McBurgertown is a chain of fast food restaurants with its headquarters apparently near Quahog, Rhode Island.
Peter Griffin saves local restaurant owner Todd Meyers when the restaurant catches fire in "McStroke", however he loses his mustache. Peter was rewarded by being given free hamburgers whenever he wanted them. Peter had a stroke after he ate thirty hamburgers in one sitting. Peter tried to sue the company but lost. Determined to prove the company is evil, he sneaks his way into the corporate headquarters by posing as a foreign investor. He discovers the McBurgertown slaughterhouse and frees Mr. Cow who exposes the company for its practices.
Stewie goes to work for McBurgertown in "Baby Not On Board".
A pregnant Stewie's water breaks at McBurgertown in "Stewie Is Enceinte".
Peter stops for breakfast in "Follow the Money", ordering huevos rancheros and orange soda without a cap.
Stewie and his new friend Hudson get Star Wars toys of Kylo Ren and Forrest Whitaker from McBurgertown in "Pal Stewie" and proceed to choke on them intentionally. In the same episode, Peter is instructed by Tony Robbins to demand more bacon on his burger when he is shorted.
Peter interrupts his exercise workout with Quagmire and the guys to grab food from McBurgertown in "Family Guy Lite".