Christa Deanne Harmotto Dietzen (born October 12, 1986) is an American indoor volleyball player, a member of the United States women's national volleyball team and Turkey club Fenerbahce Grundig, a participant of the Olympic Games (2012, 2016), bronze medalist of the 2016 Olympic Games, 2015 World Cup, silver medalist of the 2012 Olympic Games, and a gold medalist of the 2014 World Championship.She played college volleyball at Pennsylvania State University team from 2005–2008.
At Penn State, she had a .486 hitting percentage on the year, which led the nation.
She was named the Big Ten Player of the Year in 2007, was nominated for the Honda Award in 2007 and 2008 and is a three-time AVCA All-American.