diff --git a/.changeset/tame-bananas-work.md b/.changeset/tame-bananas-work.md
new file mode 100644
index 0000000000..60c33b05c3
--- /dev/null
+++ b/.changeset/tame-bananas-work.md
@@ -0,0 +1,5 @@
+---
+"react-router": minor
+---
+
+fix: prevent JSON-LD duplication and hydration mismatch in React 19 by using stable index-based keys and adding suppressHydrationWarning.
diff --git a/contributors.yml b/contributors.yml
index daa45d0f08..9ed3480469 100644
--- a/contributors.yml
+++ b/contributors.yml
@@ -474,3 +474,4 @@
 - zeromask1337
 - zheng-chuang
 - zxTomw
+- Ammar123890
\ No newline at end of file
diff --git a/packages/react-router/lib/dom/ssr/components.tsx b/packages/react-router/lib/dom/ssr/components.tsx
index 2e0f101511..0d66597e33 100644
--- a/packages/react-router/lib/dom/ssr/components.tsx
+++ b/packages/react-router/lib/dom/ssr/components.tsx
@@ -621,7 +621,7 @@ export function Meta(): React.JSX.Element {
 
   return (
     <>
-      {meta.flat().map((metaProps) => {
+      {meta.flat().map((metaProps, index) => {
         if (!metaProps) {
           return null;
         }
@@ -656,10 +656,13 @@ export function Meta(): React.JSX.Element {
         if ("script:ld+json" in metaProps) {
           try {
             let json = JSON.stringify(metaProps["script:ld+json"]);
+            let ldJsonKey = `script:ld+json:${index}`;
+
             return (
               <script
-                key={`script:ld+json:${json}`}
+                key={ldJsonKey}
                 type="application/ld+json"
+                suppressHydrationWarning
                 dangerouslySetInnerHTML={{ __html: escapeHtml(json) }}
               />
             );
@@ -667,7 +670,7 @@ export function Meta(): React.JSX.Element {
             return null;
           }
         }
-        return <meta key={JSON.stringify(metaProps)} {...metaProps} />;
+        return <meta key={index} {...metaProps} />;
       })}
     </>
   );