diff --git a/.changesets/statsd-port-config-option.md b/.changesets/statsd-port-config-option.md
new file mode 100644
index 000000000..9694ecc08
--- /dev/null
+++ b/.changesets/statsd-port-config-option.md
@@ -0,0 +1,6 @@
+---
+bump: "patch"
+type: "add"
+---
+
+Allow configuration of the agent's StatsD server port through the `statsd_port` option.
diff --git a/lib/appsignal/config.rb b/lib/appsignal/config.rb
index 8d91e93b8..c889b049d 100644
--- a/lib/appsignal/config.rb
+++ b/lib/appsignal/config.rb
@@ -100,6 +100,7 @@ class Config
       "APPSIGNAL_SEND_PARAMS" => :send_params,
       "APPSIGNAL_SEND_SESSION_DATA" => :send_session_data,
       "APPSIGNAL_SKIP_SESSION_DATA" => :skip_session_data,
+      "APPSIGNAL_STATSD_PORT" => :statsd_port,
       "APPSIGNAL_TRANSACTION_DEBUG_MODE" => :transaction_debug_mode,
       "APPSIGNAL_WORKING_DIRECTORY_PATH" => :working_directory_path,
       "APPSIGNAL_WORKING_DIR_PATH" => :working_dir_path,
@@ -117,6 +118,7 @@ class Config
       APPSIGNAL_LOGGING_ENDPOINT
       APPSIGNAL_PUSH_API_ENDPOINT
       APPSIGNAL_PUSH_API_KEY
+      APPSIGNAL_STATSD_PORT
       APPSIGNAL_WORKING_DIRECTORY_PATH
       APPSIGNAL_WORKING_DIR_PATH
       APP_REVISION
@@ -343,6 +345,7 @@ def write_to_environment # rubocop:disable Metrics/AbcSize
       ENV["_APPSIGNAL_PUSH_API_KEY"]                 = config_hash[:push_api_key]
       ENV["_APPSIGNAL_RUNNING_IN_CONTAINER"]         = config_hash[:running_in_container].to_s
       ENV["_APPSIGNAL_SEND_ENVIRONMENT_METADATA"]    = config_hash[:send_environment_metadata].to_s
+      ENV["_APPSIGNAL_STATSD_PORT"]                  = config_hash[:statsd_port].to_s
       ENV["_APPSIGNAL_TRANSACTION_DEBUG_MODE"]       = config_hash[:transaction_debug_mode].to_s
       if config_hash[:working_directory_path]
         ENV["_APPSIGNAL_WORKING_DIRECTORY_PATH"] = config_hash[:working_directory_path]
diff --git a/lib/puma/plugin/appsignal.rb b/lib/puma/plugin/appsignal.rb
index 275b057c3..8463faaff 100644
--- a/lib/puma/plugin/appsignal.rb
+++ b/lib/puma/plugin/appsignal.rb
@@ -140,7 +140,7 @@ class Statsd
     def initialize
       # StatsD server location as configured in AppSignal agent StatsD server.
       @host = "127.0.0.1"
-      @port = 8125
+      @port = ENV.fetch("APPSIGNAL_STATSD_PORT", 8125)
     end
 
     def gauge(metric_name, value, tags)
diff --git a/spec/lib/appsignal/config_spec.rb b/spec/lib/appsignal/config_spec.rb
index e8e56624b..e3f94fe08 100644
--- a/spec/lib/appsignal/config_spec.rb
+++ b/spec/lib/appsignal/config_spec.rb
@@ -643,6 +643,7 @@
       expect(ENV.fetch("_APPSIGNAL_FILES_WORLD_ACCESSIBLE", nil)).to eq "true"
       expect(ENV.fetch("_APPSIGNAL_TRANSACTION_DEBUG_MODE", nil)).to eq "true"
       expect(ENV.fetch("_APPSIGNAL_SEND_ENVIRONMENT_METADATA", nil)).to eq "false"
+      expect(ENV.fetch("_APPSIGNAL_STATSD_PORT", nil)).to eq ""
       expect(ENV.fetch("_APPSIGNAL_FILTER_PARAMETERS", nil)).to eq "password,confirm_password"
       expect(ENV.fetch("_APPSIGNAL_FILTER_SESSION_DATA", nil)).to eq "key1,key2"
       expect(ENV.fetch("_APP_REVISION", nil)).to eq "v2.5.1"
@@ -682,6 +683,17 @@
         expect(ENV.fetch("_APPSIGNAL_WORKING_DIRECTORY_PATH", nil)).to eq "/tmp/appsignal2"
       end
     end
+
+    context "with :statsd_port" do
+      before do
+        config[:statsd_port] = "1000"
+        config.write_to_environment
+      end
+
+      it "sets the statsd_port env var" do
+        expect(ENV.fetch("_APPSIGNAL_STATSD_PORT", nil)).to eq "1000"
+      end
+    end
   end
 
   describe "#log_file_path" do