Here’s a selection of National semi-finals including Celtic, and the attendance from that game (total, not just Celtic fans): 2011/12 Scottish Cup vs Hearts: 36,600 2011/12 League Cup vs Falkirk: 30,000 2012/13 League Cup vs St Mirren: 24,400 2012/13 Scottish Cup vs Dundee United: 24,800 2014/15 Scottish Cup vs Inverness: 28,600 2015/16 League Cup vs Ross County: 22,100 2017/18 League Cup vs Hibs: 39,800