* China (People's Republic of China): Putonghua is the official language, and it is used in government, education, and media.
* Singapore: Mandarin is one of four official languages, alongside English, Malay, and Tamil.
* Taiwan (Republic of China): While Taiwan officially uses "Guoyu" (National Language), which is based on the Mandarin dialect of Beijing, it's functionally the same as Putonghua.
It's important to note that:
* Mandarin is a dialect, not a distinct language. It's one of many dialects spoken within the broader Chinese language family.
* Many other countries have significant Mandarin-speaking populations due to immigration and cultural influence, such as the United States, Canada, Malaysia, and Australia.
Therefore, it's more accurate to say that Mandarin is the official language of China, Singapore, and Taiwan (under the name "Guoyu"), and it is widely spoken in many other countries around the world.