diff --git a/src/components/dropdown/Dropdown.vue b/src/components/dropdown/Dropdown.vue
index c062149bf2..8c4c1b6efc 100644
--- a/src/components/dropdown/Dropdown.vue
+++ b/src/components/dropdown/Dropdown.vue
@@ -20,7 +20,7 @@
                 <div ref="itemsWrapper" class="p-dropdown-items-wrapper" :style="{'max-height': scrollHeight}">
                     <ul class="p-dropdown-items p-dropdown-list p-component" role="listbox">
                         <li v-for="(option, i) of visibleOptions" :class="['p-dropdown-item', {'p-highlight': isSelected(option), 'p-disabled': isOptionDisabled(option)}]"
-                            :aria-label="getOptionLabel(option)" :key="getOptionLabel(option) + '_' + i" @click="onOptionSelect($event, option)" role="option" :aria-selected="isSelected(option)">
+                            :aria-label="getOptionLabel(option)" :key="getOptionRenderKey(option)" @click="onOptionSelect($event, option)" role="option" :aria-selected="isSelected(option)">
                             <slot name="option" :option="option" :index="i">
                                 {{getOptionLabel(option)}}
                             </slot>
@@ -89,6 +89,9 @@ export default {
         getOptionValue(option) {
             return this.optionValue ? ObjectUtils.resolveFieldData(option, this.optionValue) : option;
         },
+        getOptionRenderKey(option) {
+            return this.dataKey ? ObjectUtils.resolveFieldData(option, this.dataKey) : this.getOptionLabel(option);
+        },
         isOptionDisabled(option) {
             return this.optionDisabled ? ObjectUtils.resolveFieldData(option, this.optionDisabled) : false;
         },
diff --git a/src/components/listbox/Listbox.vue b/src/components/listbox/Listbox.vue
index ecdcfa0c74..7a9da051bc 100644
--- a/src/components/listbox/Listbox.vue
+++ b/src/components/listbox/Listbox.vue
@@ -9,7 +9,7 @@
         <div class="p-listbox-list-wrapper" :style="listStyle">
             <ul class="p-listbox-list" role="listbox" aria-multiselectable="multiple">
                 <li v-for="(option, i) of visibleOptions" :tabindex="isOptionDisabled(option) ? null : '0'" :class="['p-listbox-item', {'p-highlight': isSelected(option), 'p-disabled': isOptionDisabled(option)}]"
-                    :aria-label="getOptionLabel(option)" :key="getOptionLabel(option)" @click="onOptionSelect($event, option)" @touchend="onOptionTouchEnd()" @keydown="onOptionKeyDown($event, option)" role="option" :aria-selected="isSelected(option)">
+                    :aria-label="getOptionLabel(option)" :key="getOptionRenderKey(option)" @click="onOptionSelect($event, option)" @touchend="onOptionTouchEnd()" @keydown="onOptionKeyDown($event, option)" role="option" :aria-selected="isSelected(option)">
                     <slot name="option" :option="option" :index="i">
                         {{getOptionLabel(option)}}
                     </slot>
@@ -50,6 +50,9 @@ export default {
         getOptionValue(option) {
             return this.optionValue ? ObjectUtils.resolveFieldData(option, this.optionValue) : option;
         },
+        getOptionRenderKey(option) {
+            return this.dataKey ? ObjectUtils.resolveFieldData(option, this.dataKey) : this.getOptionLabel(option);
+        },
         isOptionDisabled(option) {
             return this.optionDisabled ? ObjectUtils.resolveFieldData(option, this.optionDisabled) : false;
         },
diff --git a/src/components/multiselect/MultiSelect.vue b/src/components/multiselect/MultiSelect.vue
index e8908a7d32..ea0a2e591a 100644
--- a/src/components/multiselect/MultiSelect.vue
+++ b/src/components/multiselect/MultiSelect.vue
@@ -36,7 +36,7 @@
                 <div ref="itemsWrapper" class="p-multiselect-items-wrapper" :style="{'max-height': scrollHeight}">
                     <ul class="p-multiselect-items p-multiselect-list p-component" role="listbox" aria-multiselectable="true">
                         <li v-for="(option, i) of visibleOptions" :class="['p-multiselect-item', {'p-highlight': isSelected(option), 'p-disabled': isOptionDisabled(option)}]" role="option" :aria-selected="isSelected(option)"
-                            :aria-label="getOptionLabel(option)" :key="getOptionLabel(option)" @click="onOptionSelect($event, option)" @keydown="onOptionKeyDown($event, option)" :tabindex="tabindex||'0'">
+                            :aria-label="getOptionLabel(option)" :key="getOptionRenderKey(option)" @click="onOptionSelect($event, option)" @keydown="onOptionKeyDown($event, option)" :tabindex="tabindex||'0'">
                             <div class="p-checkbox p-component">
                                 <div :class="['p-checkbox-box p-component', {'p-highlight': isSelected(option)}]">
                                     <span :class="['p-checkbox-icon p-c', {'pi pi-check': isSelected(option)}]"></span>
@@ -105,6 +105,9 @@ export default {
         getOptionValue(option) {
             return this.optionValue ? ObjectUtils.resolveFieldData(option, this.optionValue) : option;
         },
+        getOptionRenderKey(option) {
+            return this.dataKey ? ObjectUtils.resolveFieldData(option, this.dataKey) : this.getOptionLabel(option);
+        },
         isOptionDisabled(option) {
             return this.optionDisabled ? ObjectUtils.resolveFieldData(option, this.optionDisabled) : false;
         },
diff --git a/src/components/selectbutton/SelectButton.vue b/src/components/selectbutton/SelectButton.vue
index 8ce391a55c..4fb747892f 100644
--- a/src/components/selectbutton/SelectButton.vue
+++ b/src/components/selectbutton/SelectButton.vue
@@ -1,6 +1,6 @@
 <template>
     <div :class="containerClass" role="group">
-        <div v-for="(option, i) of options" :key="getOptionLabel(option)" :aria-label="getOptionLabel(option)" role="button" :aria-pressed="isSelected(option)"
+        <div v-for="(option, i) of options" :key="getOptionRenderKey(option)" :aria-label="getOptionLabel(option)" role="button" :aria-pressed="isSelected(option)"
             @click="onOptionSelect($event, option, i)" @keydown.enter.prevent="onOptionSelect($event, option, i)" @keydown.space.prevent="onOptionSelect($event, option)"
             :tabindex="isOptionDisabled(option) ? null : '0'" @focus="onFocus($event, i)" @blur="onBlur($event)" :aria-labelledby="ariaLabelledBy"
             :class="['p-button p-component p-button-text-only', {'p-highlight': isSelected(option), 'p-disabled': isOptionDisabled(option), 'p-focus': (i === focusedIndex)}]">
@@ -38,6 +38,9 @@ export default {
         getOptionValue(option) {
             return this.optionValue ? ObjectUtils.resolveFieldData(option, this.optionValue) : option;
         },
+        getOptionRenderKey(option) {
+            return this.dataKey ? ObjectUtils.resolveFieldData(option, this.dataKey) : this.getOptionLabel(option);
+        },
         isOptionDisabled(option) {
             return this.optionDisabled ? ObjectUtils.resolveFieldData(option, this.optionDisabled) : false;
         },