diff --git a/Documentation/config/rebase.txt b/Documentation/config/rebase.txt
index f19bd0e040..afaf6dad99 100644
--- a/Documentation/config/rebase.txt
+++ b/Documentation/config/rebase.txt
@@ -67,3 +67,13 @@ rebase.rescheduleFailedExec::
 
 rebase.forkPoint::
 	If set to false set `--no-fork-point` option by default.
+
+rebase.rebaseMerges::
+	Whether and how to set the `--rebase-merges` option by default. Can
+	be `rebase-cousins`, `no-rebase-cousins`, or a boolean. Setting to
+	true or to `no-rebase-cousins` is equivalent to
+	`--rebase-merges=no-rebase-cousins`, setting to `rebase-cousins` is
+	equivalent to `--rebase-merges=rebase-cousins`, and setting to false is
+	equivalent to `--no-rebase-merges`. Passing `--rebase-merges` on the
+	command line, with or without an argument, overrides any
+	`rebase.rebaseMerges` configuration.
diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
index 4e57a87624..e7b39ad244 100644
--- a/Documentation/git-rebase.txt
+++ b/Documentation/git-rebase.txt
@@ -537,7 +537,8 @@ See also INCOMPATIBLE OPTIONS below.
 	by recreating the merge commits. Any resolved merge conflicts or
 	manual amendments in these merge commits will have to be
 	resolved/re-applied manually. `--no-rebase-merges` can be used to
-	countermand a previous `--rebase-merges`.
+	countermand both the `rebase.rebaseMerges` config option and a previous
+	`--rebase-merges`.
 +
 When rebasing merges, there are two modes: `rebase-cousins` and
 `no-rebase-cousins`. If the mode is not specified, it defaults to
diff --git a/builtin/rebase.c b/builtin/rebase.c
index 4b3f29a449..1e8419d505 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -124,6 +124,7 @@ struct rebase_options {
 	int fork_point;
 	int update_refs;
 	int config_autosquash;
+	int config_rebase_merges;
 	int config_update_refs;
 };
 
@@ -141,6 +142,8 @@ struct rebase_options {
 		.allow_empty_message = 1,               \
 		.autosquash = -1,                       \
 		.config_autosquash = -1,                \
+		.rebase_merges = -1,                    \
+		.config_rebase_merges = -1,             \
 		.update_refs = -1,                      \
 		.config_update_refs = -1,               \
 	}
@@ -772,6 +775,16 @@ static int run_specific_rebase(struct rebase_options *opts)
 	return status ? -1 : 0;
 }
 
+static void parse_rebase_merges_value(struct rebase_options *options, const char *value)
+{
+	if (!strcmp("no-rebase-cousins", value))
+		options->rebase_cousins = 0;
+	else if (!strcmp("rebase-cousins", value))
+		options->rebase_cousins = 1;
+	else
+		die(_("Unknown rebase-merges mode: %s"), value);
+}
+
 static int rebase_config(const char *var, const char *value, void *data)
 {
 	struct rebase_options *opts = data;
@@ -801,6 +814,17 @@ static int rebase_config(const char *var, const char *value, void *data)
 		return 0;
 	}
 
+	if (!strcmp(var, "rebase.rebasemerges")) {
+		opts->config_rebase_merges = git_parse_maybe_bool(value);
+		if (opts->config_rebase_merges < 0) {
+			opts->config_rebase_merges = 1;
+			parse_rebase_merges_value(opts, value);
+		} else {
+			opts->rebase_cousins = 0;
+		}
+		return 0;
+	}
+
 	if (!strcmp(var, "rebase.updaterefs")) {
 		opts->config_update_refs = git_config_bool(var, value);
 		return 0;
@@ -981,6 +1005,28 @@ static int parse_opt_empty(const struct option *opt, const char *arg, int unset)
 	return 0;
 }
 
