Jannali is located 28 kilometres south of the Sydney central business district in the local government area of the Sutherland Shire.

Jannali is an Aboriginal word, meaning the Place of the Moon, originating from an unknown language as recorded by George Thornton.

This attracted residents to the suburb and many more homes were built after World War II when blocks of land were offered to returned servicemen.

This bridge provides the only link for both automotive and pedestrian movement between the eastern and western portions of the Jannali community.

A small group of business are situated in Jannali Avenue on the western side of the railway line, as is Sutherland Shire Council's Kurranulla Aboriginal Resources Centre and the community hall.

The St George & Sutherland Community College (SGSCC) is housed in the former Jannali Girls High School grounds.

The local rugby league team is the Como-Jannali Crocodiles who are based at Scylla Bay Oval in nearby Como.

The centre closed in 2001, the squash boom having long ended, however during its time, the Jannali Squash Club rose to be one of the strongest in the country, winning several men's and women's first-grade premierships and at times reaching over 200 playing members from Jannali and neighbouring suburbs.