The Mass Ave Cultural Arts District, colloquially known as Mass Ave, is one of seven designated cultural districts in Indianapolis, Indiana, United States.

The avenue is one of the four original diagonal streets included in Alexander Ralston's plan of 1821.

It offers some of the city's most visible theaters and art galleries as well as a number of shops and eateries.

[1] Gentrification in the 1990s propelled the area from squalor to one of the city's more fashionable addresses.

Currently, redevelopment of Mass Ave focuses on fostering locally owned shops, theaters, and restaurants.