diff --git a/.changeset/strong-baboons-help.md b/.changeset/strong-baboons-help.md
new file mode 100644
index 0000000000..2c4c19280b
--- /dev/null
+++ b/.changeset/strong-baboons-help.md
@@ -0,0 +1,5 @@
+---
+"ensapi": minor
+---
+
+ENSNode GraphQL API: `ENSv1Domain.rootRegistryOwner` is now available, indicating the owner of the Domain's node within the ENSv1 Registry contract.
diff --git a/apps/ensapi/src/graphql-api/schema/domain.ts b/apps/ensapi/src/graphql-api/schema/domain.ts
index f5bef77132..272a5b7a66 100644
--- a/apps/ensapi/src/graphql-api/schema/domain.ts
+++ b/apps/ensapi/src/graphql-api/schema/domain.ts
@@ -262,6 +262,17 @@ ENSv1DomainRef.implement({
       nullable: true,
       resolve: (parent) => parent.parentId,
     }),
+
+    /////////////////////////////////
+    // ENSv1Domain.rootRegistryOwner
+    /////////////////////////////////
+    rootRegistryOwner: t.field({
+      description:
+        "The rootRegistryOwner of this Domain, i.e. the owner() of this Domain within the ENSv1 Registry.",
+      type: AccountRef,
+      nullable: true,
+      resolve: (parent) => parent.rootRegistryOwnerId,
+    }),
   }),
 });
 
diff --git a/apps/ensindexer/src/plugins/ensv2/handlers/ensv1/ENSv1Registry.ts b/apps/ensindexer/src/plugins/ensv2/handlers/ensv1/ENSv1Registry.ts
index 65af6858cb..91183d21b3 100644
--- a/apps/ensindexer/src/plugins/ensv2/handlers/ensv1/ENSv1Registry.ts
+++ b/apps/ensindexer/src/plugins/ensv2/handlers/ensv1/ENSv1Registry.ts
@@ -76,13 +76,14 @@ export default function () {
     // upsert domain
     await context.db
       .insert(schema.v1Domain)
-      .values({
-        id: domainId,
-        parentId,
-        labelHash,
-      })
+      .values({ id: domainId, parentId, labelHash })
       .onConflictDoNothing();
 
+    // update rootRegistryOwner
+    await context.db
+      .update(schema.v1Domain, { id: domainId })
+      .set({ rootRegistryOwnerId: interpretAddress(owner) });
+
     // materialize domain owner
     // NOTE: despite Domain.ownerId being materialized from other sources of truth (i.e. Registrars
     // like BaseRegistrars & NameWrapper) it's ok to always set it here because the Registrar-emitted
@@ -99,25 +100,25 @@ export default function () {
     context: Context;
     event: EventWithArgs<{ node: Node; owner: Address }>;
   }) {
-    const { node, owner: _owner } = event.args;
-    const owner = interpretAddress(_owner);
+    const { node, owner } = event.args;
 
     // ENSv2 model does not include root node, no-op
     if (node === ROOT_NODE) return;
 
     const domainId = makeENSv1DomainId(node);
 
-    if (owner === null) {
-      await context.db.delete(schema.v1Domain, { id: domainId });
-    } else {
-      // materialize domain owner
-      // NOTE: despite Domain.ownerId being materialized from other sources of truth (i.e. Registrars
-      // like BaseRegistrars & NameWrapper) it's ok to always set it here because the Registrar-emitted
-      // events occur _after_ the Registry events. So when a name is wrapped, for example, the Registry's
-      // owner changes to that of the NameWrapper but then the NameWrapper emits NameWrapped, and this
-      // indexing code re-materializes the Domain.ownerId to the NameWraper-emitted value.
-      await materializeENSv1DomainEffectiveOwner(context, domainId, owner);
-    }
+    // set the domain's rootRegistryOwner to `owner`
+    await context.db
+      .update(schema.v1Domain, { id: domainId })
+      .set({ rootRegistryOwnerId: interpretAddress(owner) });
+
+    // materialize domain owner
+    // NOTE: despite Domain.ownerId being materialized from other sources of truth (i.e. Registrars
+    // like BaseRegistrars & NameWrapper) it's ok to always set it here because the Registrar-emitted
+    // events occur _after_ the Registry events. So when a name is wrapped, for example, the Registry's
+    // owner changes to that of the NameWrapper but then the NameWrapper emits NameWrapped, and this
+    // indexing code re-materializes the Domain.ownerId to the NameWraper-emitted value.
+    await materializeENSv1DomainEffectiveOwner(context, domainId, owner);
   }
 
   /**
diff --git a/packages/ensnode-schema/src/schemas/ensv2.schema.ts b/packages/ensnode-schema/src/schemas/ensv2.schema.ts
index 742d0820d9..028a8f4d1f 100644
--- a/packages/ensnode-schema/src/schemas/ensv2.schema.ts
+++ b/packages/ensnode-schema/src/schemas/ensv2.schema.ts
@@ -174,6 +174,9 @@ export const v1Domain = onchainTable(
     // represents a labelHash
     labelHash: t.hex().notNull().$type<LabelHash>(),
 
+    // may have a `rootRegistryOwner` (ENSv1Registry's owner()), zeroAddress interpreted as null
+    rootRegistryOwnerId: t.hex().$type<Address>(),
+
     // NOTE: Domain-Resolver Relations tracked via Protocol Acceleration plugin
   }),
   (t) => ({
@@ -190,6 +193,11 @@ export const relations_v1Domain = relations(v1Domain, ({ one, many }) => ({
     references: [v1Domain.id],
   }),
   children: many(v1Domain, { relationName: "parent" }),
+  rootRegistryOwner: one(account, {
+    relationName: "rootRegistryOwner",
+    fields: [v1Domain.rootRegistryOwnerId],
+    references: [account.id],
+  }),
 
   // shared
   owner: one(account, {
diff --git a/packages/ensnode-sdk/src/graphql-api/example-queries.ts b/packages/ensnode-sdk/src/graphql-api/example-queries.ts
index 5b346dd74b..7e3a5c3456 100644
--- a/packages/ensnode-sdk/src/graphql-api/example-queries.ts
+++ b/packages/ensnode-sdk/src/graphql-api/example-queries.ts
@@ -101,6 +101,10 @@ query DomainByName($name: Name!) {
     label { interpreted }
     name
 
+    ... on ENSv1Domain {
+      rootRegistryOwner { address }
+    }
+
     ... on ENSv2Domain {
       subregistry {
         contract { chainId address }