What are the average Elo and USCF ratings? - Chess Stack Exchange

I'm not sure if there exists an average, but what could be considered an average rating range in these systems?

CheckRaiseMate's Blog • How Elo Ratings Actually Work •

Two opening repertoires: one against much stronger opponents, and one against much weaker opponents - Chess Forums

On Chess.com, are the ratings at different time limits roughly equivalent? - Quora

Chess Ratings - All You Need to Know

data request - Searching for a dataset about chess ELO rating distribution broken down by gender - Open Data Stack Exchange

How do we know that Stockfish elo is 3400? Is it just an approximation? - Quora

statistics - Distribution of Elo ratings - Chess Stack Exchange

How long will it take me to achieve 2000 chess Elo? - Quora

What is the key difference between a chess player rated 2200 and 2500? - Quora

Why is it that, even though I have a rating of 2100 on Chess.com, I still feel that any common chess player could beat me? - Quora

Current average chess rating - Chess Forums

statistics - Distribution of Elo ratings - Chess Stack Exchange