Achill Island in County Mayo is the largest island of Ireland, and is situated off the west coast. It has a population of 2,700. Its area is 57 square miles (148 km²). Achill is attached to the mainland by Michael Davitt Bridge, between the villages of Gob an Choire (Achill Sound) and Poll Raithní (Pollranny), so it is possible to drive onto the island. This is a causeway and swing bridge which allows the passage of small boats.

Ballina is the largest town in County Mayo in the Republic of Ireland. It lies at the mouth of the River Moy near Killala Bay, in the Moy valley, with the Ox Mountain range to the east and the Nephin Beg Mountains to the west. Ballina is in north Mayo, in the province of Connacht. The name is derived from Béal an Átha (mouth of the ford) or Béal Átha an Fheadha in Irish. According to the 2001 census, Ballina is the largest town at 1,451 hectares, compared to Castlebar at 1,099 hectares. The recorded population of Ballina's urban area is 19,478.

Ballinrobe is a town in County Mayo, Republic of Ireland. Ballinrobe is located on the River Robe, which empties into Lough Mask two kilometres to the west. Ballinrobe lies some 48 km north of Galway, on the N84 road which connects Galway to Castlebar. A bus service running three times a day between Galway and Ballina passes through Ballinrobe and Castlebar.

Ballycastle is a village in County Mayo, Republic of Ireland, situated northwest from Ballina, near Mayo's north coast in the West of Ireland. Ballycastle is also on the edge of an Irish speaking area called a Gaeltacht. Ballycastle is situated on the rugged coast of North Mayo, with its northern boundary exposed to the wild Atlantic ocean. To the west of the town are the Stags of Broadhaven (600 million years old), to the east lies Killala Bay while to the south are the towns of Crossmolina and Ballina.

Ballyhaunis is a town in County Mayo, Ireland. It is situated at the crossroads of the N60 and N83 National secondary roads and on the railway line connecting Dublin to Westport and Ballina. It is thought that the town grew up around St Mary's Augustinian Friary, founded in 1348. The town and the surrounding hinterland is steeped in history and contains one of the highest concentrations of megalithic monuments in the West of Ireland. The population of Ballyhaunis today is about 2,000.

Belmullet is a market town with a population of around 2,000 lying on The Mullet Peninsula in the barony of Erris, County Mayo, in the west of Ireland. Its name means the "mouth of the mullet". Belmullet has two bays, Blacksod Bay and Broadhaven Bay, joined by Carter's canal running through the town.

Castlebar  is the county town of, and at the centre of, County Mayo, Ireland. A campus of Galway-Mayo Institute of Technology and the Country Life section of the National Museum of Ireland are two important local amenities. The town is connected by railway to Dublin and the neighbouring Mayo towns of Westport and Ballina. The town has several small satellite villages around it, such as Breaffy. The main route by road is the N5. Its economy is primarily service based. The population at the 2006 census was 15,041 (including rural area).

Charlestown is a village in County Mayo, Republic of Ireland. It is located at the intersection of two National Primary routes, the N17 and the N5.

Claremorris is a town in County Mayo in the west of Ireland, at the junction of the N17 and the N60 national routes. It has a population of 3,170 (14,156 rural). One of the fastest growing towns in the West of Ireland,
The surrounding countryside is composed of rolling drumlins, eskers, woods and lakes. There are two secondary schools, St. Colman's College for boys, and Mount St. Michaels for girls, and many primary schools.

Cong is a village in County Galway and County Mayo, Republic of Ireland. It is located on the north shore of Lough Corrib, near the town of Ballinrobe and the villages of Neale and Cross. Cong is known for its underground streams that connect Lough Corrib with Lough Mask to the north. It was also the home of Sir William Wilde, historian and father to prominent playwright, novelist, poet, and short story writer, Oscar Wilde.

Foxford is a small town some 16 km south of Ballina in County Mayo. The town stands on the N26 national primary route from Swinford to Ballina and has a railway station served by trains between Dublin and Ballina.
Situated between the Nephin and Ox Mountains, Foxford lies on the banks of the River Moy, one of Europe's most famous salmon-fishing rivers, and close to Loughs Conn and Cullin, famous for their brown trout. The Foxford Way is an 86-km waymarked tourist trail that circles Foxford, taking in the Ox Mountains, roads, bogland, archeological sites, lakeshores, and river banks.

Killala is a village in County Mayo in the Republic of Ireland. The town is located in the West of Ireland, north of Ballina. The railway line from Dublin to Ballina once extended to Killala. To the west of Killala is Towns plots West (known locally as Enagh Beg), which contains numerous ancient forts.

Louisburgh is a small town on the southwest corner of Clew Bay. It is home to the Grace O'Malley Interpretive Centre, and close to Old Head Wood and Delphi.

Mayo or Mayo Abbey is a village in County Mayo, Ireland. Although it bears the same name as the county, it is not the county seat, which is Castlebar. Mayo Abbey is a small historic village in south Mayo approximately ten miles to the south of Castlebar and six miles north west of Claremorris.

Newport is a small town in County Mayo, Ireland. It is located on the west coast of Ireland, along the shore of Clew Bay, north of Westport. The N59 road passes through the town. Castlebar is also near the town. Newport has a very striking railway bridge (no longer used for rail carriage) like an aqueduct, which, with the Roman Catholic church on top of the hill, dominate the town and create a picturesque appearance.

Swinford is a market-town in County Mayo, Ireland. Swinford is made up of areas such as Midfield, Meelick, Culmore, the town and Killasser. It is on the N5, located 11 miles from Ireland West Airport Knock (formerly known as Knock International Airport), and 20 minutes drive from Castlebar in Ireland. Situated on a tributary of the River Moy, Swinford is known for its fishing waters, including the Callow lakes and the lakes of Conn and Cullin.

Westport is a town in County Mayo in the Republic of Ireland. It is situated on the west coast of Ireland, at the south-east corner of Clew Bay, an inlet of the Atlantic Ocean. Westport has a gracious town centre in the Georgian architectural style, as one of the few planned towns in the country (by James Wyatt in 1780). The planning of the town was commissioned by Lord Sligo of the stately home, Westport House, as a place for his workers and tenants to live. Among the picturesque features of the town are its tree-lined, flower decorated, promenade (The Mall) and several stone bridges over the river Carrow Beg.