Washington has missed the past two games with a separated right shoulder.
Additionally, FSU returns senior receiver Craphonso Thorpe and senior offensive lineman Bobby Meeks. Thorpe served a one-game suspension last week against Duke, while Meeks was held out due to injury.
Defensively, senior Jerome Carter also says he will return after injuring a shoulder on the game's fifth play against the Blue Devils.
Washington's return, however, is especially needed due to the Seminoles' sluggish road starts this season.
FSU also knows its showdown at North Carolina State could be a low-scoring game. N.C. State is allowing just 241.6 total yards per-game, which is No. 2 nationally among 117 Division I-A teams. FSU is seventh in that category, yielding 275.2.
In rushing defense, the Seminoles are No. 2 nationally (66.2 yards) while N.C. State is No.24 (116.4).
"He brings leadership, experience and he's a big-time playmaker," FSU quarterback Wyatt Sexton said of Washington.
"He's a real physical running back so sometimes when there's not a hole there and things aren't going right, he's capable of making something happening for us to get us rolling."
FSU needs to get rolling early against the Wolfpack. Sexton, like his teammates, can't figure out the Seminoles' slow starts on the road.
"We are in a hotel all day, not in a comfortable setting. We feel a little out of place on the road for some reason. Hopefully, we can rid that this week," Sexton said.
Of course, N.C. State is coached by former FSU assistant coach Chuck Amato, who often returns to Tallahassee.
"He was one of the more animated coaches," Sexton said.
"He actually lived in the same neighborhood as a friend of mine. I used to go hang out at his house, hang out with this (twin) daughters.
"So, I definitely have a small history with coach Amato. he actually recruited me when I was in high school as well and I got to know him even better through that. I just have a lot of respect for that man."