The National Museum of Natural History (Bulgarian: Национален природонаучен музей, Natsionalen prirodonauchen muzey), or NMNHS, is a natural history museum in the Bulgarian capital of Sofia.

Founded in 1889, it is affiliated with the Bulgarian Academy of Sciences and is the first and largest museum of this kind on the Balkans.

[1] The Museum's collection includes over 400 stuffed mammals, over 1,200 species of birds, hundreds of thousands of insects and other invertebrates, as well as samples of about one quarter of the world's minerals.

The museum became autonomous as a separate institute within the system of BAS in 1974.

The museum publishes the monthly Historia naturalis bulgarica journal.