Ossifying lipoma is a rare benign tumor, and most of the previously reported ossifying lipomas have been found in the head and neck region. We report here on the case of a 35-year-old female with an ossifying lipoma in the inguinal region. To the best of our knowledge, this case of ossifying lipoma may be the first one that's occurred in the inguinal region. Here we present the CT and MR imaging findings of ossifying lipoma and we correlate them with the pathologic findings. We discuss making the differential diagnosis of this rare lipoma variant lesion according to this lesion's characteristic findings on the CT and MR, and we correlate these findings with the histopathology.