Snake River and the Boise River. The Boise meridian governs land surveys in the state of Idaho.

The city of Meridian, Idaho lies directly on the meridian and is a namesake of the meridian.

• List of principal and guide meridians and base lines of the United States

• "Boise Meridian, Kuna, Idaho". Principal Meridian Project. Retrieved 2012-09-26.
• "Boise Meridian". The Center for Land Use Interpretation. Retrieved 2012-09-26.
• "Idaho". U.S. Bureau of Land Management. Archived from the original on 2012-10-07. Retrieved 2012-09-26.
• "Cadastral Survey: Principal Meridians and Base Lines". U.S. Bureau of Land Management. Archived from the original on 2012-10-18. Retrieved 2012-09-26.
• "Initial Point". U.S. Bureau of Land Management. Archived from the original on 2015-03-24. Retrieved 2012-10-07.
• U.S. Geological Survey Geographic Names Information System: Initial Point

43°22′19.25″N 116°23′38.65″W / 43.3720139°N 116.3940694°W / 43.3720139; -116.3940694