Say the City or say the county, because locals hear the difference
The City of St. Louis is an independent city, legally separate from St. Louis County, and owners treat the two as different places rather than as center and suburb.
It is not the middle of the county, it is a different government. An owner who lives in one has almost no reason to care about a post written from inside the other, and the vocabulary gives you away in the first line.
Decide which one you actually want and let the feed show it. A firm managing brick two-families in Dogtown, Soulard and Tower Grove should look like that firm. A firm managing subdivision houses in Chesterfield and Ballwin should look like the other one.
The tell is the word metro. Nobody here uses it about their own building. An owner says the City, or says Kirkwood, or says south county, and copy that reaches for the regional word was written by somebody who has never had the conversation.
The split runs through your operations too. The offices your staff deals with, the paperwork a turn requires and where a case gets filed are not the same on both sides of the line, and an owner who hears you name the right one is hearing local knowledge instead of a claim of it.
The outer counties are a different product as well as a different government. St. Charles County and Jefferson County are largely newer frame construction, so the masonry conversation that carries a City feed lands on nobody out there, and the reverse holds just as firmly.