Haley has teased her presidential run for weeks, including a tweeted video this week in which she said: "It's time for a new generation to lead."
Aides are putting together a Feb. 15 announcement event in Charleston, S.C., according to three sources familiar with her plans who spoke to USA TODAY on condition of anonymity.
Teasing her announcement on Twitter, Haley said: "My family and I have a big announcement to share with you on February 15th! And yes, it’s definitely going to be a Great Day in South Carolina!"