Massachusetts 66th State House District, Massachusetts: Democratic loyalist district. In 2024, voted D+38%. Democratic peak: D+52 in 1964.
Key facts
- 2024 presidential margin
- D+38MIT Election Lab
- Political archetype
- Democratic loyalistAkashic typology
- Population
- 137,6462024 5-year
- Median household income
- $130,8352024 5-year
- White (non-Hispanic)
- 67.1%2024 5-year
- Black
- 5.2%2024 5-year
- Hispanic / Latino
- 8.9%2024 5-year
- Peak Democratic margin
- D+52 in 1964MIT Election Lab
- Peak Republican margin
- R+47 in 1896MIT Election Lab
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 46,489 | 20,350 | 68,960 | ||
| D | 51,816 | 19,588 | 73,547 | ||
| D | 43,501 | 18,935 | 68,242 | ||
| D | 39,476 | 23,089 | 63,801 | ||
| D | 38,887 | 21,236 | 61,457 | ||
| D | 37,102 | 20,449 | 58,402 | ||
| D | 34,126 | 17,108 | 55,726 | ||
| D | 33,520 | 14,648 | 53,203 | ||
| D | 28,840 | 16,639 | 58,291 | ||
| D | 30,359 | 24,844 | 56,096 | ||
| R | 27,167 | 27,237 | 54,576 | ||
| D | 22,674 | 22,058 | 53,995 | ||
| D | 30,130 | 22,294 | 54,396 | ||
| D | 28,946 | 22,919 | 52,139 | ||
| D | 31,014 | 16,077 | 48,716 | ||
| D | 36,744 | 11,504 | 48,438 | ||
| D | 29,420 | 20,938 | 50,462 | ||
| R | 17,775 | 28,824 | 46,729 | ||
| R | 19,231 | 26,545 | 45,910 | ||
| D | 20,031 | 19,146 | 39,966 | ||
| R | 17,145 | 19,670 | 36,877 | ||
| R | 17,729 | 20,158 | 38,063 | ||
| R | 15,347 | 16,639 | 34,426 | ||
| R | 14,026 | 15,349 | 29,956 | ||
| R | 13,913 | 15,662 | 29,683 | ||
| R | 5,126 | 13,343 | 20,749 | ||
| R | 4,927 | 12,772 | 18,169 | ||
| R | 3,983 | 4,940 | 9,122 | ||
| D | 2,929 | 2,478 | 8,289 | ||
| R | 2,499 | 4,759 | 7,741 | ||
| R | 2,628 | 4,492 | 7,395 | ||
| R | 2,364 | 4,020 | 6,622 | ||
| R | 1,565 | 4,627 | 6,468 | ||
| R | 2,810 | 3,260 | 6,227 | ||
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Demographics
The 8th Middlesex delivered a 36.5-point Democratic presidential margin in 2024, reflecting the dense, highly educated suburban electorate characteristic of inner Middlesex County's legislative districts.
The Democratic margin in Massachusetts 66th State House District reached its widest at fifty-two points in 1964. The margin in 2024 was thirty-eight points — still decisive.
Its loyalty is rooted in its place. Median household income of $130,835, a 67% non-Hispanic-white share, and a population of 137,646 together describe a district whose political habits are deeply settled.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
8th Middlesex District, Massachusetts. Akashic. https://akashic.app/sld-lower/25066/. Accessed May 20, 2026. License: CC BY 4.0.