Location and coordinates are for the approximate centre of Grendon Underwood within this administrative area. Geographic features and populated places may cross administrative borders.
Gazetteer of the British Isles (Edinburgh: Bartholomew, 1887). John Bartholomew
Grendon Underwood, par. and vil., in co. and 8 miles S. of Buckingham, 2536 ac., pop. 365; P.O.