2008 U.S. Men's Clay Court Championships
Date	April 14–20
Edition	40th
Category	International Series
Draw	32S / 16D
Prize money	$411,000
Surface	Clay / outdoor
Location	Houston, Texas, United States
Venue	River Oaks Country Club
Champions
Singles
Marcel Granollers Pujol[1]
Doubles
Ernests Gulbis / Rainer Schüttler[2]
← 2007 · U.S. Men's Clay Court Championships · 2009 →

The 2008 U.S. Men's Clay Court Championships was a men's tennis tournament played on outdoor clay courts. It was the 40th edition of the U.S. Men's Clay Court Championships, and was part of the International Series of the 2008 ATP Tour. It took place at River Oaks Country Club in Houston, Texas, United States, from April 14 through April 20, 2008. Seventh-seeded Marcel Granollers Pujol won the singles title.

The singles draw featured ATP No. 8, 2007 Davis Cup champion and Delray Beach finalist James Blake, Indian Wells quarterfinalist Tommy Haas, and Miami Masters runner-up Mardy Fish. Among other top players competing were Las Vegas winner Sam Querrey, Acapulco quarterfinalist Agustín Calleri, Dudi Sela, Marcel Granollers Pujol and Óscar Hernández.

Marcel Granollers Pujol defeated James Blake, 6–4, 1–6, 7–5

• It was Marcel Granollers Pujol's 1st career title.

Ernests Gulbis / Rainer Schüttler defeated Pablo Cuevas / Marcel Granollers Pujol, 7–5, 7–6^(7–3)

• Official website
• Singles draw
• Doubles draw