diff --git a/.changeset/rocket-lizards-congregate.md b/.changeset/rocket-lizards-congregate.md
new file mode 100644
index 0000000000..f4cd50aa36
--- /dev/null
+++ b/.changeset/rocket-lizards-congregate.md
@@ -0,0 +1,10 @@
+---
+'@backstage/plugin-catalog': minor
+---
+
+The URL path for a catalog entity has changed,
+
+- from: `/catalog/:kind/:optionalNamespaceAndName`
+- to: `/catalog/:namespace/:kind/:name`
+
+Redirects are in place, so disruptions for users should not happen.
diff --git a/plugins/catalog/src/components/CatalogPage/CatalogPage.tsx b/plugins/catalog/src/components/CatalogPage/CatalogPage.tsx
index ea99753c14..00be785754 100644
--- a/plugins/catalog/src/components/CatalogPage/CatalogPage.tsx
+++ b/plugins/catalog/src/components/CatalogPage/CatalogPage.tsx
@@ -31,7 +31,7 @@ import React, { useCallback, useMemo, useState } from 'react';
 import { Link as RouterLink } from 'react-router-dom';
 import { catalogApiRef } from '../../api/types';
 import { EntityFilterGroupsProvider, useFilteredEntities } from '../../filter';
-import { useStarredEntities } from '../../hooks/useStarredEntites';
+import { useStarredEntities } from '../../hooks/useStarredEntities';
 import { ButtonGroup, CatalogFilter } from '../CatalogFilter/CatalogFilter';
 import { CatalogTable } from '../CatalogTable/CatalogTable';
 import { ResultsFilter } from '../ResultsFilter/ResultsFilter';
diff --git a/plugins/catalog/src/components/CatalogTable/CatalogTable.tsx b/plugins/catalog/src/components/CatalogTable/CatalogTable.tsx
index 4e63c6099b..4d97ea4334 100644
--- a/plugins/catalog/src/components/CatalogTable/CatalogTable.tsx
+++ b/plugins/catalog/src/components/CatalogTable/CatalogTable.tsx
@@ -22,8 +22,8 @@ import { Alert } from '@material-ui/lab';
 import React from 'react';
 import { generatePath, Link as RouterLink } from 'react-router-dom';
 import { findLocationForEntityMeta } from '../../data/utils';
-import { useStarredEntities } from '../../hooks/useStarredEntites';
-import { entityRoute } from '../../routes';
+import { useStarredEntities } from '../../hooks/useStarredEntities';
+import { entityRoute, entityRouteParams } from '../../routes';
 import {
   favouriteEntityIcon,
   favouriteEntityTooltip,
@@ -38,13 +38,7 @@ const columns: TableColumn<Entity>[] = [
       <Link
         component={RouterLink}
         to={generatePath(entityRoute.path, {
-          optionalNamespaceAndName: [
-            entity.metadata.namespace,
-            entity.metadata.name,
-          ]
-            .filter(Boolean)
-            .join(':'),
-          kind: entity.kind,
+          ...entityRouteParams(entity),
           selectedTabId: 'overview',
         })}
       >
diff --git a/plugins/catalog/src/components/EntityPageLayout/EntityPageLayout.tsx b/plugins/catalog/src/components/EntityPageLayout/EntityPageLayout.tsx
index fa5a6292af..8c48d69413 100644
--- a/plugins/catalog/src/components/EntityPageLayout/EntityPageLayout.tsx
+++ b/plugins/catalog/src/components/EntityPageLayout/EntityPageLayout.tsx
@@ -13,17 +13,17 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import React, { useState, useContext } from 'react';
-import { useParams, useNavigate } from 'react-router';
-
-import { EntityContext } from '../../hooks/useEntity';
-import { Page, Header, HeaderLabel, Content, Progress } from '@backstage/core';
 import { Entity, ENTITY_DEFAULT_NAMESPACE } from '@backstage/catalog-model';
-import { FavouriteEntity } from '../FavouriteEntity/FavouriteEntity';
+import { Content, Header, HeaderLabel, Page, Progress } from '@backstage/core';
 import { Box } from '@material-ui/core';
-import { EntityContextMenu } from '../EntityContextMenu/EntityContextMenu';
-import { UnregisterEntityDialog } from '../UnregisterEntityDialog/UnregisterEntityDialog';
 import { Alert } from '@material-ui/lab';
+import React, { PropsWithChildren, useContext, useState } from 'react';
+import { useNavigate } from 'react-router';
+import { EntityContext } from '../../hooks/useEntity';
+import { EntityContextMenu } from '../EntityContextMenu/EntityContextMenu';
+import { FavouriteEntity } from '../FavouriteEntity/FavouriteEntity';
+import { UnregisterEntityDialog } from '../UnregisterEntityDialog/UnregisterEntityDialog';
+import { useEntityCompoundName } from '../useEntityCompoundName';
 import { Tabbed } from './Tabbed';
 
