Semir Osmanagić (born June 1, 1960 in Zenica, Bosnia and Herzegovina, SFR Yugoslavia), also known as Sam Osmanagich is an author and contractor in metalworking residing in Houston.

Osmanagić was contacted in April 2005 by Visoko Museum director Senad Hodović and began an investigation of Visočica hill. He has subsequently wrote a book promoting the claim that it was in fact the remains of an ancient pyramid, one of what he claimed were several Bosnian pyramids, and established a charitable foundation to fund the promotion and investigation of the site.