Delaware's 1st Senate district is one of 21 districts in the Delaware Senate. It has been represented by Democrat Sarah McBride since 2020, succeeding fellow Democrat Harris McDowell III; McBride is the first openly transgender state senator in American history.[3]
District 1 covers the northeastern tip of New Castle County along the Delaware River, including Claymont, Bellefonte, most of Edgemoor, and parts of northern Wilmington.[4][5]
Like all districts in the state, the 1st Senate district is located entirely within Delaware's at-large congressional district. It overlaps with the 1st, 3rd, 4th, 6th, 7th, and 10th districts of the Delaware House of Representatives.[6] The district borders New Jersey via the Delaware River and Pennsylvania via the Twelve-Mile Circle.[1]
Delaware Senators are elected to staggered four-year terms. Under normal circumstances, the 1st district holds elections in presidential years, except immediately after redistricting, when all seats are up for election regardless of the usual cycle.