Christian Gustav Wilhelm Müller (17 February 1857, Mühlberg near Erfurt – 18 February 1940) was a German zoologist specializing in Ostracoda.
In 1895 he succeeded Carl Eduard Adolph Gerstaecker as director of the zoological museum at Greifswald, a position he maintained until 1923.He was the taxonomic authority of numerous taxa in Ostracoda; a few examples being the subfamily Conchoeciinae and the genera Archiconchoecia, Cytherois and Stenocypria.
In 1965, the genus Muellerina Bassiouni (family Hemicytheridae) was named in his honor.