Ivy Julia Cromartie Stranahan (February 24, 1881 – August 30, 1971) was an American philanthropist heavily involved with the Seminoles of Southern Florida.

During one part of her childhood, the family lived near a settlement named Owens on the Peace River around 15 miles (24 km) from Arcadia.

The pair courted, and after she returned to Lemon City at the end of the school year, she accepted Stranahan's proposal of marriage.

[4] By 1924, the expansion of Fort Lauderdale had begun in earnest and there was pressure for the Seminoles to move to the approved area set aside as a reservation.

Ivy arranged for the Seminoles to be paid to make the Reservation habitable, and began transporting work parties to and from the location.

She arranged for timber to be delivered courtesy of the Indian Commissioner at Fort Myers and by the end of the year several homes, a school and an administrative building had been built on the site and all the Seminoles had moved.

Together they sought to stem the growing alcohol issue in the Seminoles by educating the women about the problems it could bring.