General:
* Folks
* Individuals
* Humans
* Humanity
* Mankind (can be gendered, so use with caution)
* Citizens (referring to inhabitants of a city, state, or country)
* The public
* The masses
* Society
* Population
More specific:
* Citizens (referring to inhabitants of a city, state, or country)
* Residents (referring to people who live in a particular place)
* Community (referring to a group of people living in the same place)
* Nation (referring to the people of a country)
* Tribe (referring to a group of people with a common ancestry or culture)
* Crew (referring to a group of people working together)
* Staff (referring to a group of people employed by an organization)
* Audience (referring to a group of people watching or listening to a performance or presentation)
* Team (referring to a group of people working together towards a common goal)
The best synonym will depend on the specific situation and the intended meaning.