Nephin Beg

{{Use dmy dates|date=November 2021}}

{{Use Hiberno-English|date=November 2021}}

{{Infobox mountain

| name = Nephin Beg

| other_name = Néifinn Bheag

| photo = On Cruckgarru - view towards Nephin Beg - geograph.org.uk - 6330403.jpg

| photo_caption = Nephin Beg seen from its southern shoulder Cruckgarru

| elevation_m = 627

| elevation_ref = {{cite web |title=Nephin Beg |url=https://mountainviews.ie/summit/233/ |website=MountainViews |access-date=4 February 2025}}

| prominence_m = 365

| location = County Mayo, Ireland

| range = Nephin Beg Range

| coordinates = {{coord|54.0304|-9.6618|type:mountain}}

| map = island of Ireland

| map_relief = yes

| map_caption = Location in Ireland

| topo =

| type =

| age =

| first_ascent =

| easiest_route =

}}

Nephin Beg or Nefin Beg ({{langx|ga|Néifinn Bheag}}) is a mountain with a height of {{Convert|627|m||0}} in the Nephin Beg Range in County Mayo, Ireland. It is within Wild Nephin National Park. It seems to be named after the larger mountain Nephin (beag meaning 'little' or 'lesser'), although that mountain is some distance away and there are intervening mountains between them.{{cite web |last1=Tempan |first1=Paul |title=Irish Hill and Mountain Names |url=https://mountainviews.ie/resources/names/List2010/MVHillList09.pdf |website=MountainViews |date=2010}} Nephin Beg is also called {{lang|ga|Corr na gCapall}}, 'rounded/pointed mountain of the horse'.