Animation showing population changes for all towns and cities in Massachusetts for each decade between 1850 and 2009.
<a href="//commons.wikimedia.org/wiki/User:Emw" title="User:Emw">Emw</a>
CC BY-SA 3.0
Underlying population counts gathered from decennial US Census records.  SVG paths of municipalities derived from <a href="//commons.wikimedia.org/wiki/File:MA_cities_towns.svg" title="File:MA cities towns.svg">MA cities towns.svg</a> <i>by</i> <a href="//commons.wikimedia.org/wiki/User:Sswonk" title="User:Sswonk">Sswonk</a>.