diff --git a/build/communes.js b/build/communes.js
index fe48bae..0dad964 100644
--- a/build/communes.js
+++ b/build/communes.js
@@ -15,6 +15,7 @@ const MORTES_POUR_LA_FRANCE = ['55189', '55039', '55050', '55239', '55307', '551
 async function buildCommunes() {
   const communesFeatures = await readGeoJSONFeatures(COMMUNES_FEATURES_PATH)
   const communesFeaturesIndex = keyBy(communesFeatures, f => f.properties.code)
+  const keyCom = 'collectiviteOutremer'
 
   const communesData = communes
     .filter(commune => {
@@ -30,6 +31,9 @@ async function buildCommunes() {
         codesPostaux: commune.codesPostaux || [],
         population: commune.population
       }
+      if (keyCom in commune) {
+        communeData[keyCom] = commune[keyCom]
+      }
 
       if (commune.code in communesFeaturesIndex) {
         const contour = communesFeaturesIndex[commune.code].geometry
diff --git a/lib/communeHelpers.js b/lib/communeHelpers.js
index 6dd09df..c845045 100644
--- a/lib/communeHelpers.js
+++ b/lib/communeHelpers.js
@@ -1,7 +1,7 @@
 const {initFields, initFormat} = require('./helpers')
 
 const initCommuneFields = initFields({
-  default: ['nom', 'code', 'codeDepartement', 'codeRegion', 'codesPostaux', 'population'],
+  default: ['nom', 'code', 'codeDepartement', 'codeRegion', 'codesPostaux', 'population', 'collectiviteOutremer'],
   base: ['nom', 'code']
 })
 
diff --git a/lib/communes.js b/lib/communes.js
index 907b611..f85ec88 100644
--- a/lib/communes.js
+++ b/lib/communes.js
@@ -19,6 +19,11 @@ const schema = {
   code: {type: 'token', queryWith: 'code'},
   codesPostaux: {type: 'tokenList', queryWith: 'codePostal'},
   codeDepartement: {type: 'token', queryWith: 'codeDepartement'},
+  collectiviteOutremer: {
+    type: 'tokenNested',
+    queryWith: 'collectiviteOutremer',
+    nestedKey: 'code'
+  },
   codeRegion: {type: 'token', queryWith: 'codeRegion'},
   contour: {type: 'geo', queryWith: 'pointInContour'}
 }
diff --git a/lib/searchableCollection/index.js b/lib/searchableCollection/index.js
index 6f4217b..756a3f4 100644
--- a/lib/searchableCollection/index.js
+++ b/lib/searchableCollection/index.js
@@ -6,6 +6,7 @@ const TextIndex = require('./indexes/text')
 const createIndexByType = {
   token: (key, params) => new TokenIndex(key, params),
   tokenList: (key, params) => new TokenIndex(key, {...params, array: true}),
+  tokenNested: (key, params) => new TokenIndex(key, params),
   text: (key, params) => new TextIndex(key, params),
   geo: key => new GeoIndex(key)
 }
diff --git a/lib/searchableCollection/indexes/token.js b/lib/searchableCollection/indexes/token.js
index 0e95e35..d62d32a 100644
--- a/lib/searchableCollection/indexes/token.js
+++ b/lib/searchableCollection/indexes/token.js
@@ -8,6 +8,7 @@ class TokenIndex {
 
     this._key = key
     this._array = options.array || false
+    this._nestedKey = options.nestedKey || false
     this._multiple = options.multiple
     this._index = new Map()
   }
@@ -24,6 +25,8 @@ class TokenIndex {
     if (this._key in item) {
       if (this._array) {
         item[this._key].forEach(token => this.indexForToken(token, item))
+      } else if (this._nestedKey) {
+        this.indexForToken(item[this._key][this._nestedKey], item)
       } else {
         this.indexForToken(item[this._key], item)
       }
diff --git a/server.js b/server.js
index 1e4c131..3cc3c02 100644
--- a/server.js
+++ b/server.js
@@ -29,7 +29,7 @@ app.use((req, res, next) => {
 
 /* Communes */
 app.get('/communes', initLimit(), initCommuneFields, initCommuneFormat, (req, res) => {
-  const query = pick(req.query, 'type', 'code', 'codePostal', 'nom', 'codeDepartement', 'codeRegion', 'boost')
+  const query = pick(req.query, 'type', 'code', 'codePostal', 'nom', 'collectiviteOutremer', 'codeDepartement', 'codeRegion', 'boost')
   if (req.query.lat && req.query.lon) {
     const lat = parseFloat(req.query.lat)
     const lon = parseFloat(req.query.lon)
diff --git a/test/communeHelpers.js b/test/communeHelpers.js
index c381606..07fabd4 100644
--- a/test/communeHelpers.js
+++ b/test/communeHelpers.js
@@ -17,7 +17,7 @@ describe('communeHelpers', () => {
     it('empty request should return default fields', done => {
       runTestCase(
         {},
-        ['nom', 'code', 'codesPostaux', 'codeDepartement', 'codeRegion', 'population'],
+        ['nom', 'code', 'codeDepartement', 'codeRegion', 'codesPostaux', 'population', 'collectiviteOutremer'],
         done
       )
     })