More than 4763 species of mammals were documented in worldwide; in Pakistan, 195 species of mammals were noted; out of total, 71 species of mammals were examined in Azad Jammu and Kashmir. This study was organized at Hattian Bala. Linear count survey model was applied to identify the mammalian diversity. Data were collected through direct method alongwith indirect method. Diversity was calculated through Shannon-Wiener index. A total of 11 species were noted from Hattian Bala and Shannon-Wiener diversity Index (H’= 0.9759) was documented from Hattian Bala. During this survey noted that Asiatic Jackal (Canis aureus) was documented as the most abundant medium and large size mammalian species in study area. It is concluded that this area has rich diversity of medium and large size mammals.