diff --git a/.changelog/36803.txt b/.changelog/36803.txt
new file mode 100644
index 000000000000..d27121bec4b1
--- /dev/null
+++ b/.changelog/36803.txt
@@ -0,0 +1,3 @@
+```release-note:enhancement
+data-source/aws_sagemaker_prebuilt_ecr_image: Add `registry_id` for `af-south-1` AWS Region
+```
\ No newline at end of file
diff --git a/internal/service/sagemaker/prebuilt_ecr_image_data_source.go b/internal/service/sagemaker/prebuilt_ecr_image_data_source.go
index 3fd33001763d..072764e310c4 100644
--- a/internal/service/sagemaker/prebuilt_ecr_image_data_source.go
+++ b/internal/service/sagemaker/prebuilt_ecr_image_data_source.go
@@ -260,6 +260,7 @@ var PrebuiltECRImageIDByRegion_sparkML = map[string]string{
 // https://github.com/aws/sagemaker-tensorflow-serving-container
 
 var prebuiltECRImageIDByRegion_deepLearning = map[string]string{
+	endpoints.AfSouth1RegionID:     "626614931356",
 	endpoints.ApEast1RegionID:      "871362719292",
 	endpoints.ApNortheast1RegionID: "763104351884",
 	endpoints.ApNortheast2RegionID: "763104351884",