Ivy Julia Cromartie Stranahan (1881–1971) was an American philanthropist heavily involved with the Seminoles of Southern Florida. She trained as a teacher initially, but after marrying Frank Stranahan, she settled permanently in Fort Lauderdale. While there, she began supporting the rights of the Seminoles and aiding them in moving to an Indian reservation. She is closely associated with the Friends of the Florida Seminoles, an organisation through which she sought to support the education of Seminole children, build homes and eventually to support themselves fully.

Stranahan House is the home of Fort Lauderdale pioneers Frank and Ivy Stranahan. Built in 1901 as a trading post and converted into a residence for the Stranahans in 1906, the house is the oldest surviving structure in Broward County. It was placed on the National Register of Historic Places in 1973 and today operates as a historic house museum. The House is open for guided tours at 1, 2, or 3 p.m. most Tuesdays through Fridays, and hosts special events throughout the year. Check their website for availability.