Middleholm, also known as Midland Isle, is a small island lying off southwest Pembrokeshire in Wales, between the island of Skomer and the mainland in the community of Marloes and St Brides.

It is roughly circular with a diameter of about 1,210 feet (370 m)[1] and an area of 21.5 acres (8.7 ha).

[3] The name Middleholm was documented in 1325 in the reign of Edward III, when ferreters were paid for catching rabbits.

The island has been in use for considerably longer, with traces of Iron Age walling, and may have been used for summer grazing, despite the lack of natural fresh water.

[4] The name Midland Isle has been used at least as far back as 1578, when it was abbreviated in Latin as Midlan Insul.