The Caves of Kesh, also known as the Keash Caves or the Caves of Keshcorran (Irish: Uaimheanna na Céise), are a series of limestone caves located near the village of Keash, County Sligo, Ireland. The caves are situated on the west side of Keshcorran Hill (part of the Bricklieve Mountains) and consist of sixteen simple chambers, some interconnecting.

The caves have been used by man over several millennia, and it has long been suggested that they were the site of ancient religious practice or gathering such as Lughnasadh.

Excavations carried out in the early 20th century, particularly those by Robert Francis Scharff, discovered significant animal remains. Among others, these included bones of brown bear, arctic lemming, Irish elk, and grey wolf.

The sixteen interconnecting caves of white cherty limestone are found at the base of a line of low cliffs, on the western slope of the hill. They were formed from the atmospheric weathering of carboniferous limestone, and run perpendicular to the rock face. Quartz crystals are abundant, and glacial boulder-beds can be found at the mouth of some of the caves, showing that Keshcorran was at one time buried beneath an ice sheet. The caves bear evidence of being washed out by water, and a layer of breccia containing limestone blocks can be found in many of them. Stalagmite floors are rare, and when present appear to have been burrowed into by foxes and badgers.

The first thorough exploration of the caves at Keshcorran occurred during five weeks in 1901, and was initiated after a portion of a bear's skull had been discovered some years earlier. These excavations, headed by Robert Francis Scharff, R. J. Ussher, and Robert Lloyd Praeger, recovered bones of deer, ox, goat, pig, bear, horse, sheep, donkey, hare, mouse, rat, badger, fox, dog, wolf, and stoat. For the first time in Ireland, evidence of the Arctic lemming was also discovered, drawing headlines around the country. Another important recovery was that of a metacarpus of reindeer, discovered above an area of burnt charcoal. This suggests that reindeer in Ireland survived until the human period.

Also recovered from the excavations were the four oldest species of molluscs found in Ireland at the time, the remains of several fish, and numerous species of bird, most notably the ptarmigan, smew, and little auk. Another recovery of note was that of several fossilised frog bones found in the lowest stratum, which disproved a common belief that the species had only been introduced in 1699.

Finally, the excavations found evidence of occasional human habitation going as far back as the Neolithic, with more regular occupation being identified from the 10th century onward. Five human teeth and the humerus of a male were found in the caves, and man-made artefacts that were recovered include two bone needles, a bone comb, a stone celt, an iron saw, two bronze pins, and a stone axe of adze type. Shells of mussel and oyster were also found, further supporting human settlement.

Further explorations took place in 1929 and 1930, and these led to the recovery of more bones of lemming, reindeer, mouse, pig, hare, horse, frog, rabbit, sheep, fox, stoat, bear, dog, ox, badger and rat. The excavations also discovered remains of elk, cat, shrew, and duck.