The Four Nations of the United Kingdom: Ranked by Size

The United Kingdom comprises four constituent countries—often called "home nations"—ordered here by land area:

1. England — 130,279 km² (50,301 sq mi) — 84% of UK population (56M+)
2. Scotland — 77,933 km² (30,090 sq mi) — 9% of population (5.5M)
3. Wales — 20,779 km² (8,023 sq mi) — 5% of population (3.1M)
4. Northern Ireland — 14,130 km² (5,456 sq mi) — 3% of population (1.9M)

Key Distinctions

England has no devolved legislature (UK Parliament legislates directly). Scotland, Wales, Northern Ireland have devolved parliaments/assemblies with varying powers (health, education, justice, taxation).

The term "kingdom" in the prompt is colloquial—only the UK as a whole is a kingdom. The four are countries within a unitary sovereign state (though Scotland's 1707 Treaty of Union preserved its distinct legal/education/church systems).

Geographic Nuance

Including offshore islands: Scotland gains significantly (Hebrides, Orkney, Shetland). England includes Isle of Wight, Scilly. Wales includes Anglesey. Northern Ireland includes Rathlin.