diff --git a/doc/admin/event-logging-formats.en.rst b/doc/admin/event-logging-formats.en.rst
index 31ab2a1c641..4e70b4389c0 100644
--- a/doc/admin/event-logging-formats.en.rst
+++ b/doc/admin/event-logging-formats.en.rst
@@ -511,6 +511,13 @@ The following list describes Traffic Server custom logging fields.
 ``sts``
     The time Traffic Server spends accessing the origin, in seconds.
 
+.. _sstc:
+
+``sstc``
+    The number of transactions between Traffic Server and the origin server
+    from a single server session. A value greater than 0 indicates connection
+    reuse.
+
 .. _ttms:
 
 ``ttms``
diff --git a/proxy/http/HttpSM.cc b/proxy/http/HttpSM.cc
index df369d8e0fb..f80ebdcc5fa 100644
--- a/proxy/http/HttpSM.cc
+++ b/proxy/http/HttpSM.cc
@@ -278,8 +278,9 @@ HttpSM::HttpSM()
     server_response_hdr_bytes(0), server_response_body_bytes(0), client_response_hdr_bytes(0), client_response_body_bytes(0),
     cache_response_hdr_bytes(0), cache_response_body_bytes(0), pushed_response_hdr_bytes(0), pushed_response_body_bytes(0),
     client_tcp_reused(false), client_ssl_reused(false), client_connection_is_ssl(false), client_sec_protocol("-"),
-    client_cipher_suite("-"), plugin_tag(0), plugin_id(0), hooks_set(false), cur_hook_id(TS_HTTP_LAST_HOOK), cur_hook(NULL),
-    cur_hooks(0), callout_state(HTTP_API_NO_CALLOUT), terminate_sm(false), kill_this_async_done(false), parse_range_done(false)
+    client_cipher_suite("-"), server_transact_count(0), plugin_tag(0), plugin_id(0), hooks_set(false), cur_hook_id(TS_HTTP_LAST_HOOK), 
+    cur_hook(NULL), cur_hooks(0), callout_state(HTTP_API_NO_CALLOUT), terminate_sm(false), kill_this_async_done(false), 
+    parse_range_done(false)
 {
   memset(&history, 0, sizeof(history));
   memset(&vc_table, 0, sizeof(vc_table));
@@ -5609,7 +5610,7 @@ HttpSM::attach_server_session(HttpServerSession *s)
   hsm_release_assert(server_entry == NULL);
   hsm_release_assert(s->state == HSS_ACTIVE);
   server_session = s;
-  server_session->transact_count++;
+  server_transact_count = server_session->transact_count++;
 
   // Set the mutex so that we have something to update
   //   stats with
diff --git a/proxy/http/HttpSM.h b/proxy/http/HttpSM.h
index 605341d71ae..c374905dd8a 100644
--- a/proxy/http/HttpSM.h
+++ b/proxy/http/HttpSM.h
@@ -499,6 +499,7 @@ class HttpSM : public Continuation
   bool client_connection_is_ssl;
   const char *client_sec_protocol;
   const char *client_cipher_suite;
+  int server_transact_count;
 
   TransactionMilestones milestones;
   ink_hrtime api_timer;
diff --git a/proxy/logging/Log.cc b/proxy/logging/Log.cc
index cad013e90c9..d2c7694ed61 100644
--- a/proxy/logging/Log.cc
+++ b/proxy/logging/Log.cc
@@ -705,6 +705,11 @@ Log::init_fields()
   global_field_list.add(field, false);
   ink_hash_table_insert(field_symbol_hash, "sts", field);
 
+  field = new LogField("server_transact_count", "sstc", LogField::sINT, &LogAccess::marshal_server_transact_count,
+                       &LogAccess::unmarshal_int_to_str);
+  global_field_list.add(field, false);
+  ink_hash_table_insert(field_symbol_hash, "sstc", field);
+
   field = new LogField("cached_resp_status_code", "csssc", LogField::sINT, &LogAccess::marshal_cache_resp_status_code,
                        &LogAccess::unmarshal_http_status);
   global_field_list.add(field, false);
diff --git a/proxy/logging/LogAccess.cc b/proxy/logging/LogAccess.cc
index 8264c47c8fa..a671a596a1e 100644
--- a/proxy/logging/LogAccess.cc
+++ b/proxy/logging/LogAccess.cc
@@ -541,6 +541,13 @@ LogAccess::marshal_server_resp_time_s(char *buf)
   DEFAULT_INT_FIELD;
 }
 
+/*-------------------------------------------------------------------------
+-------------------------------------------------------------------------*/
+int
+LogAccess::marshal_server_transact_count(char *buf)
+{
+  DEFAULT_INT_FIELD;
+}
 
 /*-------------------------------------------------------------------------
   -------------------------------------------------------------------------*/
diff --git a/proxy/logging/LogAccess.h b/proxy/logging/LogAccess.h
index 45459c6684f..8eabc73cb0d 100644
--- a/proxy/logging/LogAccess.h
+++ b/proxy/logging/LogAccess.h
@@ -232,6 +232,7 @@ class LogAccess
   inkcoreapi virtual int marshal_server_resp_http_version(char *); // INT
   inkcoreapi virtual int marshal_server_resp_time_ms(char *);      // INT
   inkcoreapi virtual int marshal_server_resp_time_s(char *);       // INT
+  inkcoreapi virtual int marshal_server_transact_count(char *);    // INT
 
   //
   // cache -> client fields
diff --git a/proxy/logging/LogAccessHttp.cc b/proxy/logging/LogAccessHttp.cc
index ba8b7dec542..711df25740b 100644
--- a/proxy/logging/LogAccessHttp.cc
+++ b/proxy/logging/LogAccessHttp.cc
@@ -1096,6 +1096,20 @@ LogAccessHttp::marshal_server_resp_time_s(char *buf)
   return INK_MIN_ALIGN;
 }
 
+/*-------------------------------------------------------------------------
+  -------------------------------------------------------------------------*/
+
+int
+LogAccessHttp::marshal_server_transact_count(char *buf)
+{
+  if (buf) {
+    int64_t count;
+    count = m_http_sm->server_transact_count;
+    marshal_int(buf, count);
+  }
+  return INK_MIN_ALIGN;
+}
+
 /*-------------------------------------------------------------------------
   -------------------------------------------------------------------------*/
 
diff --git a/proxy/logging/LogAccessHttp.h b/proxy/logging/LogAccessHttp.h
index 20a4ea6d205..9ce0e71ef69 100644
--- a/proxy/logging/LogAccessHttp.h
+++ b/proxy/logging/LogAccessHttp.h
@@ -113,6 +113,7 @@ class LogAccessHttp : public LogAccess
   virtual int marshal_server_resp_http_version(char *); // INT
   virtual int marshal_server_resp_time_ms(char *);      // INT
   virtual int marshal_server_resp_time_s(char *);       // INT
+  virtual int marshal_server_transact_count(char *);    // INT
 
   //
   // cache -> client fields