Maria Jacquemetton (née Mastras) is a Greek American television writer and producer.

Alongside her colleagues on the writing staff she won a Writers Guild of America Award for Best New Series and was nominated for the award for Best Dramatic Series at the February 2008 ceremony for her work on the season.

She was nominated for the WGA award for Best Dramatic Series a second time at the February 2009 ceremony for her work on the second season.

[4] She won the WGA Award for Best Drama Series (after being nominated for the third consecutive year) at the February 2010 ceremony for her work on the third season.

[citation needed] Jacquemetton is the older sister of George Mastras, a novelist and scriptwriter for the AMC TV show Breaking Bad.