Lynn Loud Sr.

Lynn Loud, Sr. (or Dad) is the father of Lincoln Loud and his sisters.

Personality
Lynn Sr. is stern, and often calls a halt to his kids' fights, but he loves and cares about them. He also loves his wife, and often acts playfully romantic towards her. He has been shown to have a childlike side at times, even sometimes taking part in his kids' antics, when it's all in good fun. He's also the more sensitive of the two parents, often necessitating his wife stepping in whenever he needs to pull himself together.

He's usually a good parent but two times he was shown as an abusive parent as in "April Fools Rules", he agreed to lock Luan in crate to prevent her from pulling harming pranks, and in "No Such Luck", he believed Lincoln is a badluck so he expelled him from house and disowned him by selling his furniture like he didn't expect him to return.

On a side note, he seems to enjoy jokes and dancing. He is shown to dance on occasion in episodes such as "The Loudest Yard", "Ties That Bind", "Come Sale Away", and "House Music". In addition, it is mentioned in "A Tattler's Tale" that he won a dancing contest, and had a disco ball trophy that Lincoln broke. In addition, in "Sleuth or Consequences" he mentions enjoying karaoke. On occasion, he enjoys Luan's jokes, and tries making his own.

Appearance
Lynn Sr. wears a sea green sweater over a light-green checkered collar and cuffs, and brown slacks. He has a long pointy nose, brown eyebrows, and curly brown hair that is thinning on the top.

In "House Music", when he is playing the cowbell, he wears a yellow-striped shirt, and green pants which his underwear was seen. In his youth, he sported a mustache.

Shorts

 * "The Loud House (pilot)"

Season 1

 * "Left in the Dark" (mentioned)
 * "Get the Message"
 * "Making the Case"
 * "Project Loud House" (mentioned)
 * "Sound of Silence"
 * "Space Invader"
 * "Undie Pressure"
 * "Linc or Swim"
 * "Changing the Baby"
 * "Hand-Me-Downer"
 * "Butterfly Effect"
 * "For Bros About to Rock"
 * "Save the Date"
 * "Out on a Limo"
 * "Cereal Offender" (mentioned)
 * "The Waiting Game"
 * "Dance, Dance Resolution"
 * "A Fair to Remember"
 * "Funny Business"
 * "Snow Bored"

Season 2

 * "Intern for the Worse"
 * "The Old and the Restless"
 * "Baby Steps"
 * "Back in Black"
 * "Patching Things Up"
 * "Cheater by the Dozen"
 * "Frog Wild" (mentioned)
 * "Kick the Bucket List"
 * "Shell Shock"
 * "Pulp Friction"

Trivia

 * Lynn Sr.'s entire face was never shown during the first season. His face was revealed along with Rita's face in the Season 2 premiere, "11 Louds a Leapin'".
 * This seems to be parodied at the beginning of "Suite and Sour", as the first few seconds of the episode keep their faces hidden, as if their reveal never happened, only to show them afterwards.
 * Luna, Luan, Lynn, and Lisa seem to resemble him the most.
 * Out of his children, he's the closest to Luna, Luan, Lynn, and Lana.
 * He is the first character in the series, apart from Lincoln, to speak to the audience. This instance occurred at the end of "It's a Loud, Loud, Loud, Loud House".
 * His personality is very similar to that of Tom Harper from Nicky, Ricky, Dicky & Dawn​, as well as Harold Buttowski from Kick Buttowski: Suburban Daredevil, who are also father characters played by Brian Stepanek.
 * It is revealed in "House Music" that he used to be in a band, but got kicked out due to playing his cowbell too much, even when they were not practicing.
 * According to "The Loudest Yard", he used to breakdance.
 * In "April Fools Rules", his eyes and nose are visible throughout the entire episode.
 * Of the two Loud parents, he has made the most appearances.
 * According to "The Price of Admission", he's afraid of horror movies.
 * Lynn Sr.'s Russian dubber, Radik Mukhametzyanov, also voices Bobby Santiago.
 * The same is in the Hebrew, Korean and Spanish dubs.
 * Lynn Sr. is the first supporting character to get an episode centered entirely around him.
 * There are episodes that reveal the Loud sisters inherited some of Lynn Sr.'s habits.
 * Leni: Fear of spiders ("Along Came a Sister")
 * Luna: Love for music ("Attention Deficit" and "House Music"), Love of Mick Swagger ("House Music"), and British accent ("Study Muffin").
 * Luan: Sense of humor ("Cover Girls", "Lincoln Loud: Girl Guru", "Raw Deal", and "Homespun")
 * Lynn: Love for sports ("Attention Deficit" and "Toads and Tiaras")
 * In "Fed Up", it is revealed that Lynn Sr.'s astrological sign is Libra, which means he was born somewhere between September 23 and October 22.