Look up Southern Ireland in Wiktionary, the free dictionary.
Southern Ireland, South Ireland or South of Ireland may refer to:
- The southern part of the island of Ireland
- Republic of Ireland, which is sometimes inaccurately referred to as "Southern Ireland"
- Southern Ireland (1921–1922), a former constituent part of the United Kingdom
- South (European Parliament constituency)
- Southern, IE05, one of the level 2 NUTS statistical regions of Ireland