# Supported Regions and DB engines for cross-Region read replicas in Amazon RDS
Cross-Region read replicas

By using cross-Region read replicas in Amazon RDS, you can create a MariaDB, MySQL, Oracle, PostgreSQL, or SQL Server read replica in a different Region from the source DB instance. For more information about cross-Region read replicas, including source and destination Region considerations, see [Creating a read replica in a different AWS Region](USER_ReadRepl.XRgn.md).

Cross-Region read replicas are not available for the following engines:
+ RDS for Db2

**Topics**
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## Cross-Region read replicas with RDS for MariaDB
](#Concepts.RDS_Fea_Regions_DB-eng.Feature.CrossRegionReadReplicas.mdb)
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## Cross-Region read replicas with RDS for MySQL
](#Concepts.RDS_Fea_Regions_DB-eng.Feature.CrossRegionReadReplicas.my)
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## Cross-Region read replicas with RDS for Oracle
](#Concepts.RDS_Fea_Regions_DB-eng.Feature.CrossRegionReadReplicas.ora)
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## Cross-Region read replicas with RDS for PostgreSQL
](#Concepts.RDS_Fea_Regions_DB-eng.Feature.CrossRegionReadReplicas.pg)
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## Cross-Region read replicas with RDS for SQL Server
](#Concepts.RDS_Fea_Regions_DB-eng.Feature.CrossRegionReadReplicas.sq)

## Cross-Region read replicas with RDS for MariaDB


Cross-Region read replicas with RDS for MariaDB are available in all Regions for the following versions:
+ RDS for MariaDB 11.8 (All available versions)
+ RDS for MariaDB 11.4 (All available versions)
+ RDS for MariaDB 10.11 (All available versions)
+ RDS for MariaDB 10.6 (All available versions)
+ RDS for MariaDB 10.5 (All available versions)
+ RDS for MariaDB 10.4 (All available versions)

## Cross-Region read replicas with RDS for MySQL


Cross-Region read replicas with RDS for MySQL are available in all Regions for the following versions:
+ RDS for MySQL 8.4 (All available versions)
+ RDS for MySQL 8.0 (All available versions)
+ RDS for MySQL 5.7 (All available versions)

## Cross-Region read replicas with RDS for Oracle


Cross-Region read replicas for RDS for Oracle are available in all AWS Regions for all supported database versions using Enterprise Edition. Replicas are supported only in non-CDBs and in the single-tenant configuration of the CDB architecture. Cross-Region read replicas aren't supported in the multi-tenant configuration of the CDB architecture. 

For more information on additional requirements for cross-Region read replicas with RDS for Oracle, see [Requirements and considerations for RDS for Oracle replicas](oracle-read-replicas.limitations.md). 

## Cross-Region read replicas with RDS for PostgreSQL


Cross-Region read replicas with RDS for PostgreSQL are available in all Regions for the following versions:
+ RDS for PostgreSQL 18 (All available versions)
+ RDS for PostgreSQL 17 (All available versions)
+ RDS for PostgreSQL 16 (All available versions)
+ RDS for PostgreSQL 15 (All available versions)
+ RDS for PostgreSQL 14 (All available versions)
+ RDS for PostgreSQL 13 (All available versions)
+ RDS for PostgreSQL 12 (All available versions)
+ RDS for PostgreSQL 11 (All available versions)
+ RDS for PostgreSQL 10 (All available versions)

## Cross-Region read replicas with RDS for SQL Server


Cross-Region read replicas with RDS for SQL Server are available in all Regions for the following versions using Microsoft SQL Server Enterprise Edition:
+ RDS for SQL Server 2022
+ RDS for SQL Server 2019 (Version 15.00.4073.23 and higher)
+ RDS for SQL Server 2017 (Version 14.00.3281.6 and higher)
+ RDS for SQL Server 2016 (Version 13.00.6300.2 and higher)