FC Seoul Total attendance  &  Average attendance Total attendance  &  Average attendance

| Season | Season_Total_Att_ | K_League_Season_Total_Att_ | Regular_Season_Average_Att_ | League_Cup_Average_Att_ | FA_Cup_Total_Average_Att_ | ACL_Total_Average_Att_ | Friendly_Match_Att_ |
|---|---|---|---|---|---|---|---|
| 1984–2003 | Official attendance records don`t have credibility | Official attendance records don`t have credibility | Official attendance records don`t have credibility | Official attendance records don`t have credibility | Official attendance records don`t have credibility | Official attendance records don`t have credibility | Official attendance records don`t have credibility |
| 2004 | 223529 | 223529 | 15363 | 6529 | Undisclosed | N/A | N/A |
| 2005 | 458605 | 458605 | 22010 | 32415 | Undisclosed | N/A | Unknown ( Boca Juniors ) |
| 2006 | 302833 | 302833 | 19276 | 11921 | Undisclosed | N/A | 61,235 ( FC Tokyo ) |
| 2007 | 379903 | 379903 | 21515 | 14315 | Undisclosed | N/A | 65,000 ( Manchester United ) |