* The size of Semaphore is approximately 1.1 square kilometres.

It has 2 parks covering nearly 12.8% of total area.

The population of Semaphore in 2011 was 2,825 people.

By 2016 the population was 2,779 showing a population decline of 1.6% in the area during that time.

The predominant age group in Semaphore is 50-59 years.

Households in Semaphore are primarily couples with children and are likely to be repaying $1800 – $2399 per month on mortgage repayments.

In general, people in Semaphore work in a professional occupation.

In 2011, 65.4% of the homes in Semaphore were owner-occupied compared with 67.3% in 2016.

Currently the median sales price of houses in the area is $635,000.