| NCAA Season 81 | |
| General | |
| Tagline: | One @ 81: Values Formation Through Sports |
| Host: | Colegio de San Juan de Letran |
| League: | NCAA |
| Prev: | 80 |
| Seasonlist: | List of NCAA Philippines seasons |
| Next: | 82 |
NCAA Season 81 was the 2005–06 season of the National Collegiate Athletic Association (Philippines). Colegio de San Juan de Letran was the season's host.
To usher in the new season, Letran and the other NCAA member schools performed the opening ceremonies at the Araneta Coliseum, followed by four basketball games on June 25, 2005. Other disciplines started their own tournaments within the following months, with beach volleyball as the last tournament on mid-March.
De La Salle-College of Saint Benilde won its first General Championship honors for the Seniors division, while the San Sebastian Recoletos High School won its second Juniors General Championship, via tiebreakers, when La Salle Green Hills emerged with an equal number of points.
See main article: NCAA Season 81 basketball tournaments.
Arranged by order of conclusion:
| Event | Champion | 1st Runner Up | 2nd Runner Up | |
|---|---|---|---|---|
| First Semester Events | ||||
| Swimming | LSGH | UPHSD | San Sebastian | |
| Basketball | San Sebastian | San Beda | PCU | |
| Volleyball | San Sebastian | LSGH | PCU | |
| Chess | San Sebastian | PCU | Letran | |
| Taekwondo | Letran | LSGH | PCU | |
| Second Semester Events | ||||
| Table Tennis | Letran | San Sebastian | LSGH | |
| Football | LSGH | San Beda | Letran | |
| Tennis | San Sebastian | San Beda | UPHSD | |
| Track & Field | LSGH | Letran | PCU |
| Event | Champion | 1st Runner Up | 2nd Runner Up | |
|---|---|---|---|---|
| First Semester Events | ||||
| Swimming | San Beda | PCU | St. Benilde | |
| Cheerleading¹ | UPHSD | San Sebastian | Letran | |
| Basketball | Letran | PCU | Mapua | |
| Men's Volleyball | PCU | San Sebastian | Letran | |
| Women's Volleyball | San Sebastian | PCU | Letran | |
| Chess | St. Benilde | Mapua | Letran | |
| Second Semester Events | ||||
| Taekwondo | San Beda | St. Benilde | Letran | |
| Men's Table Tennis | St. Benilde | Letran | San Sebastian | |
| Women's Table Tennis | St. Benilde | PCU | Letran | |
| Football | San Beda | St. Benilde | Mapua | |
| Tennis | San Sebastian | San Beda | PCU | |
| Men's Beach Volley | St. Benilde | Letran | PCU | |
| Women's Beach Volley | St. Benilde | San Sebastian | Letran & PCU (tied) | |
| Track & Field | PCU | Mapua | San Sebastian |
See main article: NCAA General Championship.
| Rank | School | Points | |
|---|---|---|---|
| 1st | St. Benilde | 233 | |
| 2nd | PCU | 207.5 | |
| 3rd | San Sebastian | 192.5 | |
| 4th | Letran | 168 | |
| 5th | San Beda | 136 | |
| 6th | Mapua | 78 | |
| 7th | UPHSD | 40 | |
| 8th | JRU | 11 |
| Rank | School | Points | |
|---|---|---|---|
| 1st | San Sebastian¹ | 170 | |
| 2nd | LSGH¹ | 170 | |
| 3rd | Letran | 127 | |
| 4th | PCU | 93 | |
| 5th | San Beda | 88 | |
| 6th | UPHSD | 70 | |
| 7th | JRU | 22 | |
| 8th | Mapua² | 0 |