Other exclaves of the historic Flintshire included the manors of Marford and Hoseley, Abenbury Fechan and Bryn Estyn, all on the outskirts of Wrexham, and also a small part of the parish of Erbistock around the Boat Inn.

Additionally, a small part of Flintshire, including the village of Sealand, was isolated across the River Dee when its course was changed to improve navigation.

Flintshire was a maritime county bounded to the north by the Irish Sea, to the north-east by the Dee estuary, to the east by Cheshire and to the south and southwest by Denbighshire.

The highest point in the historic county (county top) was found within these hills at Moel Famau, height 554.8 metres (1,820 ft), a notable viewpoint topped by the ruined remains of the Jubilee Tower, built in 1810 to commemorate the golden jubilee of King George III.

The chief towns were Buckley, Connah's Quay, Flint, Hawarden, Holywell, Mold, Queensferry, and Shotton.

Places of special interest included castles in Flint, Hawarden, Rhuddlan and Ewloe, Greenfield Valley, St. Winefride's Well in Holywell and Wepre Country Park, in Connah's Quay.

[3] Additional facilities acquired included a local militia barracks (originally designed by Thomas Mainwaring Penson) which was converted for use as council offices in the late 1880s.