District 30 of the Virginia Senate is a senatorial district that currently encompasses portions of the City of Alexandria, Arlington County and Fairfax County in the U.S. state of Virginia. The current Senator from District 30 is Adam Ebbin. As discussed below, the district's boundaries have varied greatly as Virginia has redistricted as a result of population changes documented in the decennial census, as well as court challenges to problematic reapportionments by the Virginia General Assembly.
From 1940 to 1952, the 30th Senate District included the Northern Neck counties of King George, Westmoreland, Northumberland, Lancaster and Richmond.
In 1962, the 30th Senate District included the counties of Caroline, Hanover, King William, Essex, King and Queen, and Middlesex in Central Virginia and the Middle Peninsula. As a result of the U.S. Supreme Court's ruling in the One person, one vote case of Davis v. Mann (which challenged under-representation in northern Virginia), the General Assembly redistricted itself such that in 1964-67 the 30th District included York County and the City of Newport News. In 1967, after implementation of the Civil Rights Act of 1964, the legislature redistricted again and the 30th District included all of the City of Richmond. Beginning in 1972, as a result of a regular decennial redistricting, the 30th Senate District included all of the City of Alexandria.