+static int parse_opt_rebase_merges(const struct option *opt, const char *arg, int unset)
+{
+	struct rebase_options *options = opt->value;
+
+	options->rebase_merges = !unset;
+	options->rebase_cousins = 0;
+
+	if (arg) {
+		if (!*arg) {
+			warning(_("--rebase-merges with an empty string "
+				  "argument is deprecated and will stop "
+				  "working in a future version of Git. Use "
+				  "--rebase-merges without an argument "
+				  "instead, which does the same thing."));
+			return 0;
+		}
+		parse_rebase_merges_value(options, arg);
+	}
+
+	return 0;
+}
+
 static void NORETURN error_on_missing_default_upstream(void)
 {
 	struct branch *current_branch = branch_get(NULL);
@@ -1036,7 +1082,6 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 	struct object_id branch_base;
 	int ignore_whitespace = 0;
 	const char *gpg_sign = NULL;
-	const char *rebase_merges = NULL;
 	struct string_list strategy_options = STRING_LIST_INIT_NODUP;
 	struct object_id squash_onto;
 	char *squash_onto_name = NULL;
@@ -1138,10 +1183,9 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 			   &options.allow_empty_message,
 			   N_("allow rebasing commits with empty messages"),
 			   PARSE_OPT_HIDDEN),
-		{OPTION_STRING, 'r', "rebase-merges", &rebase_merges,
-			N_("mode"),
+		OPT_CALLBACK_F('r', "rebase-merges", &options, N_("mode"),
 			N_("try to rebase merges instead of skipping them"),
-			PARSE_OPT_OPTARG, NULL, (intptr_t)"no-rebase-cousins"},
+			PARSE_OPT_OPTARG, parse_opt_rebase_merges),
 		OPT_BOOL(0, "fork-point", &options.fork_point,
 			 N_("use 'merge-base --fork-point' to refine upstream")),
 		OPT_STRING('s', "strategy", &options.strategy,
@@ -1437,21 +1481,6 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 	if (options.exec.nr)
 		imply_merge(&options, "--exec");
 
-	if (rebase_merges) {
-		if (!*rebase_merges)
-			warning(_("--rebase-merges with an empty string "
-				  "argument is deprecated and will stop "
-				  "working in a future version of Git. Use "
-				  "--rebase-merges without an argument "
-				  "instead, which does the same thing."));
-		else if (!strcmp("rebase-cousins", rebase_merges))
-			options.rebase_cousins = 1;
-		else if (strcmp("no-rebase-cousins", rebase_merges))
-			die(_("Unknown mode: %s"), rebase_merges);
-		options.rebase_merges = 1;
-		imply_merge(&options, "--rebase-merges");
-	}
-
 	if (options.type == REBASE_APPLY) {
 		if (ignore_whitespace)
 			strvec_push(&options.git_am_opts,
@@ -1519,6 +1548,8 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 					  "cannot be used together"));
 			else if (options.autosquash == -1 && options.config_autosquash == 1)
 				die(_("apply options are incompatible with rebase.autoSquash.  Consider adding --no-autosquash"));
+			else if (options.rebase_merges == -1 && options.config_rebase_merges == 1)
+				die(_("apply options are incompatible with rebase.rebaseMerges.  Consider adding --no-rebase-merges"));
 			else if (options.update_refs == -1 && options.config_update_refs == 1)
 				die(_("apply options are incompatible with rebase.updateRefs.  Consider adding --no-update-refs"));
 			else
@@ -1531,6 +1562,11 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 	options.update_refs = (options.update_refs >= 0) ? options.update_refs :
 			     ((options.config_update_refs >= 0) ? options.config_update_refs : 0);
 
