A number of insects, like ants, bees and termites, create the equivalent of settlements (mounds and hives) and have structured societies, so to speak. Some termite mounds are very big, so maybe you could call it a city.
Whether what they have could be analogous to our economy is debatable, since they all work to feed their respective collectives and never engage in any form of trade with different communities, though they may fight
Under normal circumstances, a colony would be the place where the ant population lives, the number of queens just has to be equal or greater than 1, as they can have multiple in a single place.
This supercolony is, from what I understood, a huge quantity of colonies that are interconnected, so you could trek from Portugal to Italy entirely within its tunnels, kinda like a state or country connected by roads
I got distracted and forgot to look it up....thanks ADHD....
In 2000, an enormous supercolony of Argentine ants was found in Southern Europe (report published in 2002).[15] Of 33 ant populations tested along the 6,004-kilometre (3,731 mi) stretch along the Mediterranean and Atlantic coasts in Southern Europe, 30 belonged to one supercolony with estimated millions of nests and billions of workers, interspersed with three populations of another supercolony.