Boosted by the home wins against Birmingham City and Wolves plus some knowing that by attending the game tonight they are guaranteeing themselves a seat for the Sixth Round against Chelsea if City win, the club had sold 19,200 by this morning and is expecting a big walk up tonight.
According to the club website, City supports account for 97% of all tickets sold so far.
Supporters are advised to arrive early and you can still pay on the gate.
City's record attendance at the Ricoh Arena for an FA Cup tie is 28,120 against Middlesbrough in 2006.