diff --git a/packages/eui/changelogs/upcoming/8236.md b/packages/eui/changelogs/upcoming/8236.md
new file mode 100644
index 00000000000..d6067d0e524
--- /dev/null
+++ b/packages/eui/changelogs/upcoming/8236.md
@@ -0,0 +1,3 @@
+**Accessibility**
+
+- Improved the `EuiAccordionTrigger`'s screen reader UX. Passed `aria-hidden` to the `EuiAccordionArrow` to avoid duplicated announcements by screen readers.
\ No newline at end of file
diff --git a/packages/eui/src/components/accordion/__snapshots__/accordion.test.tsx.snap b/packages/eui/src/components/accordion/__snapshots__/accordion.test.tsx.snap
index 451b489a4a3..a12eb7b0389 100644
--- a/packages/eui/src/components/accordion/__snapshots__/accordion.test.tsx.snap
+++ b/packages/eui/src/components/accordion/__snapshots__/accordion.test.tsx.snap
@@ -12,6 +12,7 @@ exports[`EuiAccordion is rendered 1`] = `
     <button
       aria-controls="0"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed"
       tabindex="-1"
@@ -61,6 +62,7 @@ exports[`EuiAccordion isDisabled is rendered 1`] = `
     <button
       aria-controls="21"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-disabled-isDisabled-euiAccordion__arrow-left-isClosed"
       disabled=""
@@ -157,6 +159,7 @@ exports[`EuiAccordion props arrowDisplay right is rendered 1`] = `
     <button
       aria-controls="13"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-right-isClosed"
       tabindex="-1"
@@ -195,6 +198,7 @@ exports[`EuiAccordion props arrowProps is rendered 1`] = `
     <button
       aria-controls="15"
       aria-expanded="false"
+      aria-hidden="true"
       aria-label="aria-label"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow testClass1 testClass2 emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed-euiTestCss"
@@ -246,6 +250,7 @@ exports[`EuiAccordion props buttonContent is rendered 1`] = `
     <button
       aria-controls="3"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed"
       tabindex="-1"
@@ -299,6 +304,7 @@ exports[`EuiAccordion props buttonContentClassName is rendered 1`] = `
     <button
       aria-controls="2"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed"
       tabindex="-1"
@@ -348,6 +354,7 @@ exports[`EuiAccordion props buttonElement is rendered 1`] = `
     <button
       aria-controls="10"
       aria-expanded="false"
+      aria-hidden="false"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed"
       tabindex="0"
@@ -395,6 +402,7 @@ exports[`EuiAccordion props buttonProps is rendered 1`] = `
     <button
       aria-controls="4"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed"
       tabindex="-1"
@@ -446,6 +454,7 @@ exports[`EuiAccordion props buttonProps paddingSize l 1`] = `
     <button
       aria-controls="7"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed"
       tabindex="-1"
@@ -496,6 +505,7 @@ exports[`EuiAccordion props buttonProps paddingSize m 1`] = `
     <button
       aria-controls="6"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed"
       tabindex="-1"
@@ -546,6 +556,7 @@ exports[`EuiAccordion props buttonProps paddingSize s 1`] = `
     <button
       aria-controls="5"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed"
       tabindex="-1"
@@ -596,6 +607,7 @@ exports[`EuiAccordion props element is rendered 1`] = `
     <button
       aria-controls="1"
       aria-expanded="false"
+      aria-hidden="false"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed"
       tabindex="0"
@@ -643,6 +655,7 @@ exports[`EuiAccordion props extraAction is rendered 1`] = `
     <button
       aria-controls="11"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed"
       tabindex="-1"
@@ -699,6 +712,7 @@ exports[`EuiAccordion props forceState closed is rendered 1`] = `
     <button
       aria-controls="16"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed"
       tabindex="-1"
@@ -752,6 +766,7 @@ exports[`EuiAccordion props forceState open is rendered 1`] = `
     <button
       aria-controls="17"
       aria-expanded="true"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isOpen"
       tabindex="-1"
@@ -804,6 +819,7 @@ exports[`EuiAccordion props initialIsOpen is rendered 1`] = `
     <button
       aria-controls="12"
