Dystopian: 

Fahrenheit 451 by Ray Bradbury 

Handmaid's Tale, The Testaments, The Blind Assassin by Margaret Atwood  

Do Androids Dream of Electric Sheep by Phillip K. Dick 

1984 by George Orwell

Never Let Me Go by Kazuo Ishiguro

Brave New World by Aldous Huxley

Blindness by José Saramago

The Children of Men by P.D. James

The Drowned World by J.G. Ballard

We by Yevgeny Zamyatin

Station Eleven by Emily St. John Mandel

The Chrysalids by John Wyndham

The Iron Heel by Jack London

The Wall by John Lanchester

When She Woke by Hillary Jordan

Unwind by Neal Shusterman 

The Road by Cormac McCarthy

Contemporary/ Young Adult Dystopian Texts:

The Hunger Games by Suzanne Collins (and sequels)

Divergent by Veronica Roth (and sequels)

Uglies by Scott Westerfield (and sequels)

Imagine Me by Tahereh Mafi

The Grace Year by Kim Liggett

Dry by Neal and Jarrod Shusterman

Ready Player One by Ernest Cline (and sequel)

The Fifth Wave by Rick Yancey 

Legend by Marie Lu (and sequels)

The Knife of Never Letting Go by Patrick Ness

Delirium by Lauren Oliver

Red Queen by Victoria Aveyard

The Maze Runner by James Dashner

The Sandcastle Empire by Kayle Olson

Want by Cindy Pon

Ender’s Game by Orson Scott Card (the sequels)

Snow Crash by Neal Stephenson