Season 2009-10: FL One Dec 05 Elland Road Huddersfield Town (H) 2-2 (D) Snodgrass, Gradel 36,723 FL One May 08 Elland Road Bristol Rovers (H) 2-1 (W) Howson, Beckford 38,234 are two that come to mind.
Highest ever attendance in the third tier of English football: December 26th 1979, Sheffield Wednesday 4 v 0 Sheffield United, att 49,309.