+	if (options.rebase_merges == 1)
+		imply_merge(&options, "--rebase-merges");
+	options.rebase_merges = (options.rebase_merges >= 0) ? options.rebase_merges :
+				((options.config_rebase_merges >= 0) ? options.config_rebase_merges : 0);
+
 	if (options.autosquash == 1)
 		imply_merge(&options, "--autosquash");
 	options.autosquash = (options.autosquash >= 0) ? options.autosquash :
diff --git a/t/t3422-rebase-incompatible-options.sh b/t/t3422-rebase-incompatible-options.sh
index 4711b37a28..2eba00bdf5 100755
--- a/t/t3422-rebase-incompatible-options.sh
+++ b/t/t3422-rebase-incompatible-options.sh
@@ -85,6 +85,11 @@ test_rebase_am_only () {
 		test_must_fail git rebase $opt --reapply-cherry-picks A
 	"
 
+	test_expect_success "$opt incompatible with --rebase-merges" "
+		git checkout B^0 &&
+		test_must_fail git rebase $opt --rebase-merges A
+	"
+
 	test_expect_success "$opt incompatible with --update-refs" "
 		git checkout B^0 &&
 		test_must_fail git rebase $opt --update-refs A
@@ -101,6 +106,12 @@ test_rebase_am_only () {
 		grep -e --no-autosquash err
 	"
 
+	test_expect_success "$opt incompatible with rebase.rebaseMerges" "
+		git checkout B^0 &&
+		test_must_fail git -c rebase.rebaseMerges=true rebase $opt A 2>err &&
+		grep -e --no-rebase-merges err
+	"
+
 	test_expect_success "$opt incompatible with rebase.updateRefs" "
 		git checkout B^0 &&
 		test_must_fail git -c rebase.updateRefs=true rebase $opt A 2>err &&
@@ -113,6 +124,12 @@ test_rebase_am_only () {
 		git -c rebase.autosquash=true rebase --no-autosquash $opt A
 	"
 
+	test_expect_success "$opt okay with overridden rebase.rebaseMerges" "
+		test_when_finished \"git reset --hard B^0\" &&
+		git checkout B^0 &&
+		git -c rebase.rebaseMerges=true rebase --no-rebase-merges $opt A
+	"
+
 	test_expect_success "$opt okay with overridden rebase.updateRefs" "
 		test_when_finished \"git reset --hard B^0\" &&
 		git checkout B^0 &&
diff --git a/t/t3430-rebase-merges.sh b/t/t3430-rebase-merges.sh
index d46d9545f2..f03599c63b 100755
--- a/t/t3430-rebase-merges.sh
+++ b/t/t3430-rebase-merges.sh
@@ -278,6 +278,40 @@ test_expect_success 'do not rebase cousins unless asked for' '
 	EOF
 '
 
+test_expect_success 'rebase.rebaseMerges=rebase-cousins is equivalent to --rebase-merges=rebase-cousins' '
+	test_config rebase.rebaseMerges rebase-cousins &&
+	git checkout -b config-rebase-cousins main &&
+	git rebase HEAD^ &&
+	test_cmp_graph HEAD^.. <<-\EOF
+	*   Merge the topic branch '\''onebranch'\''
+	|\
+	| * D
+	| * G
+	|/
+	o H
+	EOF
+'
+
+test_expect_success '--no-rebase-merges overrides rebase.rebaseMerges=no-rebase-cousins' '
+	test_config rebase.rebaseMerges no-rebase-cousins &&
+	git checkout -b override-config-no-rebase-cousins E &&
+	git rebase --no-rebase-merges C &&
+	test_cmp_graph C.. <<-\EOF
+	* B
+	* D
+	o C
+	EOF
+'
+
+test_expect_success '--rebase-merges overrides rebase.rebaseMerges=rebase-cousins' '
+	test_config rebase.rebaseMerges rebase-cousins &&
+	git checkout -b override-config-rebase-cousins E &&
+	before="$(git rev-parse --verify HEAD)" &&
+	test_tick &&
+	git rebase --rebase-merges C &&
+	test_cmp_rev HEAD $before
+'
+
 test_expect_success 'refs/rewritten/* is worktree-local' '
 	git worktree add wt &&
 	cat >wt/script-from-scratch <<-\EOF &&