<p>Map of districts of the Massachusetts state senate apportioned in 1906. The map includes 1905 voter population information. 
</p><p>State senate districts depicted:<a rel="nofollow" class="external autonumber" href="https://archives.lib.state.ma.us/handle/2452/808466">[1]</a>
</p><p>1st Bristol district <br>
1st Essex district <br>
1st Hampden district <br>
1st Middlesex district <br>
1st Norfolk district <br>
1st Plymouth district <br>
1st Suffolk district <br>
1st Worcester district <br>
2nd Bristol district <br>
2nd Essex district <br>
2nd Hampden district <br>
2nd Middlesex district <br>
2nd Norfolk district <br>
2nd Plymouth district <br>
2nd Suffolk district <br>
2nd Worcester district <br>
3rd Bristol district <br>
3rd Essex district <br>
3rd Middlesex district <br>
3rd Suffolk district <br>
3rd Worcester district <br>
4th Essex district <br>
4th Middlesex district <br>
4th Suffolk district <br>
4th Worcester district <br>
5th Essex district <br>
5th Middlesex district <br>
5th Suffolk district <br>
6th Middlesex district <br>
6th Suffolk district <br>
7th Middlesex district <br>
7th Suffolk district <br>
8th Middlesex district <br>
8th Suffolk district <br>
9th Suffolk district <br>
Berkshire district <br>
Berkshire, Hampshire and Hampden district <br>
Cape district <br>
Franklin and Hampshire district <br></p>
Worcester and Hampden district <br><br>
Massachusetts General Court
<a rel="nofollow" class="external free" href="https://malegislature.gov/Redistricting/HistoricDistricts/Senate">https://malegislature.gov/Redistricting/HistoricDistricts/Senate</a>