Washington University in St. Louis requires one primary supplemental essay and offers an additional optional response with two prompt choices, each ranging from 200 to 250 words. They’re short, but they do a lot of heavy lifting in telling the admissions officers who you are beyond your grades, which is important, especially with WashU’s acceptance rate of 12%.
This guide breaks down each prompt: what WashU is actually asking, how to choose a clear angle, and how to write responses that feel specific, intentional, and memorable.
- WashU Supplemental Essay Prompts
- How to Write the Required “Why Major” WashU Supplemental Essay
- How to Write the Optional “Contribution to Community” WashU Supplemental Essay
- How to Write the Optional “Life Story” WashU Supplemental Essay
- Writing WashU Supplemental Essays That Work
- Frequently Asked Questions
- Takeaways
WashU Supplemental Essay Prompts
WashU accepts applications through the Common App or Coalition. Aside from the personal statement, you also have WashU-specific questions. You only need one essay, but you have the option of submitting a second one, which you’ll choose from two prompts.
| Required prompt |
| Please tell us what you are interested in studying at college and why. Undecided about your academic interest(s)? Don’t worry—tell us what excites you about the academic division you selected. Remember that all of our first-year students enter officially “undeclared” and work closely with their team of academic advisors to discover their academic passions. You can explore all of our majors and programs on our website. (200 words) |
| Optional prompts |
|
It’s also worth noting that WashU has an optional video supplement. Unlike many schools that rely solely on written essays, WashU offers applicants the opportunity to introduce themselves through a short, personal video.
Not sure if one essay is enough to complete your application? We’ll talk about all the prompts below to help you decide which aspects of your personality and background you’d like to share.
How to Write the Required “Why Major” WashU Supplemental Essay
| Prompt |
| Please tell us what you are interested in studying at college and why. Undecided about your academic interest(s)? Don’t worry—tell us what excites you about the academic division you selected. Remember that all of our first-year students enter officially “undeclared” and work closely with their team of academic advisors to discover their academic passions. You can explore all of our majors and programs on our website. (200 words) |
This prompt is testing academic fit. WashU wants to know what you plan to study and whether your interest is grounded in lived experiences rather than vague curiosity. Mention a specific major or division, connect it to coursework or projects, and name WashU resources (programs, labs, courses) that match your goals.
| WashU “Why Major” Supplemental Essay Example |
| The drivetrain died twelve seconds into the finals at the VEX Robotics World Championship in Houston. Wheels locked, LEDs blinking, I dropped to the carpet with a Fluke multimeter and traced a brownout to scorched traces on an Arduino Uno I had rewired at 1 a.m. The failure was not in our path-planning code, but in power delivery.
That’s why I plan to study the BS Computer Engineering (ESE) program at the McKelvey School of Engineering. In AP Physics C and AP Computer Science A, I learned to chase errors back to first principles. For Regeneron ISEF, I built a low-power FPGA scheduler on a Xilinx Artix-7 for portable diagnostic devices used in Engineers Without Borders clinics. I volunteered during field trials, logging power drops and aborted scans as clinicians worked around shared generators, then restructured clock domains and memory access patterns so scans finished before shutdown. I’m especially excited for CSE 4608: Introduction to Quantum Computing because it treats computation as physics, where superposition and decoherence act as engineering limits. Studying information loss at the quantum level will guide how I design efficient, secure systems for hospitals and power grids that cannot afford failure. (196 words) |
Essay analysis and tips
The prompt asks what you want to study in college and why, but you must also show personal experiences that support that decision. The example above immediately anchors the academic interest in a technical moment that shows hands-on experience and sets up a clear intellectual problem and interest that the writer wants to pursue: power delivery and system reliability
The writer reveals that they want to major in Computer Engineering, then discusses other technical experiences that solidified their interest and demonstrated their initiative to learn more: studying AP Physics C and AP Computer Science A, expanding into the more advanced project of building a low-power FPGA scheduler for Regeneron ISEF, and volunteering during field trials.
After that, the writer highlights a specific course as a next step once they enter WashU. Then, they end with what goal their academic path leads to.
