Letty Green lies south of Cole Green. To the east of Letty Green is the settlement of Pipers End.
To the north of Letty Green is the Cole Green Way – the former railway line from Hertford to Luton via Welwyn Garden City. The railway was closed in the 1960’s and now forms a cycle way and bridle path.
As shown in the map above, Letty Green includes an area of grass designated as a Village Green: Letty Green.
Letty Green is also the name of the road that leads from the junction of Station Road, Chapel Lane and Woolmers Lane to the B158.