At the Armistice, Mill Road Cemetery contained 260 burials, but was then greatly enlarged when graves were brought in from the battlefields of Beaumont-Hamel and Thiepval and from the following smaller cemeteries:
- Divion Road Cemetery, No.1, 400 metres south of St. Pierre-Divion, contained the graves of 29 soldiers who fell in July and September 1916
- Divion Road Cemetery, No.3 (No.2 was concentrated to Connaught Cemetery), close to No.1, contained the graves of 44 soldiers who fell in September and October 1916.
- Mill Road Cemetery, No.1, close to the present Mill Road Cemetery. It contained the graves of 39 soldiers who fell in September 1916.
- St. Pierre-Divion Cemetery, No.2 (No.1 was concentrated to Connaught Cemetery), on the more northerly road from St. Pierre-Divion to Thiepval, contained the graves of 28 soldiers who fell in September-November 1916.
There are now 1,304 Commonwealth servicemen of the First World War buried or commemorated in Mill Road Cemetery.
815 of the burials are unidentified but there are special memorials to three casualties believed to be buried among them and three others buried in Divion Road Cemetery No.1, whose graves were destroyed by shell fire.
The cemetery was designed by Sir Herbert Baker and covers an area of 4,099 square yards.
Mill Road Cemetery suffers an unusual problem. During the fighting the area was riddled with tunnels. Many of these remain today making the whole area liable to subsidence. The problem is so acute in part of the cemetery that the headstones are laid flat because originally they kept falling over.
