2 candidates are tracked for Connecticut Senate District 20 on the November 3, 2026 ballot: Martha E. Marx and Ronald J. LaBonte. Candidate information follows official Lower Connecticut River Valley Planning Region election filings; verify with the official election office linked below.
Martha E. Marx (Democratic), Ronald J. LaBonte (Republican) are the major-party nominees for Connecticut Senate District 20 on the November 3, 2026 ballot. Listed from the party endorsement and nomination certificates filed with the Secretary of the State and the August 11 primary results; minor-party lines and petitioning candidates are certified separately and are not yet reflected here. Martha E. Marx is the sitting member, per the General Assembly's member list. Connecticut nominates by party convention; an August 11, 2026 primary was held only where a challenger qualified, per the Secretary of the State.
State legislator. State legislators write and vote on state laws and the state budget, which fund schools, roads, prisons, universities and health programs, and set the rules for local governments and elections. Each member represents one district and serves on committees that shape bills before a floor vote. Terms are two years in most state houses and four in most state senates.
This race. Elected by district: only voters who live in the district see this race on their ballot. The sitting officeholder, Martha E. Marx, is on the ballot.
Connecticut › Lower Connecticut River Valley Planning Region › Connecticut Senate District 20
Democratic Incumbent
Martha E. Marx serves as Deputy Majority Leader of the Connecticut Senate, representing Bozrah, East Lyme, Montville, New London, Old Lyme, Old Saybrook, Salem and Waterford, per senatedems.ct.gov. No campaign website was found as of September 20, 2026.
Republican
Ronald J. LaBonte is the Republican nominee for Connecticut Senate District 20 on the November 3, 2026 ballot, per the Connecticut Secretary of the State's 2026 Certificate of Party Endorsement or Nomination for this district. No campaign website was found as of September 20, 2026.
Who is running for Connecticut Senate District 20 in 2026?
2 candidates are tracked for Connecticut Senate District 20 on the November 3, 2026 ballot: Martha E. Marx and Ronald J. LaBonte. Candidate information follows official Lower Connecticut River Valley Planning Region election filings; verify with the official election office linked below.
When is the Connecticut Senate District 20 election in Connecticut?
Election Day is Tuesday, November 3, 2026. Registration deadlines, early voting dates and mail ballot rules for Connecticut are on the Connecticut election hub at theballotbrief.com.
How do I see my exact Lower Connecticut River Valley Planning Region ballot?
Enter your ZIP code in the lookup at theballotbrief.com for the statewide and congressional races, or a full street address to add the county, city and district contests for that location.
Candidate roster from official Lower Connecticut River Valley Planning Region and state election office filings. Bios and priorities carry their attribution inline.
Cross-check with the official Connecticut election office, or see the full Lower Connecticut River Valley Planning Region sample ballot and your exact ballot by address.
16 tracked races in Lower Connecticut River Valley Planning Region, Connecticut. Landed here from another county's search? Look up your own ballot below.