Martlesham is a village in Suffolk, England about two miles (3 km) South-West of Woodbridge and East of Ipswich. It is often referred to as "old Martlesham" by locals in order to distinguish this old village from the much more recent Martlesham Heath development (1 km) to the south although both form a single administrative parish. Also at Martlesham Heath is BT's Research and Development Centre, now called Adastral Park.
Martlesham was recorded in Domesday Book as Merlesham. The history and meaning of the name are studied in a paper by Briggs. It probably means `settlement (hām) near the mooring-place (mǣrels)'.