diff --git a/docs/src/pages/guides/localization/localization.md b/docs/src/pages/guides/localization/localization.md
index cf675be9280fee..555855f4ec1da8 100644
--- a/docs/src/pages/guides/localization/localization.md
+++ b/docs/src/pages/guides/localization/localization.md
@@ -29,6 +29,7 @@ const theme = createMuiTheme({
 |:-------|:---------|:---------|
 | Azerbaijani | az-AZ | `azAZ` |
 | Bulgarian | bg-BG | `bgBG` |
+| Catalan | ca-ES | `caES` |
 | Chinese (Simplified) | zh-CN | `zhCN` |
 | Czech | cs-CZ | `csCZ` |
 | Dutch | nl-NL | `nlNL` |
diff --git a/packages/material-ui/src/locale/index.d.ts b/packages/material-ui/src/locale/index.d.ts
index d8769efcc16275..c6b463a057a514 100644
--- a/packages/material-ui/src/locale/index.d.ts
+++ b/packages/material-ui/src/locale/index.d.ts
@@ -1,5 +1,6 @@
 export const azAZ: object;
 export const bgBG: object;
+export const caES: object;
 export const csCZ: object;
 export const deDE: object;
 export const enUS: object;
diff --git a/packages/material-ui/src/locale/index.js b/packages/material-ui/src/locale/index.js
index 1bc9aa7d3ff368..1b097b9d8dea14 100644
--- a/packages/material-ui/src/locale/index.js
+++ b/packages/material-ui/src/locale/index.js
@@ -57,6 +57,31 @@ export const bgBG = {
   },
 };
 
+export const caES = {
+  props: {
+    MuiTablePagination: {
+      backIconButtonText: 'Pàgina anterior',
+      labelRowsPerPage: 'Files per pàgina:',
+      labelDisplayedRows: ({ from, to, count }) => `${from}-${to === -1 ? count : to} de ${count}`,
+      nextIconButtonText: 'Següent pàgina',
+    },
+    MuiRating: {
+      getLabelText: value => `${value} ${value !== 1 ? 'Estrelles' : 'Estrella'}`,
+      emptyLabelText: 'Buit',
+    },
+    MuiAutocomplete: {
+      clearText: 'Netejar',
+      closeText: 'Tancar',
+      loadingText: 'Carregant…',
+      noOptionsText: 'Sense opcions',
+      openText: 'Obert',
+    },
+    MuiAlert: {
+      closeText: 'Tancat',
+    },
+  },
+};
+
 export const csCZ = {
   props: {
     MuiTablePagination: {