Between 1905 and 1912, Toronto expanded its boundaries by annexing several neighboring areas to accommodate the city's growing population and development needs. The areas annexed during that period include:

1. 1908:
   • The South Junction Triangle, a portion of the West Toronto Junction (the village of West Toronto had been annexed in 1909 which was not during the specified timeframe, but relevant to the Junction area).
2. 1909:
   • Rosedale, a wealthy enclave known for its park-like setting.
   • Mimico, a small community to the west of the city, although it was mostly industrial land.
3. 1910:
   • Davenport and Dovercourt, both predominantly working-class areas.
   • Also during this year, the Central View Lawn, another small district, was annexed.
4. 1912:
   • The Islands, a group of islands in Lake Ontario, previously governed separately, were brought into the city fold.

These annexations were part of Toronto's broader strategy to unify the rapidly expanding urban and suburban regions into one municipal entity, aiming to improve infrastructure, service delivery, and urban planning across the city. This expansion reflected the city's transition from a collection of towns and separate communities into a single metropolis.