"Public Ivy" sounds like it should have one clean answer -- it doesn't. Two different books, published 16 years apart, coined and then redefined the term, and they name meaningfully different schools. Neither is an official list, and neither the term "Ivy League" itself has ever had a governing body extending it to public schools in the first place.
Where the term actually comes from: Richard Moll, 1985
Yale admissions officer Richard Moll coined "Public Ivy" in his 1985 book of the same name, naming eight public universities he judged to offer an Ivy-caliber undergraduate experience at public-school cost: the College of William & Mary, Miami University (Ohio), and six University of California campuses -- Berkeley, Los Angeles, San Diego, Irvine, Davis, and Santa Barbara. That's Moll's actual original list -- eight schools, heavily weighted toward one state system, not the much longer list most "Public Ivy" roundups cite today.
The list most people actually mean: Greene's Guides, 2001
Sixteen years later, college guide authors Howard and Matthew Greene published their own book, The Public Ivies: America's Flagship Public Universities, expanding the concept to 30 public universities organized into five regions (Northeast, Mid-Atlantic, South, Midwest, and West) -- adding schools like Indiana University Bloomington, the University of Georgia, and the University of Washington that weren't anywhere on Moll's original eight. This is the list most current "Public Ivy" articles are actually drawing from, whether or not they credit it -- and it's a genuinely different, much broader claim than Moll's original one.
Why neither list is "the" answer
There's no trademark on "Public Ivy," no governing body, and no single list either book's author controls today -- which means any current article claiming a definitive "Public Ivy list" is picking one interpretation among several, usually without saying so. A school appearing on the Greene list but not Moll's original one isn't "less of a Public Ivy" by some objective standard -- it just means one specific 2001 guide included it and one specific 1985 book didn't. Treat both lists as two different authors' informed opinions from two different points in time, not as competing versions of one official ranking.
What this means for you
- "Public Ivy" is not a designation any school formally holds -- it's shorthand two different authors popularized, 16 years apart, for meaningfully different sets of schools.
- Know which list a source is citing before treating it as authoritative -- Moll's original 8-school list (1985) and the Greene brothers' 30-school list (2001) aren't interchangeable, and most casual usage today actually means the broader Greene list.
- A school's absence from either list says nothing about its actual quality or fit for you -- these are two authors' opinions from decades ago, not a live, maintained ranking the way Forbes' "New Ivies" list is at least rebuilt annually.
- This is the same category error as the Ivy League label itself -- see the full breakdown of what "Ivy League" actually means for why treating any of these labels as an academic-quality measurement misses what they actually are.