First Divorce In America?

Rhode Island  -  May 19, 1657

The "unlawful" marriage between Richard Ussell and Abigail Davis was dissolved.  Abigail then married Edward Richmond, son of John Richmond, the original American immigrant.

From: An American ancestry

Close, but no cigar.  There was a divorce in Massachusetts colony in 1639 and on January 5, 1643.