2005 TRIO ThinkQuest Quarterfinalists
| State | Institution & Program | Site Title |
| CA | CSU Chico Upward Bound |
Obesity in the Hmong & Latino Cultures |
| CA | CSU Monterey Bay Upward Bound |
Child Labor |
| CA | CSU Monterey Bay Upward Bound |
Mexican Immigrants vs. Education |
| IL | Carl Sandburg College Upward Bound |
China's Culture |
| KY | Berea College Upward Bound |
A Mother's Nightmare |
| KY | Berea College Upward Bound |
Iraq! The Right Decision |
| KY | Berea College Upward Bound |
Witch Hunt |
| KY | Berea College Upward Bound |
Wood Working |
| LA | University of New Orleans Upward Bound |
National Women's Football Association |
| NM | New Mexico State University, Upward Bound | Don't Judge a Book by its Cover |
| NY | Harlem Center for Education, Talent Search | Latin Music and American Music |
| OR | Portland State University Upward Bound |
Internet Precaution for Teenagers |
| OR | Portland State University Upward Bound |
On the Streets |
| OR | Portland State University Upward Bound |
The Most Illustrious Egyptian Pyramids |
| OR | Portland State University Upward Bound |
Tsunami |
| PA | Lincoln University Upward Bound |
Miracles within the Cell |
| PA | Lincoln University Upward Bound |
Subliminal Messages |
| SC | Florence Darlington Upward Bound |
Path to Success |
| SD | University of South Dakota, UBMS | Birds/Database |
| SD | University of South Dakota, UBMS | Database/Birds |
| SD | University of South Dakota, UBMS | Diabetes |
| SD | University of South Dakota, UBMS | Nutrition |
| SD | University of South Dakota, UBMS | Prairie Botany |
| TN | Hiwassee College Upward Bound |
Cave Paintings |
| TN | Hiwassee College Upward Bound |
Mummified Egyptian Royalty |
| TN | Hiwassee College Upward Bound |
Pirates |
| TN | Hiwassee College Upward Bound |
Tellico Archeology |
| TN | Hiwassee College Upward Bound |
Terra Cotta Warriors |
| TX | U. of Texas at El Paso Talent Search |
Chamizal National Memorial |
| TX | U. of Texas at El Paso Talent Search |
Artificial Intelligence |
| TX | U. of Texas at El Paso Talent Search |
Cartoons! |
| TX | U. of Texas at El Paso Talent Search |
The Legacy of the Dance |
| TX | U. of Texas at Arlington UBMS |
The World of Cartoons |
| WA | Big Bend Community College, Upward Bound | The Truth about Meth |
| WI | University of Wisconsin-Green Bay, UBMS | The Science of a Basketball Shot |