| Teamname: | High School Old Boys RFC |
| Countryflag: | New Zealand |
| Nickname: | Old Boys (unofficial) |
| Founded: | 1901 |
| Location: | Christchurch, New Zealand |
| President: | Macca McLennan |
| Url: | www.oldboys.co.nz/ |
| Colours: | White Jersey, white shorts & black socks with blue tops |
| Pattern La1: | _whiteshoulders |
| Pattern B1: | _whiteshoulders |
| Leftarm1: | FFFFFF |
| Body1: | FFFFFF |
| Rightarm1: | FFFFFF |
| Shorts1: | FFFFFF |
| Socks1: | 000000 |
| Rugby Director: | Jamie "Livo" Livingstone |
| Captain: | Alex Newfield |
High School Old Boys is a rugby union football club based in Christchurch, New Zealand. The club was founded in 1901 by former students of Christchurch Boys' High School (CBHS). While many members are former CBHS students, High School Old Boys RFC is an open club accepting both male and female players. The club is affiliated with the Canterbury Rugby Football Union.
The official name of the club is the "Christchurch High School Old Boys Rugby Football Club". This is generally shortened to "High School Old Boys" (HSOB) and the club is commonly referred to simply as "Old Boys" or the "Polar Bears" due to their full white playing uniform and notoriously cold home fields.
The High School Old Boys clubrooms are located in Hagley Park adjacent to the Bob Deans Playing Fields on North Hagley Park, 12 Riccarton Avenue, Christchurch
Old Boys colours are: White jersey, white shorts and black socks with blue tops
A number of New Zealand representatives, called All Blacks, have been selected for international duties while affiliated to the club. Before the advent of professionalism in 1996, international players would appear for their clubs regularly in New Zealand, but since the introduction of Super Rugby, most professional players play for their clubs only rarely.
In 2022 HSOB Rugby also had their first Black Ferns (NZ Women's) player with World Cup winning Full Back Renee Holmes
CRUSADERS
Hurricanes
Highlanders
Blues