Ambleston (Welsh: Treamlod) is a village, parish, and community in Pembrokeshire, Wales, lying seven miles (11 km) north-north-east of Haverfordwest.

[2] The northern border of the parish is an ancient trackway leading towards St David's, which crosses through a Roman farmstead called "Castell Fflemish".

[3] This line is also the northern boundary of the cantref of Daugleddau, and was described by George Owen in 1602 as the language frontier, placing Ambleston in Little England beyond Wales.

A kilometer north of the village is a four-sided low bank enclosing an area some 80m across, at 51°54′14″N 4°53′53″W / 51.904°N 4.8981°W / 51.904; -4.8981 (Castle Flemish), SN007267.

These indicate a compound including a bathhouse and living area, and is considered to be a late first-century farmstead or villa.