Most of the time, people is the correct word to choose as a plural for person. Persons is archaic, and it is safe to avoid using it, except in legal writing, which has its own traditional language. Peoples is only necessary when you refer to distinct ethnic groups (for example, within the same region).

“People” is the plural form, making “people’s” the plural possessive form. “Peoples” is only used when referring to the plural of a group of people within a country or community. It’s rare to ever come across “peoples'” as the plural possessive form. If in doubt, use “people’s.”

People’s is the possessive of the word people — the plural of person. In contrast, peoples’ is the possessive of the word peoples — used to refer to groups of people. Both words are plural nouns, and both are in the possessive form. People’s should be used when denoting ownership of a group and peoples’ when denoting ownership of multiple groups.

Peoples is the plural for people when you are speaking of multiple groups of ethnically diverse people. People’s is the singular possessive form of people. Peoples’ is the plural possessive form of People. Peoples or People’s or Peoples’ are all pronounced the same way. Because “Peoples” is usually singular, people’s’ is usually correct.

The primary difference between people’s and peoples ‘ is the context in which they occur. People’s and peoples’ are possessive noun forms. While people’s is the possessive of the word people, peoples’ is the possessive of the word peoples – the plural of people.