In the same way that a news story about a terrible disaster can be "popular" - gaining millions of reads, being talked about by people across the globe - so too can the worst of people: the Serial Killer.
Public voting site Ranker employs the Reddit-style method of up- or down-voting entries, giving an interesting insight into the public impression of notoriety. According to this source, the most "popular" - ie. well known and infamous - serial killers in America are...
5. H.H. Holmes
A.K.A.: America's First Serial Killer
On Screen: H.H. Holmes: America's First Serial Killer (2004)
Last Words: "I only wish to say that the extent of my wrong-doing in taking human life consisted in the death of two women. They having died at my hands as the result of criminal operations."
A.K.A.: The Killer Clown
On Screen: Gacy (2003)
Last Words: "Kiss my ass."
On Screen: Zodiac (2007)
Last Words: N/A - Zodiac has never been caught.
A.K.A.: The Milwaukee Cannibal
On Screen: Dahmer (2002)
Last Words: "I don't care if I live or die. Go ahead and kill me."
1. Ted Bundy
A.K.A.: The Lady Killer
On Screen: Bundy (2002)
Last Words: "I'd like you to give my love to my family and friends."
Who do you think is the most famous serial killer in America?