If you’d like to see another response to this prompt, take a look at the one below.
| WashU Supplemental Essay Example |
| I remember the first time I felt the weight of a number. It was fourth grade, and my local library was hosting a penny drive to fight hunger in our city. I watched a volunteer weigh our donation jars; mine was lighter than most. On the way home, I kept wondering how a handful of coins could possibly matter in the face of something so enormous.
Fast-forward to high school, and I found myself running the fundraising side of our community garden. Budgeting, projecting costs, convincing local businesses to donate—it all felt like a puzzle I couldn’t stop solving. But the more I learned, the more questions started piling up. Why do some neighborhoods have thriving food systems while others rely on weekly donations? Why do resources seem to pool in some places and run dry in others? That’s what draws me to study Economics at WashU, with classes like ECONOMICS 382: Socio-Economic Perspectives on Inequality. I’m fascinated by how policies, incentives, and market structures shape access to food, housing, healthcare, and education. I want to understand the systems behind the numbers, so that one day, I can help design smarter solutions to the inequalities I saw as a kid. (200 words) |
How to Write the Optional “Contribution to Community” WashU Supplemental Essay
If you think there’s still something about you that you want WashU to know, you can write a second supplemental essay. We’ll talk about the two prompts you can choose from:
| Prompt |
| WashU supports engagement in the St. Louis community by considering the university as “In St. Louis, For St. Louis.” What is a community you are a part of and your place or impact within it? (250 words) |
This prompt is asking how you contribute to a community through action rather than just membership. WashU wants to see whether you take responsibility, solve problems, and understand the people you serve. Focus on a specific community, describe your role, and show measurable impact through leadership, outreach, or sustained service.
| WashU “contribution to community” supplemental essay example |
| The LeadCare II printed 21.4 µg/dL and jammed, so I swapped the cartridge, replaced the reagent, and watched the number return. The home was built in 1926, and the resident was mixing baby formula at the kitchen sink while I labeled the address on painter’s tape and sealed a 250 mL HDPE bottle for confirmation testing.
I’m a high school student volunteer at the Riverwest Environmental Health Collaborative, a resident-led project mapping lead exposure across Milwaukee’s North Side. My role centers on making data usable: training volunteers to run first-draw and flushed samples, log results in REDCap, interpret ppb readings against CDC action levels, and return for follow-up visits. Working with environmentalists and professionals much older than me was intimidating at first, but highly rewarding. Last July, after three days above 38°C, elevated readings clustered along Sherman Avenue. In ArcGIS Pro, I overlaid results with city pipe replacement records and Sanborn fire insurance maps, pointing to unlined service laterals installed before 1930. At our meeting, I walked families through the map, distributed Brita filters, and handed out a heat-trigger testing schedule. My academic work feeds this mission. In IB Environmental Systems and Societies HL, I used EPA exposure models to trace heavy-metal pathways, and through the MIT THINK Scholars Program, I designed a proposal modeling cumulative lead exposure risk in pre-1970 housing stock. “In St. Louis, For St. Louis” matches how I practice science: listening first, measuring carefully, and returning evidence in a form people can act on. (250 words) |
Essay analysis and tips
This prompt requires three clear elements: the community, your role, and proof of impact. Your essay should make each one easy to identify.
First, name the community specifically. This sample does that immediately by identifying a resident-led environmental health project.
Second, define your role clearly. The writer lists specific tasks, proving what they were accountable for in the community. Notice how these tasks are also similar in that they all center on making data usable. As such, also try to notice if the tasks you were part of have similarities among them that point to a common interest or goal.
Third, demonstrate impact with at least one measurable outcome. Here, the mapping of elevated lead readings leading to action shows results the writer helped achieve.
End by tying your approach back to WashU’s “In St. Louis, For St. Louis” value. Show that your engagement reflects a mindset you would bring to campus.
How to Write the Optional “Life Story” WashU Supplemental Essay
| Prompt |
| WashU strives to know every undergraduate student “By Name & Story.” How have your life experiences shaped your story? (250 words) |
This prompt is asking for personal context rather than accomplishments. WashU wants to understand what shaped your identity, values, and perspective, and how those experiences influenced how you think or act today. Focus on one meaningful moment or pattern in your life, then show how it changed you.
| WashU “Life Story” Supplemental Essay Example |
| Lucia (Latin): light.
