Aspidomorphus muelleri, also known commonly as Müller's crown snake and Müller's crowned snake, is a species of venomous snake in the subfamily Hydrophiinae of the family Elapidae. The species is native to Oceania. There are three recognized subspecies.
The specific name, muelleri, is in honor of German naturalist Salomon Müller.
Aspidomorphus muelleri may attain a total length of , including a tail length of . It has six upper labials, the third and fourth in contact with the eye. The dorsal scales are arranged in 15 rows at midbody. The anal plate is divided.
Aspidomorphus muelleri is found in Indonesia and Papua New Guinea.
The preferred natural habitats of Aspidomorphus muelleri are forest, shrubland, and grassland, at elevations of .
Aspidomorphus muelleri is terrestrial.
Aspidomorphus muelleri is oviparous.
The following three subspecies of Aspidomorphus muelleri are recognized as being valid, including the nominotypical subspecies.