       aria-expanded="true"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isOpen"
       tabindex="-1"
@@ -856,6 +872,7 @@ exports[`EuiAccordion props isLoading is rendered 1`] = `
     <button
       aria-controls="19"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed"
       tabindex="-1"
@@ -914,6 +931,7 @@ exports[`EuiAccordion props isLoadingMessage is rendered 1`] = `
     <button
       aria-controls="20"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-left-isClosed"
       tabindex="-1"
diff --git a/packages/eui/src/components/accordion/accordion_trigger/accordion_trigger.tsx b/packages/eui/src/components/accordion/accordion_trigger/accordion_trigger.tsx
index 9f0cc29efef..a7eea0744ee 100644
--- a/packages/eui/src/components/accordion/accordion_trigger/accordion_trigger.tsx
+++ b/packages/eui/src/components/accordion/accordion_trigger/accordion_trigger.tsx
@@ -62,6 +62,7 @@ export const EuiAccordionTrigger: FunctionComponent<
       aria-controls={ariaControlsId}
       aria-expanded={isOpen}
       aria-labelledby={buttonId}
+      aria-hidden={buttonIsInteractive ? 'true' : 'false'}
       tabIndex={buttonIsInteractive ? -1 : 0}
     />
   );
diff --git a/packages/eui/src/components/collapsible_nav/collapsible_nav_group/__snapshots__/collapsible_nav_group.test.tsx.snap b/packages/eui/src/components/collapsible_nav/collapsible_nav_group/__snapshots__/collapsible_nav_group.test.tsx.snap
index 7f6277f2a14..56faaf053ff 100644
--- a/packages/eui/src/components/collapsible_nav/collapsible_nav_group/__snapshots__/collapsible_nav_group.test.tsx.snap
+++ b/packages/eui/src/components/collapsible_nav/collapsible_nav_group/__snapshots__/collapsible_nav_group.test.tsx.snap
@@ -236,6 +236,7 @@ exports[`EuiCollapsibleNavGroup when isCollapsible is true accepts accordion pro
     <button
       aria-controls="id"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-right-isClosed"
       tabindex="-1"
@@ -300,6 +301,7 @@ exports[`EuiCollapsibleNavGroup when isCollapsible is true will render an accord
     <button
       aria-controls="id"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-right-isClosed"
       tabindex="-1"
diff --git a/packages/eui/src/components/collapsible_nav_beta/collapsible_nav_item/__snapshots__/collapsible_nav_accordion.test.tsx.snap b/packages/eui/src/components/collapsible_nav_beta/collapsible_nav_item/__snapshots__/collapsible_nav_accordion.test.tsx.snap
index fff981ec06d..85a06749e97 100644
--- a/packages/eui/src/components/collapsible_nav_beta/collapsible_nav_item/__snapshots__/collapsible_nav_accordion.test.tsx.snap
+++ b/packages/eui/src/components/collapsible_nav_beta/collapsible_nav_item/__snapshots__/collapsible_nav_accordion.test.tsx.snap
@@ -27,6 +27,7 @@ exports[`EuiCollapsibleNavAccordion renders as a sub item 1`] = `
     <button
       aria-controls="generated-id"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-right-isClosed-euiCollapsibleNavAccordion__arrow"
       tabindex="-1"
@@ -98,6 +99,7 @@ exports[`EuiCollapsibleNavAccordion renders as a top level item 1`] = `
     <button
       aria-controls="generated-id"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-right-isClosed-euiCollapsibleNavAccordion__arrow"
       tabindex="-1"
diff --git a/packages/eui/src/components/collapsible_nav_beta/collapsible_nav_item/__snapshots__/collapsible_nav_item.test.tsx.snap b/packages/eui/src/components/collapsible_nav_beta/collapsible_nav_item/__snapshots__/collapsible_nav_item.test.tsx.snap
index 9da7f91ea2d..f8256931643 100644
--- a/packages/eui/src/components/collapsible_nav_beta/collapsible_nav_item/__snapshots__/collapsible_nav_item.test.tsx.snap
+++ b/packages/eui/src/components/collapsible_nav_beta/collapsible_nav_item/__snapshots__/collapsible_nav_item.test.tsx.snap
@@ -55,6 +55,7 @@ exports[`EuiCollapsibleNavItem renders a top level accordion if items exist 1`]
     <button
       aria-controls="generated-id"
       aria-expanded="false"
+      aria-hidden="true"
       aria-labelledby="generated-id"
       class="euiButtonIcon euiAccordion__arrow emotion-euiButtonIcon-xs-empty-text-euiAccordion__arrow-right-isClosed-euiCollapsibleNavAccordion__arrow"
       tabindex="-1"