The 2019 Miami Open (sponsored by Itaú) was a professional men and women's tennis tournament played on outdoor hard courts that started on March 18, 2019, and ended on March 31, 2019.

It was the 35th edition of the Miami Open, and part of the Masters 1000 category on the 2019 ATP Tour, and of the Premier Mandatory category on the 2019 WTA Tour.

This was the first time the tournament took place at the Hard Rock Stadium in Miami Gardens, Florida, United States.

† The player is entitled to use an exemption to skip the tournament and substitute his 18th best result (45 points in each case) in its stead.

‡ The player did not qualify for the main draw based on his ranking at the entry cutoff date and only withdrew from the alternates list.