A while back the American Volleyball Coaches Association (AVCA) put together a set of info graphics which shows how big women’s collegiate volleyball is in the States. That’s both in terms of teams and scholarship funding. Here’s what the structure looks like.
You’ll notice there were some cut-paste issue with the NCAA Division numbers. The actual D1 number is closest to correct. As of the 2017 season, there were 334 teams in Division I, 297 teams in Division II, and 444 in Division III. It was 222 for NAIA.
The NCAA and NAIA both comprise of 4-year colleges and universities.
Alas, men’s volleyball is only a fraction of the size of the women’s game.
For more info comparing US volleyball to other countries, check out this article I wrote for an Argentinian coaching magazine.