YWCA Blue Triangle Residence Hall, Historic residence hall in Indianapolis, United States.

The YWCA Blue Triangle Residence Hall is a five-story, L-plan building of red brick on a raised brick-faced foundation, designed by Rubush & Hunter and built in 1924. Its steel frame carries Classical Revival detailing, and the central entrance has a carved limestone surround. It stands at 725 North Pennsylvania Street in Indianapolis.

The building was constructed in 1924 by architects Rubush & Hunter to provide housing for single women during a period of social change. It emerged when such facilities played a key role in supporting working women in urban areas.

The residence hall represents an era when organizations built dedicated spaces to support women's economic independence in cities. It shows how urban centers once created housing specifically for working women living on their own.

The building now operates as transitional housing with 96 units and provides job training services. Visitors should know it remains an active social facility that can be viewed from outside.

The building's name comes from the Blue Triangle, a YWCA program for young working women; its 1924 steel frame let Rubush & Hunter fit five storeys of rooms onto a narrow L-shaped downtown lot.