Trying to remember the name of a young adult book where there is a community of just kids and no adults?

'the girl who owned a city'by OT Nelson

A killing virus has swept the earth, sparing only children through the age of twelve. There is chaos everywhere, even in formely prosperous mid-America. Gangs and fierce armies of children begin to form almost immediately. It would be the same for the children on Grand Avenue but for Lisa, a yen-year-old girl who becomes their leader. Because of Lisa, they have food, even toys, in abundance. And now they can protect themselves from the fierce gangs that roam the neighborhoods. But for how long? Then Lisa conceives the idea of a fortress, a city in which the children could live safely and happily always, and she intends to lead them there.

' lord of the flies'

or maybe ' fire-us'

a series of post-apocalyptic young adult fiction by Jennifer Armstrong and Nancy Butcher. The series begins in 2007, five years after a plague of unknown origin has killed the vast majority of the human population. The plot concerns the family, a group of genetically unrelated orphan children living in the small fictional town of Lazarus, Florida.

The older children, now approaching adolescence, attempt to emulate the behavior of the "first families" which they belonged to before the plague

The Girl Who Owned A City by OT Nelson

A killing virus has swept the earth, sparing only children through the age of twelve. There is chaos everywhere, even in formely prosperous mid-America. Gangs and fierce armies of children begin to form almost immediately. It would be the same for the children on Grand Avenue but for Lisa, a yen-year-old girl who becomes their leader. Because of Lisa, they have food, even toys, in abundance. And now they can protect themselves from the fierce gangs that roam the neighborhoods. But for how long? Then Lisa conceives the idea of a fortress, a city in which the children could live safely and happily always, and she intends to lead them there.

Lord of the Flies

Gone by Michael Grant.

Everyone over 15 disappears and some people who turn 15 also disappear but not all

probably Lord of the Flies by William Golding.

Lord of the Flies

not sure but I think so

lord of the flies

Gone by grant

are you thinking of that one?