The Loudoun County Science and Engineering Fair is an annual science competition for high school students in Loudoun County, Virginia whose projects have been chosen by their schools to move on to the regional competition.
Winning projects will have the opportunity to move on to the Virginia State Science and Engineering Fair and/or the International Science and Engineering Fair (ISEF).
Research categories include:
- Animal Sciences
- Behavioral & Social Sciences
- Biochemistry
- Biomedical & Health Sciences
- Biomedical Engineering
- Cellular & Molecular Biology
- Chemistry
- Computational Biology & Bioinformatics
- Earth & Environmental Sciences
- Embedded Systems
- Energy: Sustainable Materials & Design
- Engineering Technology: Statics & Design
- Environmental Engineering
- Materials Science
- Mathematics
- Microbiology
- Physics & Astronomy
- Plant Sciences
- Robotics & Intelligent Machines
- Systems Software
- Technology Enhances the Arts
- Translational Medical Science
Location(s)
- Tuscarora High School, Leesburg, Virginia
Schedule
- Annually in March
Cost/Compensation
- Free
Eligibility Requirements
- High school students in grades 9-12 who attend schools in Loudoun County, Virginia and whose projects are selected by their schools to participate in the regional fair.
Deadline
- February 20, 2026
Application or Entry Requirements
- Completed online registration form
- Project Presentation - Slide presentation (12 slides max) that takes the place of a project poster.
- Video Presentation - Student narrated presentation that summarizes the project.
Notifications of Decisions
Financial Aid Details
Other Dates to Keep in Mind
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Loudoun County Public Schools is Virginia's third-largest school district, serving more than 82,000 students across nearly 100 schools. Over 13,000 employees engage in a student-centered approach that produces an overall graduation rate for all students of 97%. The division's workplace excellence has been recognized by Forbes' list of America's Best-In-State Employers.
