This information was retrieved directly from The Selection Wiki
Here are the 8 Castes:
One Royalty and religious figures. Maxon Schreave and his family (King Clarkson, Queen Amberly, and Adele) are Ones. After marrying him, America Singer and all her family members also became Ones. A position of power and respect and the very top of the caste system.
Two Celebrities; including athletes, singers, actors/actresses, models, politicians, police officers, firefighters, guards, and military members. Celeste is a Two and is a model. Aspen, formerly a Six, is also a Two and is a guard at the palace. After marrying him, Lucy also became a Two. Officer Avery and Officer Markson are palace guards, so they are in the Second caste too. Carter Woodwork, a previous Seven, became a palace guard and thus was upgraded to a Two. When Carter was caught with one of The Elite, Marlee Tames, they were both canned and became the lowest caste. She married him and, with Maxon's help, they were both secretly upgraded to Sixes as palace servants. Both of them however eventually became attendants of King Maxon Schreave and Queen America Schreave and they were restored to the Second caste.
Three Great Minds; including inventors, teachers, philosophers, scientists, doctors, veterinarians, dentists, architects, librarians, engineers, therapists/psychologists, film directors, music producers, lawyers, and writers. Girls that are or were part of the Selection are also part of this caste, unless they are a natural Two or already a Three. Kriss was already a Three. However, America became a Three when she entered the Selection.
Four Businessmen; including jewelers, real estate agents, insurance brokers, head chefs, construction managers, property/business owners, and farmers. America's older sister and her husband are factory workers. Natalie, Anna and Emmica are from a family of farmers—all of them were Fours before the Selection. Elise was a Four before being selected, although her parents are actually very rich owners of luxurious hotels. Marlee and Queen Amberly were also Fours before their respective Selections.
Five Artists and Performers; including stage actors, classical musicians, singers, dancers, photographers and circus performers. In The One, Maxon confesses that he would be a photographer and therefore be a Five with America, if he wasn't a prince. America's family (Shalom, Magda, Kota, May, and Gerad) were Fives. America's older sister, Kenna, was formerly a Five before marrying James, a Four, and becoming one herself. America was also formerly a Five before entering the Selection and becoming a Three.
Six Workers; including secretaries, waiters/waitresses, housekeepers, seamstresses, store clerks, cooks, and drivers. Anne, Lucy, Mary, Mitsy, Paige and possibly Silvia and Sylvan Santos are Sixes. The servants at the palace are Sixes. Aspen was a Six too, until he started working in the palace as a guard.
Seven Manual Laborers; including gardeners, construction workers, farm hands, gutter/pool cleaners, and "trash collectors, ditch diggers, movers." When signing up for the Selection, America notes "a girl, obviously a Seven, still in her work clothes. Her muddy boots might not make the picture, but the dust on her overalls probably would. A few yards back, another Seven was sporting a tool belt." Sevens are very similar to Sixes, but they have outdoor jobs instead.
Eight "Untouchables"; including mentally/physically unwell people, addicts, runaways, illegitimates, and the homeless. In a deleted scene from chapter eight of The Selection, it was written that Eights are "people who had been abandoned or orphaned with no way to prove their caste. And then people who fell into heavy drug use, the mentally and physically handicapped, they were all unemployable and left in the streets to beg." Traitors to the crown are also in this caste.
Here are the 8 Castes:
One
Royalty and religious figures. Maxon Schreave and his family (King Clarkson, Queen Amberly, and Adele) are Ones. After marrying him, America Singer and all her family members also became Ones. A position of power and respect and the very top of the caste system.
Two
Celebrities; including athletes, singers, actors/actresses, models, politicians, police officers, firefighters, guards, and military members. Celeste is a Two and is a model. Aspen, formerly a Six, is also a Two and is a guard at the palace. After marrying him, Lucy also became a Two. Officer Avery and Officer Markson are palace guards, so they are in the Second caste too. Carter Woodwork, a previous Seven, became a palace guard and thus was upgraded to a Two. When Carter was caught with one of The Elite, Marlee Tames, they were both canned and became the lowest caste. She married him and, with Maxon's help, they were both secretly upgraded to Sixes as palace servants. Both of them however eventually became attendants of King Maxon Schreave and Queen America Schreave and they were restored to the Second caste.
Three
Great Minds; including inventors, teachers, philosophers, scientists, doctors, veterinarians, dentists, architects, librarians, engineers, therapists/psychologists, film directors, music producers, lawyers, and writers. Girls that are or were part of the Selection are also part of this caste, unless they are a natural Two or already a Three. Kriss was already a Three. However, America became a Three when she entered the Selection.
Four
Businessmen; including jewelers, real estate agents, insurance brokers, head chefs, construction managers, property/business owners, and farmers. America's older sister and her husband are factory workers. Natalie, Anna and Emmica are from a family of farmers—all of them were Fours before the Selection. Elise was a Four before being selected, although her parents are actually very rich owners of luxurious hotels. Marlee and Queen Amberly were also Fours before their respective Selections.
Five
Artists and Performers; including stage actors, classical musicians, singers, dancers, photographers and circus performers. In The One, Maxon confesses that he would be a photographer and therefore be a Five with America, if he wasn't a prince. America's family (Shalom, Magda, Kota, May, and Gerad) were Fives. America's older sister, Kenna, was formerly a Five before marrying James, a Four, and becoming one herself. America was also formerly a Five before entering the Selection and becoming a Three.
Six
Workers; including secretaries, waiters/waitresses, housekeepers, seamstresses, store clerks, cooks, and drivers. Anne, Lucy, Mary, Mitsy, Paige and possibly Silvia and Sylvan Santos are Sixes. The servants at the palace are Sixes. Aspen was a Six too, until he started working in the palace as a guard.
Seven
Manual Laborers; including gardeners, construction workers, farm hands, gutter/pool cleaners, and "trash collectors, ditch diggers, movers." When signing up for the Selection, America notes "a girl, obviously a Seven, still in her work clothes. Her muddy boots might not make the picture, but the dust on her overalls probably would. A few yards back, another Seven was sporting a tool belt." Sevens are very similar to Sixes, but they have outdoor jobs instead.
Eight
"Untouchables"; including mentally/physically unwell people, addicts, runaways, illegitimates, and the homeless. In a deleted scene from chapter eight of The Selection, it was written that Eights are "people who had been abandoned or orphaned with no way to prove their caste. And then people who fell into heavy drug use, the mentally and physically handicapped, they were all unemployable and left in the streets to beg." Traitors to the crown are also in this caste.