Massachusetts
- At-large seat: 1793-1795 (obsolete)
- 1st district: 1789–present
- 2nd district: 1789–present
- 3rd district: 1789–present
- 4th district: 1789–present
- 5th district: 1789–1793, 1795–present
- 6th district: 1789–1793, 1795–present
- 7th district: 1789–1793, 1795–present
- 8th district: 1789–1793, 1795–present
- 9th district: 1795–present
- 10th district: 1795–2013 (obsolete since the 2010 census)
- 11th district: 1795–1843, 1853-1863, 1873-1993 (obsolete since the 1990 census)
- 12th district: 1795–1843, 1883-1983 (obsolete since the 1980 census)
- 13th district: 1795–1833, 1893-1963 (obsolete since the 1960 census)
- 14th district: 1795–1820 (moved to Maine), 1903–1963 (obsolete since the 1960 census)
- 15th district: 1803–1820 (moved to Maine), 1913–1943 (obsolete since the 1940 census)
- 16th district: 1803–1820 (moved to Maine), 1913–1933 (obsolete since the 1930 census)
- 17th district: 1803–1820 (obsolete since 1820 move to Maine)
- 18th district: 1813–1820 (obsolete since 1820 move to Maine)
- 19th district: 1813–1820 (obsolete since 1820 move to Maine)
- 20th district: 1813–1820 (obsolete since 1820 move to Maine)
Read more about this topic: United States Congressional Districts