Michael Rogers Oldfield Thomas (1858 - 1929) was a British zoologist.

Thomas worked at the Natural History Museum on mammals, describing about 2,000 new species and sub-species for the first time. He was appointed to the Museum Secretary's office in 1876, transferring to the Zoological Department in 1878. In 1891 Thomas married an heiress to a small fortune, which gave him the finances to hire mammal collectors and present their specimens to the museum. In 1896 when William Henry Flower took control of the Department he hired Richard Lydekker to rearrange the exhibitions, allowing Thomas to concentrate these new specimens.

Reference

• The Natural History Museum at South Kensington, William T. Stearn ISBN 0434736007