Tees Valley population is 677k. I think Boro fans would be at least 20% and we definitely have fans outside the area. I think our ticket sales for Wembley show that we have at least 40k fans that would go, even if not regularly, probably closer to 50k. The number of people that would actually class themselves as a Boro fan would be much higher.Nah, I think Viv is more accurate with his estimate. I'd bet there's no more than 100k who would describe themseleves as "a boro fan".
The reality is that no one really knows, probably least of all the club.
There is a big difference between someone who would describe themselves as a Boro fan and someone who will spend money on club merchandise and attending matches of course and the 50k suggested is probably much closer to the market size of Boro fans.
This number should have been much higher. We were at the forefront when the PL was becoming a global brand. We were one of the top teams, star players, playing in Europe and we failed to grow the fanbase outside of Teesside and even actively made decisions to put fans off if they couldn't see the Riverside from their bedroom window.