| Clubname: | Rijnsburgse Boys |
| Fullname: | Rijnsburgse Boys |
| Nickname: | Uien (Onions) |
| Ground: | Middelmors, Rijnsburg |
| Capacity: | 5,000 |
| Chairman: | Peter Zandbergen |
| Manager: | Henk Wisman |
| Current: | 2023–24 Tweede Divisie |
| Pattern La1: | _black_stripes |
| Pattern B1: | _blackstripes |
| Pattern Ra1: | _black_stripes |
| Leftarm1: | FFDD00 |
| Body1: | FFDD00 |
| Rightarm1: | FFDD00 |
| Shorts1: | 000000 |
| Socks1: | 000000 |
Rijnsburgse Boys is a football club based in Rijnsburg, Netherlands. The team compete in the Tweede Divisie, the third level of the Dutch football league system.
The club was established on 24 March 1930. They currently play in the Tweede Divisie. The club won the Saturday Hoofdklasse A title in the 2005–06, 2006–07 and 2008–09 seasons.
Since being founded in 1930 till 1957, the club has played on several locations in Rijnsburg. Since 1957 the club moved to Sportpark Middelmors, where it's still playing their homegames. The unofficial nickname of Rijnsburgse Boys is 'uien' - Dutch for "onions" - originating from the late 1500s, when Rijnsburg was famous for its onion farms.
The club has always been one of the most successful clubs in the Dutch amateur football. After losing a decision match in the 2015–16 season against GVVV (1–2), the club did not play first amateur-tier in a long time. In the 2016–17 season, Rijnsburg defeated Westlandia and SV Spakenburg to promote to the Tweede Divisie, the highest tier for non-pro teams.
Rijnsburgse Boys' first year in the Tweede Divisie was quite a success. The squad, managed by Pieter Mulders finished 5th in the top flight of non-pro football.