diff --git a/docs/src/pages/guides/localization/localization.md b/docs/src/pages/guides/localization/localization.md
index bb060161f69277..c315e5baca38d0 100644
--- a/docs/src/pages/guides/localization/localization.md
+++ b/docs/src/pages/guides/localization/localization.md
@@ -34,6 +34,7 @@ const theme = createMuiTheme({
 | Czech | cs-CZ | `csCZ` |
 | Dutch | nl-NL | `nlNL` |
 | English (United States) | en-US | `enUS` |
+| Finnish | fi-FI | `fiFI` |
 | French | fr-FR | `frFR` |
 | German | de-DE |  `deDE` |
 | Indonesian | id-ID | `idID` |
diff --git a/packages/material-ui/src/locale/index.d.ts b/packages/material-ui/src/locale/index.d.ts
index b10dfb4801dd44..1507fe341a92c7 100644
--- a/packages/material-ui/src/locale/index.d.ts
+++ b/packages/material-ui/src/locale/index.d.ts
@@ -6,6 +6,7 @@ export const deDE: object;
 export const enUS: object;
 export const esES: object;
 export const faIR: object;
+export const fiFI: object;
 export const frFR: object;
 export const idID: object;
 export const itIT: object;
diff --git a/packages/material-ui/src/locale/index.js b/packages/material-ui/src/locale/index.js
index d5e1c64785ab23..5e1d9a54ff8bd6 100644
--- a/packages/material-ui/src/locale/index.js
+++ b/packages/material-ui/src/locale/index.js
@@ -218,6 +218,31 @@ export const faIR = {
   },
 };
 
+export const fiFI = {
+  props: {
+    MuiTablePagination: {
+      backIconButtonText: 'Edellinen sivu',
+      labelRowsPerPage: 'Rivejä per sivu:',
+      labelDisplayedRows: ({ from, to, count }) => `${from}-${to === -1 ? count : to} / ${count}`,
+      nextIconButtonText: 'Seuraava sivu',
+    },
+    MuiRating: {
+      getLabelText: value => `${value} Täht${value !== 1 ? 'eä' : 'i'}`,
+      emptyLabelText: 'Tyhjä',
+    },
+    MuiAutocomplete: {
+      clearText: 'Tyhjennä',
+      closeText: 'Sulje',
+      loadingText: 'Ladataan…',
+      noOptionsText: 'Ei valintoja',
+      openText: 'Avaa',
+    },
+    MuiAlert: {
+      closeText: 'Sulje',
+    },
+  },
+};
+
 export const frFR = {
   props: {
     MuiTablePagination: {