Trinity College Dublin remains Ireland's highest-ranked university.
The college is among two third-level institutions in Ireland which have increased their positions in the latest Times World University Rankings.
However, three Irish universities have dropped places this year.
Now in its 17th year, the Times World University Rankings includes more than 1,500 institutions, ranking them on things like teaching, research and international outlook.
Nine Irish universities are in this year's list.
Trinity College Dublin is the country's highest-ranked university and has jumped nine places to 155th place.
The Royal College of Surgeons is second and remains in the top 250.
UCD, which is in third position, has dropped out of that group this year, and now sits in the 251 to 300 category.
NUIG has also fallen out of the top 300, sitting just outside along with UCC.
The largest drop seen by an Irish university this year is Maynooth, which has gone from the 301 to 350 category to the 401 to 500 grouping.
DCU is now into the top 600 along with UL, while Technology University Dublin still sits inside the top 1,000.
Globally, Oxford University in England has retained top spot for the fifth consecutive year, while the US has eight of the top ten institutions.
Reporting by Adrian Harmon
