The Republic of Ireland has several football teams that compete in the League of Ireland, the country's top tier of football. Some of the most popular teams in the Republic of Ireland include:
Shamrock Rovers
Bohemian F.C.
St Patrick's Athletic F.C.
Cork City F.C.
Derry City F.C.
Dundalk F.C.
In Northern Ireland, football is governed by the Northern Ireland Football Association (IFA), which is a member of both UEFA and FIFA. The top tier of football in Northern Ireland is the NIFL Premiership. Some of the most popular teams in Northern Ireland include:
Linfield F.C.
Glentoran F.C.
Coleraine F.C.
Crusaders F.C.
Cliftonville F.C.
Portadown F.C.
As both Northern Ireland and the Republic of Ireland are home to several successful football teams, it cannot be said that there is a single favorite team for the whole country.