Hypericum hirsutum is a species of flowering plant in the family Hypericaceae, commonly known as hairy St John's-wort.

It has erect stems and opposite pairs of untoothed, elongated oval leaves with translucent glandular dots.

It is uncommon and localised in Finland which is to the north of its European range[4] In Britain it is a widespread species except for the far north and west[5] while it is rare and localised in Ireland being found at only two sites in Northern Ireland and with its Irish range centred around County Dublin.

[6] Hypericum hirsutum is a perennial herb which prefers free-draining, neutral to base-rich soils.

It grows in open or partially shaded habitats such as rough and ungrazed grassland, clearings and rides in woodland, on the banks of rivers and road verges.