Farias was key in forcing a May 24 bi-partisan compromise over a bill that would have scaled back a program that provides tuition exemptions to Veterans.
In an interview with the San Antonio Express-News, Farias said he was stepping down to care for his wife, who is handicapped.
"She's allowed me to continue to serve these last couple of terms," Farias told the newspaper.
Farias is a lifelong resident of House District 118, which encompasses parts of the South Side, South Bexar County and stretching north, surrounding an area around Randolph Air Force Base.
He's a graduate of McCollum High School and volunteered for the Army in 1968, serving in Vietnam and in Berlin, Germany.
When Farias announced his resignation, his fellow legislators expressed their appreciation.