Sector SL was a sector in Sri Lanka, an island country near India. Sector A was one of the nearest. All of this sector's personnel were evacuated when a sickness, released by the Teen Ninjas during the battle on accident in the Deep Sea Research Facility, infected most of the Teens and a small number of guards and scientists. After the incident, the sector's operatives returned to the sector.
- Numbuh B 1.1 - Sector leader
- Numbuh B 1.2 - operative
- Numbuh B 1.3 - operative
- Numbuh B 3.33 - 2x4 tech officer