The 2003 NCAA Division I Cross Country Championships were the 65th annual NCAA Men's Division I Cross Country Championship and the 23rd annual NCAA Women's Division I Cross Country Championship to determine the team and individual national champions of NCAA Division I men's and women's collegiate cross country running in the United States.

In all, four different titles were contested: men's and women's individual and team championships.

The men's team championship was again won by Stanford (24 points), the Cardinal's second consecutive and fourth overall.

This was the third time that the same university won both team titles; Stanford accomplished this feat in 1996 and Wisconsin captured both in 1985.

The two individual champions were, for the men, Dathan Ritzenhein (Colorado, 29:14.1) and, for the women, Shalane Flanagan (North Carolina, 19:30.4).