Between March and June 2015 archaeological monitoring was undertaken within the graveyard of St. Peter and St. Paul's Church, Alconbury during groundworks carried out in advance of the construction of a porch extension and associated services and soakaway(s) adjacent to the North Aisle. The area cut by these groundworks proved to be densely packed with un-marked burials, amounting to 154 complete or partial skeletons identified and recorded, alongside several hundred kilos of disarticulated bone. Whilst many of these burials were likely to have been Medieval, there were a number of un-marked Post-medieval burials lying close to the church, amongst which were juveniles and infants. Of archaeological interest was the mixed incidence of Roman pot and tile, Early-Middle Saxon pottery (including sherds of a funerary urn), plus a wide range of 12-15th century Early Medieval wares. Within the area ssociated with the latter were found small fragments of a double-sided composite bone comb which may be Saxon in date, whilst just 3m to the north of this within re-deposited grave soil was found a coin of the Emperor Domitian. This coin appears to have been modified in the post-Roman (Anglo-Saxon?) period with the addition of a punched dot-ring motif, and was perhaps worn as a brooch or pendant. From the service trench excavation to the north of this came further Saxon pottery and a probable Saxon iron knife, the latter associated with a charnel spread. The finds from the excavations indicate a Roman presence nearby, and perhaps also an Anglo-Saxon settlement or church on this site.