diff --git a/include/sway/commands.h b/include/sway/commands.h
index 389c382eb2..a29fdad82f 100644
--- a/include/sway/commands.h
+++ b/include/sway/commands.h
@@ -106,6 +106,7 @@ sway_cmd cmd_exec_process;
 
 sway_cmd cmd_allow_tearing;
 sway_cmd cmd_assign;
+sway_cmd cmd_assign_parent_workspace;
 sway_cmd cmd_bar;
 sway_cmd cmd_bindcode;
 sway_cmd cmd_bindgesture;
diff --git a/include/sway/criteria.h b/include/sway/criteria.h
index fad278e021..e7e76e5b7b 100644
--- a/include/sway/criteria.h
+++ b/include/sway/criteria.h
@@ -17,6 +17,7 @@ enum criteria_type {
 	CT_ASSIGN_WORKSPACE        = 1 << 2,
 	CT_ASSIGN_WORKSPACE_NUMBER = 1 << 3,
 	CT_NO_FOCUS                = 1 << 4,
+	CT_ASSIGN_PARENT_WORKSPACE = 1 << 5,
 };
 
 enum pattern_type {
diff --git a/sway/commands.c b/sway/commands.c
index c2c12ee655..0e7e501662 100644
--- a/sway/commands.c
+++ b/sway/commands.c
@@ -43,6 +43,7 @@ struct cmd_results *checkarg(int argc, const char *name, enum expected_args type
 /* Keep alphabetized */
 static const struct cmd_handler handlers[] = {
 	{ "assign", cmd_assign },
+	{ "assign_parent_workspace", cmd_assign_parent_workspace },
 	{ "bar", cmd_bar },
 	{ "bindcode", cmd_bindcode },
 	{ "bindgesture", cmd_bindgesture },
diff --git a/sway/commands/assign_parent_workspace.c b/sway/commands/assign_parent_workspace.c
new file mode 100644
index 0000000000..ab809eef05
--- /dev/null
+++ b/sway/commands/assign_parent_workspace.c
@@ -0,0 +1,34 @@
+#include <string.h>
+#include "sway/commands.h"
+#include "sway/criteria.h"
+#include "list.h"
+#include "log.h"
+
+struct cmd_results *cmd_assign_parent_workspace(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "assign_parent_workspace", EXPECTED_AT_LEAST, 1))) {
+		return error;
+	}
+
+	char *err_str = NULL;
+	struct criteria *criteria = criteria_parse(argv[0], &err_str);
+	if (!criteria) {
+		error = cmd_results_new(CMD_INVALID, "%s", err_str);
+		free(err_str);
+		return error;
+	}
+
+	criteria->type = CT_ASSIGN_PARENT_WORKSPACE;
+
+	// Check if it already exists
+	if (criteria_already_exists(criteria)) {
+		sway_log(SWAY_DEBUG, "assign_parent_workspace already exists: '%s'", criteria->raw);
+		criteria_destroy(criteria);
+		return cmd_results_new(CMD_SUCCESS, NULL);
+	}
+
+	list_add(config->criteria, criteria);
+	sway_log(SWAY_DEBUG, "assign_parent_workspace: '%s' added", criteria->raw);
+
+	return cmd_results_new(CMD_SUCCESS, NULL);
+}
diff --git a/sway/meson.build b/sway/meson.build
index cb03a4d288..c2e8b2f928 100644
--- a/sway/meson.build
+++ b/sway/meson.build
@@ -44,6 +44,7 @@ sway_sources = files(
 
 	'commands/allow_tearing.c',
 	'commands/assign.c',
+	'commands/assign_parent_workspace.c',
 	'commands/bar.c',
 	'commands/bind.c',
 	'commands/border.c',
diff --git a/sway/tree/view.c b/sway/tree/view.c
index 3d6211249f..a4dc986062 100644
--- a/sway/tree/view.c
+++ b/sway/tree/view.c
@@ -577,12 +577,51 @@ void view_assign_ctx(struct sway_view *view, struct launcher_ctx *ctx) {
 	view->ctx = ctx;
 }
 
+static struct sway_workspace *get_parent_workspace(struct sway_view *view) {
+	// Try to get the parent view's workspace for both XDG and XWayland windows
+	struct sway_view *parent_view = NULL;
+
+	// Check for XDG Shell parent
+	if (view->wlr_xdg_toplevel && view->wlr_xdg_toplevel->parent) {
+		struct wlr_xdg_surface *parent_surface = view->wlr_xdg_toplevel->parent->base;
+		if (parent_surface) {
+			struct sway_view *xdg_parent_view = view_from_wlr_xdg_surface(parent_surface);
+			if (xdg_parent_view && xdg_parent_view->container) {
+				parent_view = xdg_parent_view;
+			}
+		}
+	}
+
+#if WLR_HAS_XWAYLAND
+	// Check for XWayland parent (only for XWayland views!)
+	if (!parent_view && view->type == SWAY_VIEW_XWAYLAND &&
+			view->wlr_xwayland_surface && view->wlr_xwayland_surface->parent) {
+		struct wlr_xwayland_surface *parent_xsurface = view->wlr_xwayland_surface->parent;
+
+		// Check if parent surface is mapped and has valid data
+		if (parent_xsurface->surface && parent_xsurface->surface->mapped && parent_xsurface->data) {
+			struct sway_view *xw_parent_view = view_from_wlr_xwayland_surface(parent_xsurface);
+			if (xw_parent_view && xw_parent_view->container) {
+				parent_view = xw_parent_view;
+			}
+		}
+	}
+#endif
+
+	// If we found a parent view with a container, return its workspace
+	if (parent_view && parent_view->container) {
+		return parent_view->container->pending.workspace;
+	}
+
+	return NULL;
+}
+
 static struct sway_workspace *select_workspace(struct sway_view *view) {
 	struct sway_seat *seat = input_manager_current_seat();
 
 	// Check if there's any `assign` criteria for the view
 	list_t *criterias = criteria_for_view(view,
-			CT_ASSIGN_WORKSPACE | CT_ASSIGN_WORKSPACE_NUMBER | CT_ASSIGN_OUTPUT);
+			CT_ASSIGN_WORKSPACE | CT_ASSIGN_WORKSPACE_NUMBER | CT_ASSIGN_OUTPUT | CT_ASSIGN_PARENT_WORKSPACE);
 	struct sway_workspace *ws = NULL;
 	for (int i = 0; i < criterias->length; ++i) {
 		struct criteria *criteria = criterias->items[i];
@@ -592,6 +631,12 @@ static struct sway_workspace *select_workspace(struct sway_view *view) {
 				ws = output_get_active_workspace(output);
 				break;
 			}
+		} else if (criteria->type == CT_ASSIGN_PARENT_WORKSPACE) {
+			// Assign to parent's workspace if parent exists
+			ws = get_parent_workspace(view);
+			if (ws) {
+				break;
+			}
 		} else {
 			// CT_ASSIGN_WORKSPACE(_NUMBER)
 			ws = criteria->type == CT_ASSIGN_WORKSPACE_NUMBER ?