Djouce (Irish: Dioghais, meaning 'fortified height') at 725 metres (2,379 ft), is the 74th–highest peak in Ireland on the Arderin scale, and the 91st–highest peak on the Vandeleur-Lynam scale. Djouce is situated in the northeastern section of the Wicklow Mountains, and dominates the views of the Wicklow Mountains from Roundwood to Newtownmountkennedy. Djouce is one of a few Irish mountains for which the Irish Office of Public Works (OPW) maintain a boarded mountain trail, using railway sleepers, from its base to a point close to its summit; making the mountain even more accessible to the public, but while also protecting the underlying bog and soil from human erosion. Djouce is popular with hill walkers, and it lies along the 131-kilometre Wicklow Way; on its southern slopes at a scenic viewpoint is the J.B. Malone memorial stone, dedicated to the creator of the Wicklow Way.

According to Irish academic Paul Tempan, Djouce is sometimes referred to Dowse in historical sources. Tempan notes that the old Irish word for "dígas" is high or lofty, but that while a "Sliab Digsa" is mentioned in the Metrical Dindshenchas, the second word is interpreted as a woman's name; potentially showing the meaning of "dígas" was unclear even at the time of the Metrical Dindshenchas (12th-century). The OSI Map uses the term Djouce Mountain.

The River Dargle rises on the northern flank of the mountain, close to the source of the River Liffey in the Featherbeds; they rise either side of the catchment boundary, the Liffey flowing west and the Dargle flowing east. Powerscourt Waterfall, one of the highest waterfall in Ireland, lies on its eastern slope.

Djouce overlooks to the west the highlands around the Sally Gap; to the east the Roundwood / Calary Bog plateau. It also overlooks the corrie lake of Lough Tay to the southwest. It is bounded to the west by the R115; to the south by the R759 and to the west by the R755.

Its southern and eastern flanks are heavily forested, up to and above the 2,000 feet contour, mainly with Sitka spruce plantations. As these trees are clear-felled (when they mature), a policy of the reinstatement of native tree species is being pursued, either through planting or natural regeneration.

Djouce's southern shoulder is called White Hill 630 metres (2,070 ft), and to the north of Djouce, across a small saddle is War Hill 686 metres (2,251 ft)

Djouce's prominence of 200 metres (660 ft) qualifies it as a Marilyn, and it also ranks it as the 42nd-highest mountain in Ireland on the MountainViews Online Database, 100 Highest Irish Mountains, where the minimum prominence threshold is 100 metres.

Djouce is a popular destination for hillwalkers due to its accessibility and views offered.