Found this on Origin’s official Facebook page:
What an great Origins! We want to say a huge thank you to the fans who come out and support us each year. So from the staff, volunteers, exhibitors and our show co-sponsor, Mayfair Games, THANK YOU!
· Unique attendance 15,480
· Turnstile attendance was 52,561
The article I linked a couple days ago counts Origins 2015 attendance at 15,938, which means this year attendance actually dropped a small amount (~ 3%). Personally, I see this as very good news. A small but steady growth would probably be better, but maintaining the current size is vastly preferable to the explosive growth GenCon has seen in the last 5 years (GenCon has literally doubled in size between 2010 and 2015 [src]).