diff --git a/src/providers/postgres/qgspgsourceselect.cpp b/src/providers/postgres/qgspgsourceselect.cpp
index c9f4a90a1d15..9d29bca724d9 100644
--- a/src/providers/postgres/qgspgsourceselect.cpp
+++ b/src/providers/postgres/qgspgsourceselect.cpp
@@ -61,10 +61,25 @@ QWidget *QgsPgSourceSelectDelegate::createEditor( QWidget *parent, const QStyleO
     QComboBox *cb = new QComboBox( parent );
     static const QList<QgsWkbTypes::Type> types { QgsWkbTypes::Point,
         QgsWkbTypes::LineString,
+        QgsWkbTypes::LineStringZ,
+        QgsWkbTypes::LineStringM,
+        QgsWkbTypes::LineStringZM,
         QgsWkbTypes::Polygon,
+        QgsWkbTypes::PolygonZ,
+        QgsWkbTypes::PolygonM,
+        QgsWkbTypes::PolygonZM,
         QgsWkbTypes::MultiPoint,
+        QgsWkbTypes::MultiPointZ,
+        QgsWkbTypes::MultiPointM,
+        QgsWkbTypes::MultiPointZM,
         QgsWkbTypes::MultiLineString,
+        QgsWkbTypes::MultiLineStringZ,
+        QgsWkbTypes::MultiLineStringM,
+        QgsWkbTypes::MultiLineStringZM,
         QgsWkbTypes::MultiPolygon,
+        QgsWkbTypes::MultiPolygonZ,
+        QgsWkbTypes::MultiPolygonM,
+        QgsWkbTypes::MultiPolygonZM,
         QgsWkbTypes::NoGeometry };
     for ( QgsWkbTypes::Type type : types )
     {
diff --git a/src/providers/postgres/qgspostgresconn.cpp b/src/providers/postgres/qgspostgresconn.cpp
index c9dbcb911a36..1307fa423c5c 100644
--- a/src/providers/postgres/qgspostgresconn.cpp
+++ b/src/providers/postgres/qgspostgresconn.cpp
@@ -1900,7 +1900,7 @@ void QgsPostgresConn::retrieveLayerTypes( QVector<QgsPostgresLayerProperty *> &l
       // SRID is already known
       if ( srid != std::numeric_limits<int>::min() )
       {
-        sql += QStringLiteral( "SELECT %1, array_agg( '%2:RASTER'::text )" )
+        sql += QStringLiteral( "SELECT %1, array_agg( '%2:RASTER:-1'::text )" )
                .arg( i - 1 )
                .arg( srid );
       }
@@ -1909,7 +1909,7 @@ void QgsPostgresConn::retrieveLayerTypes( QVector<QgsPostgresLayerProperty *> &l
         if ( useEstimatedMetadata )
         {
           sql = QStringLiteral( "SELECT %1, "
-                                "array_agg( srid || ':RASTER') "
+                                "array_agg( srid || ':RASTER:-1') "
                                 "FROM raster_columns "
                                 "WHERE r_raster_column = %2 AND r_table_schema = %3 AND r_table_name = %4" )
                 .arg( i - 1 )
@@ -1920,7 +1920,7 @@ void QgsPostgresConn::retrieveLayerTypes( QVector<QgsPostgresLayerProperty *> &l
         else
         {
           sql = QStringLiteral( "SELECT %1, "
-                                "array_agg( DISTINCT ST_SRID( %2 ) || ':RASTER' ) "
+                                "array_agg( DISTINCT ST_SRID( %2 ) || ':RASTER:-1' ) "
                                 "FROM %3 "
                                 "%2 IS NOT NULL "
                                 "%4 "   // SQL clause
@@ -1983,13 +1983,13 @@ void QgsPostgresConn::retrieveLayerTypes( QVector<QgsPostgresLayerProperty *> &l
         // full table. However SQL does not allow that.
         // So we have to do a subselect on the table to add the LIMIT,
         // see comment in the following code.
-        sql += QStringLiteral( "UPPER(geometrytype(%1%2))" )
+        sql += QStringLiteral( "UPPER(geometrytype(%1%2))  || ':' || ST_Zmflag(%1%2)" )
                .arg( quotedIdentifier( layerProperty.geometryColName ),
                      castToGeometry ?  "::geometry" : "" );
       }
       else
       {
-        sql += QStringLiteral( "%1::text" )
+        sql += QStringLiteral( "%1::text  || ':-1'" )
                .arg( quotedValue( QgsPostgresConn::postgisWkbTypeName( type ) ) );
       }
 
