Thomas Barker Mellor (1849 - 5 September 1915) was a photographer and organist who worked in Derbyshire from around the mid 1860s to 1913. He was born in Belper in 1849, the son of John Mellor (1812-1900) and Jane Barker. His brother, Albert Mellor became organist of Windsor Parish Church and was a professor at Eton College. He received his musical education under Mr. W. W. Woodward, organist of St Mary's Church, Derby. He started as organist at Christ Church, Belper, around 1862 and in 1871 he succeeded W. A. Shaw as organist of St Peter's Church, Belper, a position he held until 1877.