Roundup Cancer Lawsuits
Last updated: September 6, 2026
Roundup is the weed killer most people in the country have either used or watched someone use. The lawsuits come from people who sprayed it for years, on farms, on golf courses, along roadsides and around school grounds, and were later told they had non-Hodgkin lymphoma, a cancer of the immune system.
Their claim is that the companies selling it knew there was a cancer risk and never put it on the label. This page covers what the cases say, who brings them, and what tends to matter. It will not tell you whether you have a case. That turns on your own facts, and it is what a free case review is for.
This page is general legal education about Roundup litigation. It is not medical or legal advice.
On June 25, 2026 the Supreme Court ruled for Monsanto in Monsanto Co. v. Durnell, holding 7–2 that federal law blocks a state claim built on the EPA-approved label. That knocked out the theory most of these cases were built on, though it did not end them. A proposed settlement is also working through approval. Both are moving, and we track them on Roundup Lawsuit Updates.
- These cases claim that years of glyphosate exposure caused non-Hodgkin lymphoma.
- Most people bringing them sprayed for a living, though heavy home use comes up too.
- What usually matters is how long you used it, which product, and when you were diagnosed.
- Whether glyphosate causes cancer is still argued over, and that argument decides these cases.
- A Supreme Court ruling in June 2026 narrowed the main legal theory.
- What Is Glyphosate? — the chemical behind Roundup
- Is Roundup Dangerous to Humans? — what the research says
- Roundup and Non-Hodgkin Lymphoma — the illness at the center
- Glyphosate Exposure Symptoms
- Roundup Lawsuit Updates — where the cases stand
- Monsanto v. Durnell: What the Court Held
What Roundup Is
Roundup is a weed killer. Its active ingredient is glyphosate, and it has been sprayed for decades on farms, on commercial grounds, and in back gardens. Monsanto brought it to market. Bayer bought Monsanto in 2018 and inherited both the product and the lawsuits.
Glyphosate is not only in Roundup. Plenty of other weed killers on the shelf contain it, which is why working out what you actually sprayed can matter. More on the chemical is on What Is Glyphosate?
What These Lawsuits Say
The core claim is short. Long, repeated exposure to glyphosate raises the risk of non-Hodgkin lymphoma. Monsanto knew that, or should have, and sold the product for years without saying so on the label.
From there the arguments branch. Some claim the product was dangerous as designed. Some claim the company shaped the science and buried what did not suit it. All of them rest on the same disputed question, which is whether glyphosate causes cancer at all.
The Illness at the Center
- Non-Hodgkin lymphoma, a cancer that starts in the immune system
- Its subtypes, including diffuse large B-cell and follicular lymphoma
- Other cancers raised less often in these cases
Non-Hodgkin lymphoma is the diagnosis nearly every one of these cases is built around, and Roundup and Non-Hodgkin Lymphoma covers it on its own. If you are working from a diagnosis rather than a product, start with Cancers Linked to Lawsuits.
Diagnosed with non-Hodgkin lymphoma after long-term Roundup or glyphosate exposure? You may qualify for a free case review.
Check My EligibilityWhere Exposure Happened
- Farm work and crop spraying
- Landscaping, golf courses, and grounds crews
- Weed control along roads, rail lines, and utility corridors
- Mixing and loading the concentrate
- Heavy use around a home or property, season after season
The cases that go furthest tend to involve people who handled it as part of a job, year in and year out. That is not a rule, but it is the pattern.
What the Claims Are Built On
- Failure to warn about the cancer risk
- Defective design of the product
- Negligence in how it was tested and sold
- Hiding or shaping what the science showed
Why These Cases Are Hard
Time is the first problem. Cancer can show up long after the spraying stopped, and receipts and records rarely survive that gap.
The science is the second. Regulators have not agreed with each other, which cuts both ways in a courtroom. And since June 2026 there is a third problem: the Supreme Court has ruled that the main legal theory in these cases is blocked where it rests on the approved label. What survives that is being fought over right now.
What Records Matter
Most of the work is showing what you sprayed, for how long, and when you got sick. Anything that ties you to the product in those years helps.
- Where you worked, and doing what
- Which products you used, and roughly how often
- Receipts, invoices, or purchase records
- Spray logs and application records
- Your diagnosis and the medical records behind it
- Coworkers or family who saw the work
- Photographs of containers or equipment
Missing paperwork is normal and not the end of a claim. More on gathering it is on What Evidence Helps a Lawsuit? and How Lawsuits Work.
How This Fits With Other Pesticide Cases
Roundup sits inside a wider group of claims about farm chemicals making people ill. The nearest relative is Paraquat Parkinson’s Lawsuits, a different chemical and a different illness, but the same shape of argument. The wider category is on Pesticide Exposure Lawsuits and Chemical Exposure Lawsuits.
People comparing symptoms across chemicals often also read Chemical Exposure Symptoms and Glyphosate Exposure Symptoms.
Related Lawsuit Topics
Cancers Linked to Lawsuits
Explore broader lawsuit topics involving cancer diagnoses, toxic exposures, and product-related allegations.
Chemical Exposure Lawsuits
Review broader chemical exposure claims involving warning issues, causation questions, and long-term exposure allegations.
Pesticide Exposure Lawsuits
See how pesticide-related claims may overlap with Roundup, agricultural work, and repeated herbicide exposure.
Toxic Exposure Lawsuits
Learn how toxic exposure cases may involve products, chemicals, workplaces, and broader environmental exposure issues.
Product Liability Lawsuits
Understand how warning and safety allegations may fit into product-based litigation involving chemical products.
Illnesses Linked to Lawsuits
Browse illness-focused pages that connect diagnoses, exposure history, and broader legal education topics.
Paraquat Parkinson’s Lawsuits
Compare another major pesticide-related category involving repeated herbicide exposure allegations.
Chemical Exposure Symptoms
Review symptom-focused education pages when comparing exposure history and diagnosis timing.
For where this litigation stands right now alongside the other major dockets, see the litigation status tracker, which is updated as cases move.
Find Out If You May Have a Case
If you've been diagnosed with non-Hodgkin lymphoma or another illness after long-term Roundup, glyphosate, or other herbicide exposure, you can request a free, no-obligation case review on Lawsuit Center.
Educational purposes only. Submitting a case review request does not create an attorney-client relationship.
Related Legal Guides
How Lawsuits Work
Get a simple overview of how legal claims are investigated, filed, and resolved over time.
How Long Do Lawsuits Take?
Learn what can affect the timeline of a lawsuit and why some claims take longer than others.
Mass Torts
Understand how coordinated proceedings work when many similar claims move through court together.
Product Liability Lawsuits
See how warning, safety, and defect allegations may fit into product-based legal claims.
What Evidence Helps a Lawsuit?
Review the kinds of records and documentation that may matter in exposure-related claims.