I learned the definition at 9 p.m. when the power cut out in Imperial County, California, and my neighbor Nora slid an extension cord across the driveway. “We’ve got one lamp left,” she said, plugging an IKEA desk lamp into a backup power strip so her son could finish algebra before the battery died. Light, I realized, shouldn’t be rationed. My parents named me Lucia before I understood what that asked of me. When rolling outages became routine in summer heat waves, I started asking why illumination failed predictably. In Honors Physics, I tested Kirchhoff’s laws on breadboards; in AP Calculus BC, I modeled battery discharge curves instead of memorizing formulas. I carried those questions into GRID Alternatives, volunteering on solar installs for low-income farmworker housing outside Brawley. We mounted rooftop panels, wired inverters, and stress-tested LED circuits at midday. When one unit flickered after a dust storm, I traced it to uneven load distribution and recalibrated the circuit so it stayed steady after sunset. For my AP Research project, I built and tested a power-stabilization module for off-grid lighting, and measured thermal drift in MOSFET regulators to keep LED output steady under heat. It was the first time my name felt less symbolic and more scientific like the engineer I had aspired to be. In college, I hope to study engineering and build innovative technology such as novel photovoltaics that will contribute toward an environmentally sustainable future. (242 words) |
Essay analysis and tips
This prompt is asking for the deeper thread that shaped who you are. Your response should center on a meaningful moment or pattern and show how it influenced your choices.
Start with a defining detail that introduces that thread. In this sample, the meaning of the name “Lucia” anchors the entire response. Choose something that can carry the essay.
Next, show how that idea influenced your actions over time. The writer moves from experiencing power outages to pursuing physics, solar work, and research. Follow that same structure: A.) moment, B.) shift in perspective, then C.) concrete choices.
Include at least one specific example that proves growth. In the essay, this is seen through the writer’s technical work with circuits and regulators.
End by showing where this thread is heading, how your background shapes what you plan to study or build next.
Writing WashU Supplemental Essays That Work
Across WashU’s three required prompts, the common thread is intentionality. These essays are not asking you to repeat your resume. They are asking you to show academic direction, community impact, and personal depth in a way that feels specific and grounded. The strongest responses usually start with a concrete moment, then build outward into clear reasoning, meaningful reflection, and a forward-looking sense of fit.
For the academic interest prompt, focus on what drives your curiosity and how you have already explored it through coursework, projects, or research. For the “Contribution to Community” prompt, WashU wants proof that you contribute to a community through genuine responsibility rather than surface-level involvement. For the “Life Story” prompt, they are looking for the personal experiences that shaped your mindset, values, and long-term direction.
Because these essays are short, every detail matters. The best WashU supplements start with something concrete, stay specific throughout, and make it apparent what you will bring to campus.
That’s exactly where expert guidance can make a difference. Our Senior Editor College Application Program offers comprehensive support across essays, strategy, and the full application, developed by admissions experts who know what top schools like WashU are actually looking for. We’ve edited and refined 10,000+ essays, and 75% of our students earn acceptance to an Ivy League or Top 10 school. If you’re serious about your WashU application, we’re ready to help you get it right.
Frequently Asked Questions
1. Does WashU require supplemental essays?
Yes. In addition to the Common App personal statement, WashU requires one primary supplemental essay and offers an optional second essay with two prompt choices.
2. How many supplemental essays does WashU have?
WashU requires one supplemental essay. Applicants may also choose to respond to one optional prompt.
3. What’s the word limit for WashU supplemental essays?
WashU’s word limits range from 200 to 250 words, depending on the prompt.
Takeaways
- WashU requires one supplemental essay and offers one optional essay with two prompt choices.
- The prompts are designed to evaluate academic fit, community contribution, and personal story.
- Strong responses lead with a concrete moment, then connect it to clear motivation or impact.
- The best essays show what you did, why it mattered, and how it shaped your direction.
- If you want expert support, our consultants can help you craft WashU essays that are specific, polished, and authentically yours.
Eric Eng
About the author
Eric Eng, the Founder and CEO of AdmissionSight, graduated with a BA from Princeton University and has one of the highest track records in the industry of placing students into Ivy League schools and top 10 universities. He has been featured on the US News & World Report for his insights on college admissions.
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