Science Fairs in Pennsylvania: How to Find Yours and Win

Dreaming of showcasing your research at a science fair in Pennsylvania? This guide walks you through the state's science fair landscape and how to build a project that wins and advances toward the Regeneron International Science and Engineering Fair (ISEF).

One thing to understand first: Pennsylvania has two distinct science research pathways, and many students take part in both.

The first is the network of ISEF-affiliated regional science fairs, like the Capital Area, Delaware Valley, and Pittsburgh Regional fairs, where top projects can qualify to represent Pennsylvania at ISEF. The second is the Pennsylvania Junior Academy of Science (PJAS), a statewide organization that runs regional and state competitions built around oral presentations of student research. Both are excellent ways to develop and present your work; they simply operate separately.

Pennsylvania's ISEF-Affiliated Regional Fairs

Find your regional fair by county, then aim to advance toward ISEF qualification. Dates below are for the 2026 cycle, always confirm the current schedule and deadlines on each fair's official site, as they shift annually.

Understanding PJAS

The Pennsylvania Junior Academy of Science is a statewide organization for grades 7–12, sponsored by the Pennsylvania Academy of Science and affiliated with the American Association for the Advancement of Science. It divides the Commonwealth into 12 regions, each running its own competition.

To participate, you conduct a research project in one of PJAS's scientific categories, then present it orally to a team of judges at a regional competition. Every student needs an adult sponsor, a teacher, parent, or scientist, to guide them through the process and paperwork. Advancement to the PJAS State Meeting is based on your participation and awards at the regional level.

A few PJAS rules are worth knowing early, since they're stricter than some fairs.

• The student who did the research must be the one presenting, with no substitutes.

• You may present a new phase of an ongoing project, but you can't re-present last year's topic without significant new research.

• Measurements must be in metric. Projects that don't use metric can't receive a first-place award, regardless of score.

Always read the current presentation and scoring guidelines on the official PJAS site before you compete.

How to Win at Pennsylvania Science Fairs

Whichever pathway you choose, the fundamentals of a winning project are the same.

1. Choose a Compelling Project

Pick a topic you're genuinely passionate about. Your project should be original, address a real-world problem, and demonstrate real scientific thinking, since judges are looking for innovation and potential impact.

If you need help brainstorming, our guide to coming up with a winning science fair idea walks through how to land on a strong one.

2. Master the Scientific Method (or Engineering Design Process)

Pennsylvania's fairs reward rigor, so choose the framework that fits. For a science project, follow the scientific method: identify a question, research existing knowledge, form a testable hypothesis, run an experiment to collect data, analyze whether it supports your hypothesis, and draw conclusions.

For an engineering project, use the design process: define the problem, research and design solutions, build a prototype, test and improve it, then communicate your findings.

3. Conduct Thorough Research

Solid research is the backbone of any winning project. Start with a comprehensive literature review using reputable sources like scientific journals and academic books, collect data with reliable methods (keeping it organized in a doc or spreadsheet), and analyze it with appropriate statistical or qualitative methods, ready to explain your approach clearly.

4. Craft an Outstanding Presentation

Your presentation can make a real impact, and it matters especially in PJAS, where judging is built around your oral presentation. Keep your language clear and jargon-free, use high-quality, relevant visuals like graphs and charts, and rehearse repeatedly for a smooth, confident delivery.

For a full walkthrough, our guide to building a standout science fair poster covers how to design a board that stands out.

5. Understand the Judging Criteria

Knowing how you'll be judged is crucial. Criteria vary slightly by fair, but judges typically evaluate scientific thought and engineering goals (your depth of understanding), creativity and originality, thoroughness (the completeness of your data and analysis), skill (the expertise shown in your work), and clarity (how effectively you present it). Building your project directly against these criteria is one of the simplest ways to gain an edge.

6. Practice Your Presentation

Prepare a clear, engaging walkthrough you can deliver in both simple and technical terms, and rehearse answers to the questions judges are likely to ask. It's worth reading how to get advice from a science fair winner to prepare for that Q&A the way top competitors do.

Beyond Pennsylvania

Doing well at a Pennsylvania fair can be a springboard to bigger stages. If you're looking for a specific project starting point, our winning science fair project ideas are a good source, and our guide on how to find and compete in the best science fair near you helps you map your path from local fairs all the way to ISEF.

Equip Yourself to Win With ScienceFair

Winning at a Pennsylvania science fair takes a strong project, rigorous research, and a confident presentation, and that's exactly what ScienceFair helps you build. Every coach on our team is a past science fair winner, and alongside our Ivy League research mentors, they'll help you refine your idea, strengthen your research, and prepare for the judges' Q&A.

Ready to make your run at a Pennsylvania science fair? Schedule a call with our academic advisor.