Lynn L. Loud Jr. is one of the main characters from the Nickelodeon animated series The Loud House. She is the fifth-oldest of Lincoln Loud's ten sisters and is named after their father, Lynn Loud Sr. Lynn Jr. is a very energetic, athletic girl who enjoys playing every sport that exists, and even making a sport out of everything else she does. She tends to start competitions among or pick fights with her siblings, and is also quite superstitious.
As one of the show's main characters, Lynn appears prominently in the show's Christmas episode, "11 Louds a Leapin'". For much of the episode, Lynn and her younger sister Lucy search all over the house, trying to find where their parents have hidden their presents. When Lincoln tells the sisters about how Mr. Grouse is unable to spend Christmas with his own family, Lynn realizes that she's had her mind on the wrong priorities, and takes part in cheering up their neighbor by giving him a bus card and spending Christmas Eve with him. At the end of the episode, it is shown that Lynn received a new pair of sport shoes for Christmas.
In the online-exclusive Loud House short "12 Days of Christmas", in which the Loud family sings their version of the titular song, Lynn's line is "five goals to score", referring to scoring five goals in hockey.