The newest estimate shows the population dropped by more than 16,000 residents between July of 2022 and July of 2023.
That number takes into account births, deaths and people moving in or out of the city.
It marks the third straight year of declines.
It represents about a 1% drop over that timeframe and more than a 3% drop since April of 2020, which is right after the pandemic started.
Philadelphia's population, as of last summer, stood at 1.550 million people.