List below was seeded from Graham J Murphy's non-fiction article "Utopia" in "The Routledge Companion to Science Fiction" (2009). Download links are mine.
I haven't read any of these yet. But appearance in this book suggests the stories are at least well known & influential, even if not necessarily entertaining to modern reader. Early ones appear to be a commentary on English society by contrasting it against a "better" fictional one; a couple of stories do similar things with US society; plus there are several dealing with feminist utopia. Thomas More's is supposed to be a really important book of the subgenre, in that it defined the technique for this kind of fiction.
If I do end up reading some, I'll probably add additional commentary here.
- Thomas More's "Utopia"; download; 1516.
- Francis Bacon's "New Atlantis"; download; 1627.
- Tommaso Campanella's "The City of the Sun"; download; 1602.
- Margaret Cavendish's "The Description of a New World, Called the Blazing-World"; download; 1666.
- Samuel Butler's "Erewhon, or Over the Range"; download; 1872: There seems to be a sequel too called "Erewhon Revisited" (download).
- Edward Bellamy's "Looking Backward: 2000-1887"; download; 1888.
- Charlotte Perkins Gilman's "Herland"; download; 1915.
- Charlotte Perkins Gilman's "With Her in Ourland" (1916): Dystopian sequel to "Herland".
- Ursula K Le Guin's "The Dispossessed: an ambiguous utopia" (1974).
- Joanna Russ's "The Female Man" (1975)
- Marge Piercy's "Woman on the Edge of Time" (1976)
- Samuel Delany's "Triton" (1976)
- Suzy McKee Charnas's "Motherlines" (1978)
- Sally Miller Gearhart's "Wanderground: stories of the hill women" (1980).