 const EntityPageTitle = ({
@@ -62,17 +62,8 @@ function headerProps(
   };
 }
 
-export const EntityPageLayout = ({
-  children,
-}: {
-  children?: React.ReactNode;
-}) => {
-  const { optionalNamespaceAndName, kind } = useParams() as {
-    optionalNamespaceAndName: string;
-    kind: string;
-  };
-  const [name, namespace] = optionalNamespaceAndName.split(':').reverse();
-
+export const EntityPageLayout = ({ children }: PropsWithChildren<{}>) => {
+  const { kind, namespace, name } = useEntityCompoundName();
   const { entity, loading, error } = useContext(EntityContext);
   const { headerTitle, headerType } = headerProps(
     kind,
diff --git a/plugins/catalog/src/components/FavouriteEntity/FavouriteEntity.tsx b/plugins/catalog/src/components/FavouriteEntity/FavouriteEntity.tsx
index bd2c71891d..ec1857fcf8 100644
--- a/plugins/catalog/src/components/FavouriteEntity/FavouriteEntity.tsx
+++ b/plugins/catalog/src/components/FavouriteEntity/FavouriteEntity.tsx
@@ -18,7 +18,7 @@ import React, { ComponentProps } from 'react';
 import { IconButton, Tooltip, withStyles } from '@material-ui/core';
 import StarBorder from '@material-ui/icons/StarBorder';
 import Star from '@material-ui/icons/Star';
-import { useStarredEntities } from '../../hooks/useStarredEntites';
+import { useStarredEntities } from '../../hooks/useStarredEntities';
 import { Entity } from '@backstage/catalog-model';
 
 type Props = ComponentProps<typeof IconButton> & { entity: Entity };
diff --git a/plugins/catalog/src/components/Router.tsx b/plugins/catalog/src/components/Router.tsx
index 0a002ba907..fe1ba3a593 100644
--- a/plugins/catalog/src/components/Router.tsx
+++ b/plugins/catalog/src/components/Router.tsx
@@ -13,16 +13,17 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+import { ENTITY_DEFAULT_NAMESPACE } from '@backstage/catalog-model';
+import { Content } from '@backstage/core';
+import { Link, Typography } from '@material-ui/core';
 import React, { ComponentType } from 'react';
+import { Navigate, Route, Routes, useParams } from 'react-router';
+import { useEntity } from '../hooks/useEntity';
+import { entityRoute, rootRoute } from '../routes';
 import { CatalogPage } from './CatalogPage';
 import { EntityNotFound } from './EntityNotFound';
 import { EntityPageLayout } from './EntityPageLayout';
-import { Route, Routes } from 'react-router';
-import { entityRoute, rootRoute } from '../routes';
-import { Content } from '@backstage/core';
-import { Typography, Link } from '@material-ui/core';
 import { EntityProvider } from './EntityProvider';
-import { useEntity } from '../hooks/useEntity';
 
 const DefaultEntityPage = () => (
   <EntityPageLayout>
@@ -56,6 +57,18 @@ const EntityPageSwitch = ({ EntityPage }: { EntityPage: ComponentType }) => {
   return <EntityPage />;
 };
 
+const OldEntityRouteRedirect = () => {
+  const { optionalNamespaceAndName, '*': rest } = useParams() as any;
+  const [name, namespace] = optionalNamespaceAndName.split(':').reverse();
+  const namespaceLower = namespace?.toLowerCase() ?? ENTITY_DEFAULT_NAMESPACE;
+  const restWithSlash = rest ? `/${rest}` : '';
+  return (
+    <Navigate
+      to={`../../${namespaceLower}/component/${name}${restWithSlash}`}
+    />
+  );
+};
+
 export const Router = ({
   EntityPage = DefaultEntityPage,
 }: {
@@ -71,5 +84,9 @@ export const Router = ({
         </EntityProvider>
       }
     />
+    <Route
+      path="Component/:optionalNamespaceAndName/*"
+      element={<OldEntityRouteRedirect />}
+    />
   </Routes>
 );
diff --git a/plugins/catalog/src/components/useEntityCompoundName.ts b/plugins/catalog/src/components/useEntityCompoundName.ts
index 2be23cb6d9..dd9c0d26ff 100644
--- a/plugins/catalog/src/components/useEntityCompoundName.ts
+++ b/plugins/catalog/src/components/useEntityCompoundName.ts
@@ -16,11 +16,9 @@
 import { useParams } from 'react-router';
 
