Polonia refers to Poles or those of Polish decent living outside of Poland, similar to the term "Diaspora" in Jewish culture.  More specifically, it refers to Polish communities in the United States, especially in such places as Chicago and Buffalo, where Dingus Day is actually a local attraction and event.

In Buffalo, I am currently on the Board of Directors of the Buffalo-Rzeszow Sister Cities organization.  I am also in the Professional & Businessmen's Association (which came from a long history of organizations of local Polish Merchants, etc.) and I am one of the founders of WNYPolonia.Com.

Other links and resources:

Here are some flags of my own design that I am proposing be made to honor Poles in America and the unique relationship between the United States and Poland.  Both flags have the white eagle without a crown to symbolize democracy and only 13 stars to represent the active role of Poland and the Polish people since the founding of the American republic.

And here's one with 50 stars.

If anyone has any interest in making these flags individually or manufactured for commercial sale, please contact me.