diff --git a/master_changes.md b/master_changes.md
index f8ed5aa796d..e6c8144cdf0 100644
--- a/master_changes.md
+++ b/master_changes.md
@@ -22,6 +22,7 @@ users)
 ## Init
 
 ## Config report
+  * add the list of all installed repositories to a new all-repositories field [#5799 @kit-ty-kate]
 
 ## Actions
 
diff --git a/src/client/opamCommands.ml b/src/client/opamCommands.ml
index dc72f544ff3..b9a4c9d81e1 100644
--- a/src/client/opamCommands.ml
+++ b/src/client/opamCommands.ml
@@ -1487,12 +1487,9 @@ let config cli =
             if n <> 0 then [Printf.sprintf "%d (%s)" n label]
             else [] in
           print "jobs" "%d" (Lazy.force OpamStateConfig.(!r.jobs));
-          match OpamStateConfig.get_switch_opt () with
-          | None -> print "current-switch" "%s" "none set"; `Ok ()
-          | Some switch ->
-            OpamSwitchState.with_ `Lock_none ~switch gt @@ fun state ->
-            print "repositories" "%s"
-              (let repos = state.switch_repos.repositories in
+          let print_repositories name rt =
+            print name "%s"
+              (let repos = rt.repositories in
                let default, nhttp, nlocal, nvcs =
                  OpamRepositoryName.Map.fold
                    (fun _ repo (dft, nhttp, nlocal, nvcs) ->
@@ -1502,7 +1499,7 @@ let config cli =
                         then
                           OpamRepositoryName.Map.find
                             repo.repo_name
-                            state.switch_repos.repos_definitions |>
+                            rt.repos_definitions |>
                           OpamFile.Repo.stamp
                         else dft
                       in
@@ -1520,6 +1517,14 @@ let config cli =
                | Some v -> Printf.sprintf " (default repo at %s)" v
                | None -> ""
               );
+          in
+          OpamRepositoryState.with_ `Lock_none gt @@ fun rt ->
+          print_repositories "all-repositories" rt;
+          match OpamStateConfig.get_switch_opt () with
+          | None -> print "current-switch" "%s" "none set"; `Ok ()
+          | Some switch ->
+            OpamSwitchState.with_ `Lock_none ~switch gt @@ fun state ->
+            print_repositories "repositories" state.switch_repos;
             print "pinned" "%s"
               (if OpamPackage.Set.is_empty state.pinned then "0" else
                let pinnings =
diff --git a/tests/reftests/config.test b/tests/reftests/config.test
index 551a4be305c..4148b5e1308 100644
--- a/tests/reftests/config.test
+++ b/tests/reftests/config.test
@@ -38,6 +38,7 @@ Set to '"-removed"' the field solver-upgrade-criteria in global configuration
 # install-criteria     -removed
 # upgrade-criteria     -removed
 # jobs                 1
+# all-repositories     1 (local)
 # current-switch       none set
 ### # empty switch
 ### opam switch create an-empty-switch --empty
@@ -50,6 +51,7 @@ Set to '"-removed"' the field solver-upgrade-criteria in global configuration
 # install-criteria     -removed
 # upgrade-criteria     -removed
 # jobs                 1
+# all-repositories     1 (local)
 # repositories         1 (local)
 # pinned               0
 # current-switch       an-empty-switch
@@ -120,6 +122,7 @@ Done.
 # install-criteria     -removed
 # upgrade-criteria     -removed
 # jobs                 1
+# all-repositories     2 (local)
 # repositories         2 (local)
 # pinned               1 (rsync)
 # current-switch       a-switch
@@ -152,6 +155,7 @@ Done.
 # install-criteria     -removed
 # upgrade-criteria     -removed
 # jobs                 1
+# all-repositories     1 (local)
 # repositories         1 (local)
 # pinned               0
 # current-switch       an-empty-invariant-with-compiler
@@ -180,6 +184,7 @@ Done.
 # install-criteria     -removed
 # upgrade-criteria     -removed
 # jobs                 1
+# all-repositories     1 (local)
 # repositories         1 (local)
 # pinned               0
 # current-switch       a-package-invariant
@@ -208,6 +213,7 @@ Done.
 # install-criteria     -removed
 # upgrade-criteria     -removed
 # jobs                 1
+# all-repositories     1 (local)
 # repositories         1 (local)
 # pinned               0
 # current-switch       a-compiler-with-depopt