diff --git a/.changes/next-release/deprecation-ApacheHTTPClient-43c0545.json b/.changes/next-release/deprecation-ApacheHTTPClient-43c0545.json
new file mode 100644
index 000000000000..59ba3bc4ebfa
--- /dev/null
+++ b/.changes/next-release/deprecation-ApacheHTTPClient-43c0545.json
@@ -0,0 +1,6 @@
+{
+    "type": "deprecation",
+    "category": "Apache HTTP Client",
+    "contributor": "",
+    "description": "`apache-client` is now deprecated in favor of `apache5-client`. [Apache HttpClient 4.x](https://hc.apache.org/status.html) is in maintenance mode, receiving fixes only for major defects and security issues."
+}
diff --git a/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ApacheHttpClient.java b/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ApacheHttpClient.java
index 6013c07bdaa8..04c1076176c8 100644
--- a/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ApacheHttpClient.java
+++ b/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ApacheHttpClient.java
@@ -101,8 +101,13 @@
  * <p>See software.amazon.awssdk.http.urlconnection.UrlConnectionHttpClient for an alternative implementation.</p>
  *
  * <p>This can be created via {@link #builder()}</p>
+ *
+ * @deprecated Apache 4.x is in maintenance mode. Users are encouraged to switch to the
+ * <a href="https://docs.aws.amazon.com/java/api/latest/software/amazon/awssdk/http/apache5/Apache5HttpClient.html">Apache 5 HTTP Client</a>
+ * which is feature compatible with this client.
  */
 @SdkPublicApi
+@Deprecated
 public final class ApacheHttpClient implements SdkHttpClient {
 
     public static final String CLIENT_NAME = "Apache";
@@ -345,6 +350,9 @@ public String clientName() {
      *                     .socketTimeout(Duration.ofSeconds(10))
      *                     .build();
      * </pre>
+     * @deprecated Apache 4.x is in maintenance mode. Users are encouraged to switch to the
+     * <a href="https://docs.aws.amazon.com/java/api/latest/software/amazon/awssdk/http/apache5/Apache5HttpClient.html">Apache 5 HTTP Client</a>
+     * which is feature compatible with this client.
      */
     public interface Builder extends SdkHttpClient.Builder<ApacheHttpClient.Builder> {
 
diff --git a/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ApacheSdkHttpService.java b/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ApacheSdkHttpService.java
index 8ada6d4fc835..f9605120f244 100644
--- a/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ApacheSdkHttpService.java
+++ b/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ApacheSdkHttpService.java
@@ -21,8 +21,13 @@
 
 /**
  * Service binding for the Apache implementation.
+ *
+ * @deprecated Apache 4.x is in maintenance mode. Users are encouraged to switch to the
+ * <a href="https://docs.aws.amazon.com/java/api/latest/software/amazon/awssdk/http/apache5/Apache5HttpClient.html">Apache 5 HTTP Client</a>
+ * which is feature compatible with this client.
  */
 @SdkPublicApi
+@Deprecated
 public class ApacheSdkHttpService implements SdkHttpService {
     @Override
     public SdkHttpClient.Builder createHttpClientBuilder() {
diff --git a/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ProxyConfiguration.java b/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ProxyConfiguration.java
index a73dfb74e5df..ab83d254d3fe 100644
--- a/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ProxyConfiguration.java
+++ b/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ProxyConfiguration.java
@@ -32,8 +32,13 @@
 
 /**
  * Configuration that defines how to communicate via an HTTP or HTTPS proxy.
+ *
+ * @deprecated Apache 4.x is in maintenance mode. Users are encouraged to switch to the
+ * <a href="https://docs.aws.amazon.com/java/api/latest/software/amazon/awssdk/http/apache5/Apache5HttpClient.html">Apache 5 HTTP Client</a>
+ * which is feature compatible with this client.
  */
 @SdkPublicApi
+@Deprecated
 public final class ProxyConfiguration implements ToCopyableBuilder<ProxyConfiguration.Builder, ProxyConfiguration> {
     private final URI endpoint;
     private final String username;