List of surviving Uchiha
The following:


Uchiha Itachi - Who performed the massacre. Was killed later by Sasuke (according to his plan), then reanimated, eventually to die again (permanently, this time).
Uchiha Sasuke - Who was spared by Itachi in hopes of making him strong. Still alive.


That's about it from the traditional ones.


Madara Uchiha - Who was dead during the massacre, was also later reanimated.
Uchiha Obito also survived the massacre, in fact, he helped Itachi execute it (as Tobi).


And also


   Sarada Uchiha, Sasuke's and Sakura's daughter, also counts for the purposes of this list.