In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Iwerne Stepleton like this:
IWERNE-STEEPLETON, or PRESTON, a parish in Blandford district, Dorset; on the rivulet Iwerne, 271/2 miles E of Shillingstone r. station, and 3½ NW of Blandford-Forum. Post town, lwerne-Courtnay, under Blandford. Acres, 773. Real property, £773. Pop., 59. Houses, 9. Steepleton House is a chief residence. The living is a rectory in the diocese of Salisbury. Value, £81. Patron, Lord Rivers. The church is ancient.
A Vision of Britain through Time includes a large library of local statistics for administrative units. For the best overall sense of how the area containing Iwerne Stepleton has changed, please see our redistricted information for the modern district of North Dorset. More detailed statistical data are available under Units and statistics, which includes both administrative units covering Iwerne Stepleton and units named after it.
GB Historical GIS / University of Portsmouth, History of Iwerne Stepleton in North Dorset | Map and description, A Vision of Britain through Time.
Date accessed: 19th January 2017
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Iwerne Stepleton".