Lennon had scored two goals in 12 appearances for the Liverpool U23 side this season.
"I'm really happy to be back for this year," Lennon said.
"I think it's going to be a good year with a good group of guys. I'm excited and I think this group can go far."
Excited to announce that I will be joining @RealSaltLake on a season-long loan from @LFC . Ready to get to work with the RSL Family #MLS
— Brooks Lennon (@brookslennon) February 6, 2017