The Suffolk County Democratic Committee Wednesday night officially nominated Southampton Town Councilwoman Bridget Fleming to be the party’s candidate for the Suffolk County Legislature’s Second Legislative District, a seat now held by Legislator Jay Schneiderman.

Ms. Fleming, who will have been on the Town Board for five years when her current term ends, announced earlier this month that she would be seeking the nomination. She would have been eligible to serve one more four-year term on the Town Board.

“Smart fiscal policy, defense of our environmental resources, and strong ethical reform in government have been key to protecting our community, and on the county government level, I believe I can extend this important work and make a positive impact in the county post,” Ms. Fleming, who lives in Noyac, said in a statement released by the party today. “So many of our challenges, like water quality, transportation and energy issues, and an economy that meets the needs of the local community, require regional approaches and coordination among multiple towns. If elected, I will welcome the opportunity to work with colleagues county-wide to meet those challenges.”

The Republican Party has not yet formally nominated its candidate to face Ms. Fleming, though party leaders have thrown their support behind political newcomer Amos Goodman and local party leaders said no others have screened for potential nomination.

Mr. Schneiderman is prevented from seeking reelection to the seat by term limits. He is expected to announce in the coming days that he will be a candidate for Southampton Town supervisor.