| Errew | |
| Native Name: | Irish: An tOireamh |
| Native Name Lang: | ga |
| Settlement Type: | Village |
| Pushpin Map: | Ireland |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Ireland |
| Subdivision Type: | Country |
| Subdivision Name: | Ireland |
| Subdivision Type1: | Province |
| Subdivision Name1: | Connacht |
| Subdivision Type3: | County |
| Subdivision Name3: | County Mayo |
| Unit Pref: | Metric |
| Population Density Km2: | auto |
| Utc Offset1: | +0 |
| Timezone1 Dst: | IST (WEST) |
| Utc Offset1 Dst: | -1 |
| Coordinates: | 53.795°N -9.265°W |
| Blank Name: | Irish Grid Reference |
Errew [1] is a small rural settlement, about 8 km south from the county town of Castlebar, County Mayo, Ireland.
The history of Errew follows the Franciscan monastery which was established in 1879 as a boys school which closed in 1975, the church in the monastery remained open until 1981. There are 22 Brothers buried in the Monastery cemetery.[2]
Gilla Áedha Ua Maigín, Bishop of Cork (died 1172), is noted in the Annals of the Four Masters as "of the family of Errew of Lough Con."
Errew has a national school, and as well as a number of archaeological sites, such as forts, souterrains and fairy forts.