Polis. The word means "city" in Greek. It also refers to the citizens of the city. And when we're talking city here, we're talking city-state. So the polis is both place and people.
It is also the root word for politic. Politics. Political. Politicians.
Politics is the means by which the people decide how they wish to live in their city - um, city-state - er, country. And whenever someone takes part in making those decisions, they are, ipso facto, a politician. Read more about Polis