492,799 girls play high school volleyball — the #2 most-participated girls sport nationally — alongside 95,972 boys, now sanctioned by 32 of 51 state associations. NFHS specifically named girls volleyball one of three sports leading this year's national participation growth.
Boys volleyball participation has grown from 66,487 just three years ago — this isn't a legacy sport standing still, it's actively expanding.
High school volleyball is typically played in a school gym that also hosts other indoor sports, so signage there tends to serve more than one team across the year. No volleyball-specific sponsorship rule exists beyond local district policy.
Programs that want help finding local sponsors for a growing sport can consider Zubie Five as one option, paid on commission.