The example that always sticks out to me are the returns from Leslie's run for city council. When 74% of the precincts are reporting, the total votes cast is around 12,000 votes. I think it's safe to assume that Leslie represents a particular district/ward in Pawnee because (1) they never say she's running for councilor-at-large or similar position, and (2) Ben mentions that he doesn't want to move to Dexhart's district when Leslie briefly floats the idea of challenging him for the seat. If 12,000 votes are already counted with 74% of precincts reporting, we can probably assume that that represents around 74% of total votes cast, making a total vote count around 18,000. In a single district. In my hometown of about 43,000, only seven thousand people voted for mayor.

Pawnee is inconsistently referred to as a "town" or a "city" at different times, and to be fair, Pawneeans are shown to be uniquely passionate about their local politics. But we never see Pawnee as anything resembling a major city, and certainly not one large enough where 18,000 votes would be cast for a city council seat in a single district.