@@ -2061,9 +2061,28 @@ void QgsPostgresConn::retrieveLayerTypes( QVector<QgsPostgresLayerProperty *> &l
       if ( sridAndTypeString == "NULL" )
         continue;
 
-      QStringList sridAndType = sridAndTypeString.split( ':' );
-      int srid = sridAndType[0].toInt();
+      const QStringList sridAndType = sridAndTypeString.split( ':' );
+      Q_ASSERT( sridAndType.size() == 3 );
+      const int srid = sridAndType[0].toInt();
       QString typeString = sridAndType[1];
+      const int zmFlags = sridAndType[2].toInt();
+
+      switch ( zmFlags )
+      {
+        case 1:
+          typeString.append( 'M' );
+          break;
+        case 2:
+          typeString.append( 'Z' );
+          break;
+        case 3:
+          typeString.append( QStringLiteral( "ZM" ) );
+          break;
+        default:
+        case 0:
+        case -1:
+          break;
+      }
 
       auto type = QgsPostgresConn::wkbTypeFromPostgis( typeString );
       auto flatType = QgsWkbTypes::flatType( type );
@@ -2332,10 +2351,34 @@ QgsWkbTypes::Type QgsPostgresConn::wkbTypeFromPostgis( const QString &type )
   {
     return QgsWkbTypes::MultiPolygon;
   }
+  else if ( ( type == QLatin1String( "POLYHEDRALSURFACEZ" ) ) || ( type == QLatin1String( "TINZ" ) ) )
+  {
+    return QgsWkbTypes::MultiPolygonZ;
+  }
+  else if ( ( type == QLatin1String( "POLYHEDRALSURFACEM" ) ) || ( type == QLatin1String( "TINM" ) ) )
+  {
+    return QgsWkbTypes::MultiPolygonM;
+  }
+  else if ( ( type == QLatin1String( "POLYHEDRALSURFACEZM" ) ) || ( type == QLatin1String( "TINZM" ) ) )
+  {
+    return QgsWkbTypes::MultiPolygonZM;
+  }
   else if ( type == QLatin1String( "TRIANGLE" ) )
   {
     return QgsWkbTypes::Polygon;
   }
+  else if ( type == QLatin1String( "TRIANGLEZ" ) )
+  {
+    return QgsWkbTypes::PolygonZ;
+  }
+  else if ( type == QLatin1String( "TRIANGLEM" ) )
+  {
+    return QgsWkbTypes::PolygonM;
+  }
+  else if ( type == QLatin1String( "TRIANGLEZM" ) )
+  {
+    return QgsWkbTypes::PolygonZM;
+  }
   return QgsWkbTypes::parseType( type );
 }
 
diff --git a/tests/src/python/test_qgsproviderconnection_postgres.py b/tests/src/python/test_qgsproviderconnection_postgres.py
index a6c3d061c5b1..ed08eafe09f5 100644
--- a/tests/src/python/test_qgsproviderconnection_postgres.py
+++ b/tests/src/python/test_qgsproviderconnection_postgres.py
@@ -377,6 +377,24 @@ def test_exceptions(self):
         with self.assertRaises(QgsProviderConnectionException):
             conn.table('my_not_existent_schema', 'my_not_existent_table')
 
+    def test_zm(self):
+        """Test regression GH #43268"""
+
+        md = QgsProviderRegistry.instance().providerMetadata('postgres')
+        conn = md.createConnection(self.uri, {})
+        sql = """
+        DROP TABLE IF EXISTS qgis_test.gh_43268_test_zm;
+        CREATE TABLE qgis_test.gh_43268_test_zm (geom geometry(GeometryZ));
+        INSERT INTO qgis_test.gh_43268_test_zm (geom) VALUES
+            ('POINT(0 0 0)'),
+            ('LINESTRING(0 0 0, 0 0 0)'),
+            ('POLYGON((0 0 0, 0 0 0, 0 0 0, 0 0 0))');
+        """
+        conn.executeSql(sql)
+
+        table_info = conn.table('qgis_test', 'gh_43268_test_zm')
+        self.assertEqual(sorted([QgsWkbTypes.displayString(col.wkbType) for col in table_info.geometryColumnTypes()]), ['LineStringZ', 'PointZ', 'PolygonZ'])
+
 
 if __name__ == '__main__':
     unittest.main()