Boulder Geomagnetic Observatory

{{Short description|Geomagnetic observation facility near Boulder, Colorado}}

{{Coord|display=title|40.137558|-105.237875|format=dms}}

Boulder Geomagnetic Observatory (BOU) is a geomagnetic observation facility operated by the United States Geological Survey (USGS). It is located near Boulder, Colorado at {{Coord|display=inline|40.137558|-105.237875|format=dms}}. The site was established in 1961.

Customers of the observatory include the Space Weather Prediction Center (SWPC) and the Air Force Weather Agency (AFWA).