The 1848 Democratic National Convention was a presidential nominating convention that met from Monday May 22 to Friday May 26 in Baltimore, Maryland. It was held to nominate the Democratic Party's candidates for President and Vice president in the 1848 election. The convention selected Senator Lewis Cass of Michigan for President and former Representative William O. Butler of Kentucky for Vice President.

The 1848 United States presidential election was the 16th quadrennial presidential election, held on Tuesday, November 7, 1848. In the aftermath of the Mexican–American War, General Zachary Taylor of the Whig Party defeated Senator Lewis Cass of the Democratic Party.