diff --git a/chromeos/lacros/BUILD.gn b/chromeos/lacros/BUILD.gn
index cb3e3c0da0e717..0c7688bdb42867 100644
--- a/chromeos/lacros/BUILD.gn
+++ b/chromeos/lacros/BUILD.gn
@@ -24,6 +24,7 @@ component("lacros") {
     "//chromeos/crosapi/mojom",
     "//chromeos/process_proxy",
     "//chromeos/startup",
+    "//components/crash/core/common",
     "//mojo/public/cpp/bindings",
     "//ui/native_theme",
   ]
diff --git a/chromeos/lacros/DEPS b/chromeos/lacros/DEPS
index c18b1107945809..a01f22574fda5d 100644
--- a/chromeos/lacros/DEPS
+++ b/chromeos/lacros/DEPS
@@ -6,4 +6,5 @@ include_rules = [
   "-content",
 
   "+ui/native_theme",
+  "+components/crash/core/common",
 ]
diff --git a/chromeos/lacros/lacros_service.cc b/chromeos/lacros/lacros_service.cc
index 62cfd3e1fc680b..25934b472cade5 100644
--- a/chromeos/lacros/lacros_service.cc
+++ b/chromeos/lacros/lacros_service.cc
@@ -73,6 +73,7 @@
 #include "chromeos/lacros/system_idle_cache.h"
 #include "chromeos/services/machine_learning/public/mojom/machine_learning_service.mojom.h"
 #include "chromeos/startup/startup.h"
+#include "components/crash/core/common/crash_key.h"
 #include "mojo/public/cpp/bindings/pending_receiver.h"
 #include "mojo/public/cpp/platform/platform_channel.h"
 #include "mojo/public/cpp/system/invitation.h"
@@ -112,6 +113,25 @@ crosapi::mojom::BrowserInitParamsPtr ReadStartupBrowserInitParams() {
   return result;
 }
 
+std::string SessionTypeToString(crosapi::mojom::SessionType session_type) {
+  switch (session_type) {
+    case crosapi::mojom::SessionType::kUnknown:
+      return "unknown";
+    case crosapi::mojom::SessionType::kRegularSession:
+      return "regular";
+    case crosapi::mojom::SessionType::kGuestSession:
+      return "guest";
+    case crosapi::mojom::SessionType::kPublicSession:
+      return "managed-guest-session";
+    case crosapi::mojom::SessionType::kWebKioskSession:
+      return "web-kiosk";
+    case crosapi::mojom::SessionType::kChildSession:
+      return "child";
+    case crosapi::mojom::SessionType::kAppKioskSession:
+      return "chrome-app-kiosk";
+  }
+}
+
 }  // namespace
 
 LacrosService::InterfaceEntryBase::InterfaceEntryBase() = default;
@@ -188,6 +208,9 @@ LacrosService::LacrosService()
                                   weak_factory_.GetWeakPtr()));
   }
 
+  static crash_reporter::CrashKeyString<32> session_type("session-type");
+  session_type.Set(SessionTypeToString(init_params_->session_type));
+
   // Short term workaround: if --crosapi-mojo-platform-channel-handle is
   // available, close --mojo-platform-channel-handle, and remove it
   // from command line. It is for backward compatibility support by
diff --git a/components/user_manager/BUILD.gn b/components/user_manager/BUILD.gn
index 753deb22bcbf6b..ca29d10473c1aa 100644
--- a/components/user_manager/BUILD.gn
+++ b/components/user_manager/BUILD.gn
@@ -22,7 +22,10 @@ component("user_manager") {
     "//ui/gfx",
   ]
 
-  deps = [ "//google_apis" ]
+  deps = [
+    "//components/crash/core/common",
+    "//google_apis",
+  ]
 
   defines = [ "USER_MANAGER_IMPLEMENTATION" ]
 
diff --git a/components/user_manager/DEPS b/components/user_manager/DEPS
index 69439615e65ffb..56878b9d8c9dd6 100644
--- a/components/user_manager/DEPS
+++ b/components/user_manager/DEPS
@@ -2,6 +2,7 @@ include_rules = [
   "+ash/constants",
   "+components/account_id/account_id.h",
   "+components/prefs",
+  "+components/crash/core/common",
   "+google_apis/gaia/gaia_auth_util.h",
   "+third_party/skia/include",
   "+ui/gfx/codec",
diff --git a/components/user_manager/user_manager_base.cc b/components/user_manager/user_manager_base.cc
index 97cc30e14ce108..1aeed9fb62f7aa 100644
--- a/components/user_manager/user_manager_base.cc
+++ b/components/user_manager/user_manager_base.cc
@@ -22,6 +22,7 @@
 #include "base/strings/utf_string_conversions.h"
 #include "base/task/single_thread_task_runner.h"
 #include "base/values.h"
+#include "components/crash/core/common/crash_key.h"
 #include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/pref_service.h"
 #include "components/prefs/scoped_user_pref_update.h"
@@ -86,6 +87,30 @@ UserType GetStoredUserType(const base::Value* prefs_user_types,
   return static_cast<UserType>(int_user_type);
 }
 
+std::string UserTypeToString(UserType user_type) {
+  switch (user_type) {
+    case USER_TYPE_REGULAR:
+      return "regular";
+    case USER_TYPE_CHILD:
+      return "child";
+    case USER_TYPE_GUEST:
+      return "guest";
+    case USER_TYPE_PUBLIC_ACCOUNT:
+      return "managed-guest-session";
+    case USER_TYPE_KIOSK_APP:
+      return "chrome-app-kiosk";
+    case USER_TYPE_ARC_KIOSK_APP:
+      return "arc-kiosk";
+    case USER_TYPE_WEB_KIOSK_APP:
+      return "web-kiosk";
+    case USER_TYPE_ACTIVE_DIRECTORY:
+      return "active-directory";
+    case NUM_USER_TYPES:
+      NOTREACHED();
+      return "";
+  }
+}
+
 }  // namespace
 
 // static
@@ -235,6 +260,9 @@ void UserManagerBase::UserLoggedIn(const AccountId& account_id,
   UMA_HISTOGRAM_ENUMERATION(
       "UserManager.LoginUserType", active_user_->GetType(), NUM_USER_TYPES);
 
+  static crash_reporter::CrashKeyString<32> session_type("session-type");
+  session_type.Set(UserTypeToString(active_user_->GetType()));
+
   GetLocalState()->SetString(
       kLastLoggedInGaiaUser,
       active_user_->HasGaiaAccount() ? account_id.GetUserEmail() : "");