This is an atlas of the developing ferret brain over the postnatal day (P)8 to P38 age range. It consists of T2-weighted MRI brain templates derived from 10 animals (5 male, 5 female), each scanned at ages P8, P14, P20, P26, P32, and P38. The templates have been annotated with atlas labels for 12-14 brain regions, depending on the age. The images used to generate templates were acquired using a 12T horizontal bore small-animal imaging system and a single-channel surface coil radiofrequency receiver. Image resolution consisted of isotropic 0.25 mm-sided voxels. Addition details are described in a manuscript that is currently under review (to be updated after the review is complete).