![United States congressional delegations from Massachusetts United States congressional delegations from Massachusetts](/modules/owlapps_apps/img/nopic.jpg)
These are tables of congressional delegations from Massachusetts to the United States House of Representatives and the United States Senate.
Massachusetts is currently represented by two senators and nine representatives, all of whom are Democrats. The current dean of the Massachusetts delegation is Senator Ed Markey, having served as a Senator since 2013 and in Congress since 1976.
Article I of the United States Constitution allocated 8 seats to Massachusetts.
After the 1790 census, Massachusetts gained six seats.
In the third Congress only, there were plural districts in which more than one member would be elected from the same district and there was also an at-large seat. After that Congress, however, there would be no at-large seats and no plural seats.
After the 1800 census, Massachusetts gained three seats.
After the 1810 census, Massachusetts gained three seats to grow to its largest apportionment (so far). In 1820/21, however, seven of those seats were lost to the new state of Maine.
Following the 1820 census, Massachusetts kept its remaining 13 seats without change.
After the 1830 census, Massachusetts lost one seat.
After the 1840 census, Massachusetts lost two seats.
After the 1850 census, Massachusetts gained one seat.
After the 1860 census, Massachusetts lost one seat.
After the 1870 census, Massachusetts gained one seat.
After the 1880 census, Massachusetts gained one seat.
After the 1890 census, Massachusetts gained one seat.
After the 1900 census, Massachusetts gained one seat.
After the 1910 census, Massachusetts gained two seats. There was no reapportionment after the 1920 census.
After the 1930 census, Massachusetts lost one seat. After the 1940 census, Massachusetts lost another seat. Massachusetts kept its apportionment following the 1950 census.
After the 1960 census, Massachusetts lost two seats. Massachusetts kept its apportionment after the 1970 census.
After the 1980 census, Massachusetts lost one seat.
After the 1990 census, Massachusetts lost one seat. Massachusetts kept its apportionment after the 2000 census.
After the 2010 census, Massachusetts lost one seat. Massachusetts kept its apportionment after the 2020 census.
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