diff --git a/.server-changes/limit-account-email-length.md b/.server-changes/limit-account-email-length.md
new file mode 100644
index 0000000000..2259f007e0
--- /dev/null
+++ b/.server-changes/limit-account-email-length.md
@@ -0,0 +1,6 @@
+---
+area: webapp
+type: fix
+---
+
+Limit account settings email input to 254 characters.
diff --git a/apps/webapp/app/routes/account._index/route.tsx b/apps/webapp/app/routes/account._index/route.tsx
index 99ef9b87bb..341141e638 100644
--- a/apps/webapp/app/routes/account._index/route.tsx
+++ b/apps/webapp/app/routes/account._index/route.tsx
@@ -22,6 +22,7 @@ import { useUser } from "~/hooks/useUser";
 import { redirectWithSuccessMessage } from "~/models/message.server";
 import { updateUser } from "~/models/user.server";
 import { requireUserId } from "~/services/session.server";
+import { emailSchema, MAX_EMAIL_LENGTH } from "~/utils/emailValidation";
 import { accountPath } from "~/utils/pathBuilder";
 
 export const meta: MetaFunction = () => {
@@ -42,10 +43,8 @@ function createSchema(
       .string({ required_error: "You must enter a name" })
       .min(2, "Your name must be at least 2 characters long")
       .max(50),
-    email: z
-      .string()
-      .email()
-      .superRefine((email, ctx) => {
+    email: emailSchema.pipe(
+      z.string().superRefine((email, ctx) => {
         if (constraints.isEmailUnique === undefined) {
           //client-side validation skips this
           ctx.addIssue({
@@ -65,7 +64,8 @@ function createSchema(
             });
           });
         }
-      }),
+      })
+    ),
     marketingEmails: z.preprocess((value) => value === "on", z.boolean()),
   });
 }
@@ -177,6 +177,7 @@ export default function Page() {
                 <div className="flex w-56 flex-none flex-col gap-1">
                   <Input
                     {...getInputProps(email, { type: "text" })}
+                    maxLength={MAX_EMAIL_LENGTH}
                     placeholder="Your email"
                     defaultValue={user?.email ?? ""}
                   />
diff --git a/apps/webapp/app/routes/confirm-basic-details.tsx b/apps/webapp/app/routes/confirm-basic-details.tsx
index 9187823a73..4e37091324 100644
--- a/apps/webapp/app/routes/confirm-basic-details.tsx
+++ b/apps/webapp/app/routes/confirm-basic-details.tsx
@@ -27,6 +27,7 @@ import { useUser } from "~/hooks/useUser";
 import { redirectWithSuccessMessage } from "~/models/message.server";
 import { updateUser } from "~/models/user.server";
 import { requireUserId } from "~/services/session.server";
+import { emailSchema, MAX_EMAIL_LENGTH } from "~/utils/emailValidation";
 import { rootPath } from "~/utils/pathBuilder";
 import { getVercelInstallParams } from "~/v3/vercel";
 
@@ -72,10 +73,8 @@ function createSchema(
   return z
     .object({
       name: z.string().min(3, "Your name must be at least 3 characters").max(50),
-      email: z
-        .string()
-        .email()
-        .superRefine((email, ctx) => {
+      email: emailSchema.pipe(
+        z.string().superRefine((email, ctx) => {
           if (constraints.isEmailUnique === undefined) {
             ctx.addIssue({
               code: z.ZodIssueCode.custom,
@@ -93,8 +92,9 @@ function createSchema(
               });
             });
           }
-        }),
-      confirmEmail: z.string(),
+        })
+      ),
+      confirmEmail: emailSchema,
       referralSource: z.string().optional(),
       referralSourceOther: z.string().optional(),
       role: z.string().optional(),
@@ -290,6 +290,7 @@ export default function Page() {
                 </Label>
                 <Input
                   {...getInputProps(email, { type: "email" })}
+                  maxLength={MAX_EMAIL_LENGTH}
                   defaultValue={enteredEmail}
                   onChange={(e) => {
                     setEnteredEmail(e.target.value);
@@ -306,6 +307,7 @@ export default function Page() {
                   <Label htmlFor={confirmEmail.id}>Confirm email</Label>
                   <Input
                     {...getInputProps(confirmEmail, { type: "email" })}
+                    maxLength={MAX_EMAIL_LENGTH}
                     placeholder="Your email, again"
                     icon={EnvelopeIcon}
                     spellCheck={false}
diff --git a/apps/webapp/app/utils/emailValidation.ts b/apps/webapp/app/utils/emailValidation.ts
new file mode 100644
index 0000000000..2c4d3952db
--- /dev/null
+++ b/apps/webapp/app/utils/emailValidation.ts
@@ -0,0 +1,8 @@
+import { z } from "zod";
+
+export const MAX_EMAIL_LENGTH = 254;
+
+export const emailSchema = z
+  .string()
+  .email()
+  .max(MAX_EMAIL_LENGTH, `Email must be ${MAX_EMAIL_LENGTH} characters or fewer`);