Some time ago, I thought about making a map of the United States based on the most significant Supreme Court cases from each state. Specifically, I'd rename the states after the party opponent in which the state was the principal opponent in the case caption.
"Significant" turned out to be a challenge, so I opted for "most cited" according to Westlaw. That led to the results below.
It's worth noting that some of my searches were inconsistent with Westlaw's limited capabilities, and I may well be wrong on some--please correct me if so! I simply sought the most cited cases from each state.
It turns out that there are many cases I imagined were far more significant, but that didn't meet the "most cited" in a state. Those included Alabama (J.E.B., NAACP, & Miller), Arkansas (Epperson), California (Miller), Connecticut (Palko), Florida (Riley), Louisiana (Hans), Michigan (Long), Missouri (Holland), New Jersey (T.L.O.), New York (United States), Ohio (Mapp), Oregon, (Muller & Mitchell), Pennsylvania (Prigg), South Carolina (Katzenbach), South Dakota (Dole), Texas (Johnson), and Virginia (Loving, Black, & Cohen). So while a more intriguing map might have been a kind of public vote about the most significant Supreme Court case to arise out of each state, I opted for the easy way out.