RA (stylized as R∆) is the second studio album by American singer-songwriter and record producer Simon Curtis. It was released independently on June 7, 2011. The album peaked at number 20 on the Billboard Dance/Electronic Albums chart.

RA may refer to:

• Right ascension, an astronomical term
• Relation algebra, a type of mathematical structure

Ra (; , ) or Re (; , Re) is the ancient Egyptian sun god. By the Fifth Dynasty in the 25th and 24th centuries , he had become a major god in ancient Egyptian religion, identified primarily with the noon sun.

Ra is the Sun-god of Ancient Egypt.