David William Marsden (born April 5, 1948) is an American politician of the Democratic Party. In 2010 he was elected to represent the 37th district, a portion of Fairfax County, in the Senate of Virginia, and later re-elected to the senate.

Marsden graduated from Wilbert Tucker Woodson High School in 1966 and Randolph–Macon College in 1970.

Prior to his career in politics, Marsden spent 17 years as head of the Fairfax County Juvenile Detention Center until 1999. In 2000, Governor Jim Gilmore appointed him Chief Deputy and then Acting Director of the 2,700-person Virginia Department of Juvenile Justice. He then served for 6 months in the administration of Governor Mark Warner. Between 2006 and 2010, he served in the Virginia House of Delegates representing the 41st district.

On January 12, 2010, Marsden defeated Steve Hunt in a special Senate election to replace Republican Ken Cuccinelli who was elected Attorney General the previous fall. On January 13, 2010, Marsden was sworn in. An additional special election was held March 2, 2010 to replace Marsden in the Virginia House of Delegates. It was won by Democrat Eileen Filler-Corn.

• Transportation (Chair)
• Agriculture, Conservation and Natural Resources
• Commerce and Labor
• Finance and Appropriations
• Rules

• "Virginia House of Delegates; David W. Marsden". Archived from the original on 2008-03-28. Retrieved 2008-11-14.
• "Senate of Virginia; David W. Marsden". Retrieved 8 December 2016.
• Dave Marsden for Delegate (Constituent/campaign website)
• Dave Marsden for State Senate (Constituent/campaign website)

• "Virginia Public Access Project; David W. Marsden". Retrieved 2008-11-14.
• "Virginia State Board of Elections; Election Information; Election Results". Archived from the original on 2010-06-17. Retrieved 2008-11-14.
• Project Vote Smart - Representative Dave W. 'Dave' Marsden (VA) profile
• Follow the Money - Dave W. Marsden
  • 2005 campaign contributions
• Washington Post - Dave W. Marsden local election 2008 profile