Fena may refer to:

• FENA, the Federal News Agency of the republic of Bosnia and Herzegovina
• Fractional sodium excretion (FE_Na), a medical parameter representing the fraction of sodium in urine relative to the fraction of sodium in circulation
• Fena Lake, the largest lake on the island of Guam
• Jack Fena (1923-2010), American politician and judge
• Lori Fena (born 1961), American internet activist, entrepreneur, and author

• Ryan PT-16
• Ryan PT-20
• Ryan PT-21
• Ryan PT-22
• Ryan PT-22 Recruit
• Ryan PT-25
• Ryan Raburn
• Ryan Radmanovich
• Ryan Reynolds
• Ryan Riddle
• Ryan Sakoda
• Ryan Schreiber
• Ryan's Daughter
• Ryan's Fancy
• Ryan Shamrock
• Ryan Sharp
• Ryan Sheckler
• Ryan Shoulders
• Ryan Shuck
• Ryan Shupe & the RubberBand
• Ryan Smith (footballer)
• Ryan Smyth
• Ryan Sook
• Ryan ST
• Ryan Starr