Which countries does not have a coalition government?

Countries without coalition governments typically have a dominant political party that secures a majority in the legislature, allowing it to form a government independently. Examples include the United States, where the two-party system often results in one party controlling both the presidency and Congress, and the United Kingdom, where the Conservative or Labour party can achieve a majority in the House of Commons. Additionally, countries like China and Russia operate under single-party systems, further eliminating the need for coalition governments.