2003 TRIO ThinkQuest Semifinalists
| State | Institution & Program | Site Title |
| CA | Cal. State University, Chico Upward Bound |
Drunk Driving |
| CA | Cal. State University, Chico Upward Bound |
The Underlying Causes of World War II |
| CA | Cal. Lutheran University UB Math/Science |
Dreams |
| CA | Cal. Lutheran University UB Math/Science |
Human Cloning |
| CA | Cal. Lutheran University UB Math/Science |
Universe Planetarium |
| CA | Modesto Junior College Talent Search |
Cinco de Mayo |
| CA | Modesto Junior College Talent Search |
El Dia de los Muertos |
| CA | Modesto Junior College Talent Search |
The Holocaust |
| CA | Modesto Junior College Talent Search |
Quinceañeras |
| FL | Florida A&M University UB Math/Science |
Hurricanes |
| FL | Florida A&M University UB Math/Science |
Medical Malpractice |
| GA | Georgia State University Talent Search |
Mind Over Media |
| HI | Windward Community College Upward Bound | Wipe Out! |
| KY | Berea College Upward Bound |
Ancient Greece |
| KY | Berea College Upward Bound |
Face Facts |
| KY | Berea College Upward Bound |
The Fallen Stars |
| KY | Berea College Upward Bound |
A World at War: WW2 Military Strategies |
| LA | Southeastern Louisiana University UB Math/Science | Spinal Muscular Atrophy |
| OR | Portland State University Upward Bound | Eating Disorders and Propaganda |
| OR | Portland State University Upward Bound | System Dynamics and Our World |
| PA | Lincoln University Upward Bound |
Minority Health Issues |
| PA | Lincoln University Upward Bound |
S.M.A.R.T.S. |
| SC | Florence Darlington Technical College Upward Bound |
Breaking the Chain |
| WA | Big Bend Community College Upward Bound | Counting music...One day at a time |
| WA | Big Bend Community College Upward Bound | Hybrids: The Beginning of the Automotive Future |
| WA | University of Washington Upward Bound |
The Khmer Rouge |
| WA | University of Washington Upward Bound |
Phobias: What are you afraid of? |
| WA | University of Washington Upward Bound |
Powwows |
| WA | University of Washington Upward Bound |
Teens and Alcoholism |
| WA | University of Washington Upward Bound |
The War with AIDS: Africa's Crisis |