The 2008 National League Championship Series (NLCS), the second round of the 2008 National League playoffs, was a best-of-seven baseball game series. The series matched the NL West Champion Los Angeles Dodgers against the NL East Champion Philadelphia Phillies, who had home field advantage for this series due to their better regular-season record. The teams split their season series, with the home team sweeping their two four-game series in August.

The National League Championship Series (NLCS), also known as the National League Pennant, is a best-of-seven playoff and one of two League Championship Series comprising the penultimate round of Major League Baseball's (MLB) postseason. It is contested by the winners of the two National League (NL) Division Series. The winner of the NLCS wins the NL pennant and advances to the World Series, MLB's championship series, to play the winner of the American League's (AL) Championship Series. The NLCS began in 1969 as a best-of-five playoff and used this format until 1985, when it changed to a best-of-seven format.