Glencullen or Glencullin (Irish: Gleann Chuilinn, meaning 'glen of the holly') is a rural area which spans two townlands in the parish of Kiltane in County Mayo, Ireland.

[1][2][3][4] Glencullen (or Glencullin) Lower is not heavily populated, with just 12 residents as of the 2011 census.

At the top of the glen is Barnaglanna and Bouleyanlobane, usually called Buaile where in the past, "people from inside the Mullet came to graze their cattle in summer time".

[7] A landslide disaster struck this townland on 22 February 1931 when Lough Boleynagee, a lake 516 feet (157 m) above sea level and overlooking Glencullen Upper, slid down the hillside, pushing mountains of soft bog in front of it.

Lough Bouleynagee, a well known resting and feeding place for overwintering brent geese, was drained of all its water and on its bottom lay little but dead trout.

John Sweeney, the inspector, reported that the school's teacher was Thomas Mc Nulty (1843–?).

Thomas Mc Nulty's teaching ability was poor according to records, but no better could be found.

Owing to the untidy appearance of the place and the un-plastered state of the walls I recommend that the salary be granted on the condition that these defects be remedied before the 15th March.

Thomas McNulty received £17 a year for his efforts and local contribution to the school was £2.13.0.

Friar Michael Munnelly managed to re-open the school in 1869 and this time it was given Roll no.

In 1887 there is a grant of £185 for Glencullen for the building of a new school on the same site as the previous ones to accommodate 60 pupils.

Michael Henry had attended St. Patrick's Training College in Drumcondra from 1907 to 1909.

At the evening classes newspapers were read and discussed and letters were written to distant relatives.