 /**
- * Grabs entity kind and name + optional namespace from location
+ * Grabs entity kind, namespace, and name from the location
  */
 export const useEntityCompoundName = () => {
-  const params = useParams();
-  const { kind, optionalNamespaceAndName = '' } = params;
-  const [name, namespace] = optionalNamespaceAndName.split(':').reverse();
-  return { kind, name, namespace };
+  const { kind, namespace, name } = useParams();
+  return { kind, namespace, name };
 };
diff --git a/plugins/catalog/src/hooks/useEntity.ts b/plugins/catalog/src/hooks/useEntity.ts
index 77ea8c1569..1c5b94b8c1 100644
--- a/plugins/catalog/src/hooks/useEntity.ts
+++ b/plugins/catalog/src/hooks/useEntity.ts
@@ -13,12 +13,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import { useEffect, createContext, useContext } from 'react';
-import { useNavigate, useParams } from 'react-router';
-import { useApi, errorApiRef } from '@backstage/core';
-import { catalogApiRef } from '../api/types';
-import { useAsync } from 'react-use';
 import { Entity } from '@backstage/catalog-model';
+import { errorApiRef, useApi } from '@backstage/core';
+import { createContext, useContext, useEffect } from 'react';
+import { useNavigate } from 'react-router';
+import { useAsync } from 'react-use';
+import { catalogApiRef } from '../api/types';
+import { useEntityCompoundName } from '../components/useEntityCompoundName';
 
 type EntityLoadingStatus = {
   entity?: Entity;
@@ -33,8 +34,7 @@ export const EntityContext = createContext<EntityLoadingStatus>({
 });
 
 export const useEntityFromUrl = (): EntityLoadingStatus => {
-  const { optionalNamespaceAndName, kind } = useParams();
-  const [name, namespace] = optionalNamespaceAndName.split(':').reverse();
+  const { kind, namespace, name } = useEntityCompoundName();
   const navigate = useNavigate();
   const errorApi = useApi(errorApiRef);
   const catalogApi = useApi(catalogApiRef);
diff --git a/plugins/catalog/src/hooks/useStarredEntities.test.tsx b/plugins/catalog/src/hooks/useStarredEntities.test.tsx
index 6c98690553..345bc9f04f 100644
--- a/plugins/catalog/src/hooks/useStarredEntities.test.tsx
+++ b/plugins/catalog/src/hooks/useStarredEntities.test.tsx
@@ -16,7 +16,7 @@
 
 import React from 'react';
 import { renderHook, act } from '@testing-library/react-hooks';
-import { useStarredEntities } from './useStarredEntites';
+import { useStarredEntities } from './useStarredEntities';
 import {
   ApiProvider,
   ApiRegistry,
diff --git a/plugins/catalog/src/hooks/useStarredEntites.ts b/plugins/catalog/src/hooks/useStarredEntities.ts
similarity index 100%
rename from plugins/catalog/src/hooks/useStarredEntites.ts
rename to plugins/catalog/src/hooks/useStarredEntities.ts
diff --git a/plugins/catalog/src/routes.ts b/plugins/catalog/src/routes.ts
index 14e23ff73b..a39883e92b 100644
--- a/plugins/catalog/src/routes.ts
+++ b/plugins/catalog/src/routes.ts
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+import { Entity, ENTITY_DEFAULT_NAMESPACE } from '@backstage/catalog-model';
 import { createRouteRef } from '@backstage/core';
 
 const NoIcon = () => null;
@@ -25,6 +26,17 @@ export const rootRoute = createRouteRef({
 });
 export const entityRoute = createRouteRef({
   icon: NoIcon,
-  path: ':kind/:optionalNamespaceAndName/*',
+  path: ':namespace/:kind/:name/*',
   title: 'Entity',
 });
+
+// Utility function to get suitable route params for entityRoute, given an
+// entity instance
+export function entityRouteParams(entity: Entity) {
+  return {
+    kind: entity.kind.toLowerCase(),
+    namespace:
+      entity.metadata.namespace?.toLowerCase() ?? ENTITY_DEFAULT_NAMESPACE,
+    name: entity.metadata.name,
+  } as const;
+}
diff --git a/plugins/register-component/src/components/RegisterComponentResultDialog/RegisterComponentResultDialog.tsx b/plugins/register-component/src/components/RegisterComponentResultDialog/RegisterComponentResultDialog.tsx
index c75235c6cb..9631865ffb 100644
--- a/plugins/register-component/src/components/RegisterComponentResultDialog/RegisterComponentResultDialog.tsx
+++ b/plugins/register-component/src/components/RegisterComponentResultDialog/RegisterComponentResultDialog.tsx
@@ -14,23 +14,23 @@
  * limitations under the License.
  */
 
