The 36-year-old businessman took to his Twitter account to share the news on Wednesday, writing: "Its a girl!!!! @MrsVanessaTrump and I are very excited to be bringing home our little bundle of joy today," along with the hashtag "#FullHouse."
Donald Trump's eldest son revealed his daughter's name in a subsequent tweet, explaining that "Chloe Sophia is now sleeping on my belly after a hectic afternoon meeting her sister and brothers. #iloveit"
The new baby will join siblings Kai Madison, 7, Donald John III, 5, Tristan Milos, 2, and Spencer Frederick, 20 months.
Chloe is the seventh grandchild of business magnate Donald Trump.