The "30-minute city" where residents can get to major job hubs and key services within half an hour remains out of reach for most of Sydney’s population.

A new 30-minute Index for Sydney which ranks the city's best connected localities is dominated by neighbourhoods in and around the CBD although the south-western suburbs of Kogarah, Lakemba and Liverpool were ranked among the city's 50 most accessible areas.

The index ranks suburbs according to accessibility to jobs, shops, hospitals and schools to show which areas "make the best '30-minute neighbourhoods'".

The map below shows how neighbourhoods across Greater Sydney were ranked: