From the Mon. Dec. 10, 2012 issue of the Bangor Daily News pg. C6. “Migration west affected Maine’s population” by Wayne Reilly…
The 1840 Census showed that Maine was growing more slowly than the rest of the nation. This continued into the 20th century. People were moving to the Midwest, and then to the West Coast. Old Bangor newspapers printed letters and stories about folks who had left. Where Mainers went they kept ties by forming organizations such as the Pine Tree State Assoc. of Los Angeles. There was a book titled “Maine Men and Women in Southern Calif.” The 1912 edition of Who’s Who in America listed 523 Maine people most of whom lived out of state.
There are still Maine associations in Fla. and the D.C. area, so probably more exist.