The City of Casey is the most populous and second fastest growing Local Government Area (LGA) in Victoria. It has well established urban areas with significant heritage value and a green peri-urban growth front making Casey a fast changing, vibrant and diverse city to live in.

As of 2023, the total population forecasted for Casey is 392,217 people, which is an increase of 11,300 people from the previous year. Casey is expected to experience continued growth with a total population of 403,842 in 2024, increasing to 551,304 in 2041.