I do.
"Americans like to live in diverse communities. At least, that's what they say.
About two in three Americans say they prefer to live around people belonging to different races, religions and income groups. In reality, however, survey research shows that people are increasingly clustering together among those who are just like themselves, especially on the one attribute that ties the others together -- political affiliation.
Nearly half of all Americans live in "landslide counties" where Democrats or Republicans regularly win in a rout. In the 2008 election, 48 percent of the votes for president were cast in counties where President-elect Barack Obama or Sen. John McCain (R-Ariz.) won by more than 20 percentage points, according to the Pew Research Center.
The clustering of Democrats in Democratic areas and Republicans in Republican areas has been intensifying for at least three decades: In 1976, only about a quarter of all Americans lived in landslide counties. In 1992, a little more than a third of America was landslide country. . .
http://www.washingtonpost.com/wp-dyn/content/article/2009/01/18/AR2009011802323_pf.html
It's odd because I didn't move to me current home thinking I wanted to live in Homophily. It was other things that took me there; the ability to walk to stores, the library, the movie theater and bookshops. Why did I end up with politically similar neighbors?