The noble mouse-like hamster or the noble calomyscus,[1][2] (Calomyscus grandis) is a species of mouse-like hamster from Iran.

It is the largest species of Calomyscus and was initially described as a subspecies of Calomyscus bailwardi.

[3] The animal is found in the region near Tehran and is identifiable based on its large size (74–91 mm) and soft, buffy, brown dorsal pelage.

[3] The American Society of Mammalogists as well as Musser and Carleton[2] recognize C. grandis as a distinct species.

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