These are tables of congressional delegations from

Massachusetts Massachusetts (Massachusett language, Massachusett: ''Muhsachuweesut assachusett writing systems, məhswatʃəwiːsət'' English: , ), officially the Commonwealth of Massachusetts, is the most populous U.S. state, state in the New England ...

to the

United States House of Representatives The United States House of Representatives, often referred to as the House of Representatives, the U.S. House, or simply the House, is the Lower house, lower chamber of the United States Congress, with the United States Senate, Senate being ...

and the

United States Senate The United States Senate is the upper chamber of the United States Congress, with the House of Representatives being the lower chamber. Together they compose the national bicameral legislature of the United States. The composition and pow ...

. The current dean of the Massachusetts delegation is

Senator A senate is a deliberative assembly, often the upper house or chamber of a bicameral legislature. The name comes from the ancient Roman Senate (Latin: ''Senatus''), so-called as an assembly of the senior (Latin: ''senex'' meaning "the el ...

Ed Markey Edward John Markey (born July 11, 1946) is an American lawyer, politician, and former Army reservist who has served as the junior United States senator from Massachusetts since 2013. A member of the Democratic Party, he was the U.S. representa ...

, having served in Congress since 1976.

United States Senate

United States House of Representatives

1789 to 1793: 8 seats

Article I of the United States Constitution Article One of the United States Constitution establishes the legislative branch of the federal government, the United States Congress. Under Article One, Congress is a bicameral legislature consisting of the House of Representatives and the Sena ...

allocated 8 seats to Massachusetts.

1793 to 1803: 14 seats

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.

1803 to 1813: 17 seats

After the 1800 census, Massachusetts gained three seats.

1813 to 1823: 20 seats, then 13

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 Maine () is a state in the New England and Northeastern regions of the United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Canadian provinces of New Brunswick and Quebec to the northeast and north ...

1823–1833: 13 seats

Following the

1820 census The United States census of 1820 was the fourth census conducted in the United States. It was conducted on August 7, 1820. The 1820 census included six new states: Louisiana, Indiana, Mississippi, Illinois, Alabama and Maine. There has been a d ...

, Massachusetts kept its remaining 13 seats without change.

1833 to 1843: 12 seats

After the 1830 census, Massachusetts lost one seat.

1843 to 1853: 10 seats

After the 1840 census, Massachusetts lost two seats.

1853 to 1863: 11 seats

After the 1850 census, Massachusetts gained one seat.

1863 to 1873: 10 seats

After the 1860 census, Massachusetts lost one seat.

1873 to 1883: 11 seats

After the 1870 census, Massachusetts gained one seat.

1883 to 1893: 12 seats

After the 1880 census, Massachusetts gained one seat.

1893 to 1903: 13 seats

After the 1890 census, Massachusetts gained one seat.

1903 to 1913: 14 seats

After the 1900 census, Massachusetts gained one seat.

1913 to 1933: 16 seats

After the 1910 census, Massachusetts gained two seats. There was no reapportionment after the 1920 census.

1933 to 1963: 15, then 14 seats

After the 1930 census, Massachusetts lost one seat. After the 1940 census, Massachusetts lost another seat. Massachusetts kept its apportionment following the 1950 census.

1963 to 1983: 12 seats

After the 1960 census, Massachusetts lost two seats. Massachusetts kept its apportionment after the 1970 census.

1983 to 1993: 11 seats

After the 1980 census, Massachusetts lost one seat.

1993 to 2013: 10 seats

After the 1990 census, Massachusetts lost one seat. Massachusetts kept its apportionment after the 2000 census.

2013 to present: 9 seats

After the 2010 census, Massachusetts lost one seat.

Key

References

{{BaystatersList Politics of Massachusetts

Congressional delegations