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Connecticut state legislative special elections, 2025

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In 2025, as of September, three special elections have been called to fill vacant seats in the Connecticut State Legislature. Click here to read more about the special elections.

Senate special elections called:

House special elections called:

How vacancies are filled in Connecticut

See also: How vacancies are filled in state legislatures


If there is a vacancy in the Connecticut General Assembly, a special election must be conducted to fill the vacant seat. The governor must call for an election no later than 10 days after the vacancy happens. All special elections must be held no later than 46 days after a governor's declaration. If the vacancy occurs between the 125th day and the 49th day before the day of the regular election, the special election will be held on the same day as the general election. If a vacancy occurs after the 49th day before the general election but before the Wednesday following the first Monday of January of the next-succeeding year, the governor shall not call a special election unless the vacant position is that of a member-elect.[1]

DocumentIcon.jpg See sources: Connecticut Gen. Stat. § 9-215


About the legislature

The Connecticut General Assembly is a bicameral body composed of the 151-member lower Connecticut House of Representatives and the 36-member upper Connecticut State Senate.

The boxes below show the partisan composition of both chambers directly before and after the most recent general elections prior to 2025. For the most up-to-date numbers on partisan composition in this legislature, see here (Senate) and here (House).

Connecticut State Senate
Party As of November 5, 2024 After November 6, 2024
     Democratic Party 24 25
     Republican Party 12 10
     Vacancy 0 1
Total 36 36


Connecticut House of Representatives
Party As of November 5, 2024 After November 6, 2024
     Democratic Party 98 101
     Republican Party 53 49
     Vacancy 0 1
Total 151 151

Special elections

Click [show] to the right of the district name for more information:

February 25

April 22

Historical data

There were 1,007 state legislative special elections that took place from 2010 to 2024. Connecticut held 52 special elections during the same time period. The largest number of special elections in Connecticut took place in 2011 when 10 special elections were held.

The table below details how many state legislative special elections were held in a state in a given year.

Special elections throughout the country

See also: State legislative special elections, 2025

As of September 2025, 87 state legislative special elections have been scheduled for 2025 in 22 states. One special election has also been called to fill a vacancy in the Puerto Rico House of Representatives. Between 2011 and 2024, an average of 70 special elections took place each year.

Breakdown of 2025 special elections

In 2025, special elections for state legislative positions are being held for the following reasons:

  • 37 due to appointment, election, or the seeking of election to another position
  • 23 due to resignation
  • 14 due to redistricting
  • 13 due to the death of the incumbent
  • 1 due to the officeholder leaving at term end


Impact of special elections on partisan composition

The partisan breakdown for the special elections is as follows:

As of September 18th, 2025, Republicans controlled 55.51% of all state legislative seats nationally, while Democrats held 43.68%. Republicans held a majority in 57 chambers, and Democrats held the majority in 39 chambers. Two chambers (Alaska House and Alaska Senate) were organized under multipartisan, power-sharing coalitions. One chamber (Minnesota House of Representatives) was split evenly between both parties.

Partisan balance of all 7,386 state legislative seats
Legislative chamber Democratic Party Republican Party Grey.png Other Vacant
State senates 834 1,122 5 12
State houses 2,392 2,978 20 23
Total: 3,226

4,100

25

35


The table below details how many seats changed parties as the result of a special election in 2025. The number on the left reflects how many vacant seats were originally held by each party, while the number on the right shows how many vacant seats each party won in the special elections.

Note: This table reflects information for elections that have been held and not the total number of vacant seats.

Partisan Change from Special Elections (2025)
Party As of Special Election After Special Election
     Democratic Party 47 26
     Republican Party 40 19
     Independent 0 1
Total 87 46

Flipped seats

In 2025, as of August 26, four seats have changed party hands as a result of state legislative special elections.


Seats that changed from D to I

Seats that changed from R to D


See also

Footnotes

  1. ↑ Connecticut General Assembly, "Connecticut General Statutes," accessed February 10, 2021 (Statute 9-215(a), Connecticut General Statutes)
  2. ↑ Connecticut Secretary of State's Office, "Secretary of the State’s Office Receives the Resignation of Senator Kevin C. Kelly," January 7, 2025
  3. ↑ CT News Junkie, "Perillo Seeking Open Senate Seat; Special Election Set For Feb. 25 ," January 15, 2025
  4. ↑ Connecticut Secretary of State's Office, "Secretary of the State's Office Receives the Resignation of State Representative Christine Conley," January 7, 2025
  5. ↑ CT News Junkie, "Perillo Seeking Open Senate Seat; Special Election Set For Feb. 25 ," January 15, 2025
  6. ↑ Connecticut Secretary of State's Office, "SGovernor Lamont Orders Special Election on April 22 for State Representative Seat in Shelton," March 7, 2025
  7. ↑ CT Mirror, "Special elections: Jason Perillo wins in Senate, Dan Gaiewski in House," Februaury 25, 2025
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