-import React from 'react';
+import { Entity } from '@backstage/catalog-model';
+import { RouteRef, StructuredMetadataTable } from '@backstage/core';
+import { entityRoute, entityRouteParams } from '@backstage/plugin-catalog';
 import {
+  Button,
   Dialog,
-  DialogTitle,
+  DialogActions,
   DialogContent,
   DialogContentText,
+  DialogTitle,
+  Divider,
+  Link,
   List,
   ListItem,
-  Link,
-  Divider,
-  DialogActions,
-  Button,
 } from '@material-ui/core';
-import { Entity } from '@backstage/catalog-model';
-import { StructuredMetadataTable, RouteRef } from '@backstage/core';
+import React from 'react';
 import { generatePath, resolvePath } from 'react-router';
-import { entityRoute } from '@backstage/plugin-catalog';
 import { Link as RouterLink } from 'react-router-dom';
 
 type Props = {
@@ -47,22 +47,16 @@ const getEntityCatalogPath = ({
   entity: Entity;
   catalogRouteRef: RouteRef;
 }) => {
-  const optionalNamespaceAndName = [
-    entity.metadata.namespace,
-    entity.metadata.name,
-  ]
-    .filter(Boolean)
-    .join(':');
-
-  const relativeEntityPathInsideCatalog = generatePath(entityRoute.path, {
-    optionalNamespaceAndName,
-    kind: entity.kind,
-  });
+  const relativeEntityPathInsideCatalog = generatePath(
+    entityRoute.path,
+    entityRouteParams(entity),
+  );
 
   const resolvedAbsolutePath = resolvePath(
     relativeEntityPathInsideCatalog,
     catalogRouteRef.path,
   )?.pathname;
+
   return resolvedAbsolutePath;
 };
 
diff --git a/plugins/scaffolder/src/components/JobStatusModal/JobStatusModal.tsx b/plugins/scaffolder/src/components/JobStatusModal/JobStatusModal.tsx
index c531e0ec2c..b97a19148e 100644
--- a/plugins/scaffolder/src/components/JobStatusModal/JobStatusModal.tsx
+++ b/plugins/scaffolder/src/components/JobStatusModal/JobStatusModal.tsx
@@ -13,21 +13,21 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import React, { useState, useEffect } from 'react';
-import {
-  Dialog,
-  LinearProgress,
-  DialogTitle,
-  DialogContent,
-  DialogActions,
-} from '@material-ui/core';
-import { JobStage } from '../JobStage/JobStage';
-import { useJobPolling } from './useJobPolling';
-import { Job } from '../../types';
 import { TemplateEntityV1alpha1 } from '@backstage/catalog-model';
 import { Button } from '@backstage/core';
-import { entityRoute } from '@backstage/plugin-catalog';
+import { entityRoute, entityRouteParams } from '@backstage/plugin-catalog';
+import {
+  Dialog,
+  DialogActions,
+  DialogContent,
+  DialogTitle,
+  LinearProgress,
+} from '@material-ui/core';
+import React, { useEffect, useState } from 'react';
 import { generatePath } from 'react-router-dom';
+import { Job } from '../../types';
+import { JobStage } from '../JobStage/JobStage';
+import { useJobPolling } from './useJobPolling';
 
 type Props = {
   onClose: () => void;
@@ -75,15 +75,10 @@ export const JobStatusModal = ({
       {entity && (
         <DialogActions>
           <Button
-            to={generatePath(`/catalog/${entityRoute.path}`, {
-              kind: entity.kind,
-              optionalNamespaceAndName: [
-                entity.metadata.namespace,
-                entity.metadata.name,
-              ]
-                .filter(Boolean)
-                .join(':'),
-            })}
+            to={generatePath(
+              `/catalog/${entityRoute.path}`,
+              entityRouteParams(entity),
+            )}
           >
             View in catalog
           </Button>