diff --git a/packages/primevue/src/cascadeselect/BaseCascadeSelect.vue b/packages/primevue/src/cascadeselect/BaseCascadeSelect.vue
index 1cf8e5cb6..3031c819d 100644
--- a/packages/primevue/src/cascadeselect/BaseCascadeSelect.vue
+++ b/packages/primevue/src/cascadeselect/BaseCascadeSelect.vue
@@ -14,6 +14,10 @@ export default {
         optionGroupLabel: null,
         optionGroupChildren: null,
         placeholder: String,
+        breakpoint: {
+            type: String,
+            default: '960px'
+        },
         variant: {
             type: String,
             default: null
diff --git a/packages/primevue/src/cascadeselect/CascadeSelect.vue b/packages/primevue/src/cascadeselect/CascadeSelect.vue
index 1a4b0e280..ca2065ce1 100644
--- a/packages/primevue/src/cascadeselect/CascadeSelect.vue
+++ b/packages/primevue/src/cascadeselect/CascadeSelect.vue
@@ -109,6 +109,7 @@ export default {
         $pcFluid: { default: null }
     },
     outsideClickListener: null,
+    matchMediaListener: null,
     scrollHandler: null,
     resizeListener: null,
     overlay: null,
@@ -122,7 +123,10 @@ export default {
             focusedOptionInfo: { index: -1, level: 0, parentKey: '' },
             activeOptionPath: [],
             overlayVisible: false,
-            dirty: false
+            dirty: false,
+            mobileActive: false,
+            query: null,
+            queryMatches: false
         };
     },
     watch: {
@@ -136,10 +140,12 @@ export default {
     mounted() {
         this.id = this.id || UniqueComponentId();
         this.autoUpdateModel();
+        this.bindMatchMediaListener();
     },
     beforeUnmount() {
         this.unbindOutsideClickListener();
         this.unbindResizeListener();
+        this.unbindMatchMediaListener();
 
         if (this.scrollHandler) {
             this.scrollHandler.destroy();
@@ -150,6 +156,10 @@ export default {
             ZIndex.clear(this.overlay);
             this.overlay = null;
         }
+
+        if (this.mobileActive) {
+            this.mobileActive = false;
+        }
     },
     methods: {
         getOptionLabel(option) {
@@ -571,6 +581,27 @@ export default {
                 this.resizeListener = null;
             }
         },
+        bindMatchMediaListener() {
+            if (!this.matchMediaListener) {
+                const query = matchMedia(`(max-width: ${this.breakpoint})`);
+
+                this.query = query;
+                this.queryMatches = query.matches;
+
+                this.matchMediaListener = () => {
+                    this.queryMatches = query.matches;
+                    this.mobileActive = false;
+                };
+
+                this.query.addEventListener('change', this.matchMediaListener);
+            }
+        },
+        unbindMatchMediaListener() {
+            if (this.matchMediaListener) {
+                this.query.removeEventListener('change', this.matchMediaListener);
+                this.matchMediaListener = null;
+            }
+        },
         isOptionMatched(processedOption) {
             return this.isValidOption(processedOption) && this.getProccessedOptionLabel(processedOption)?.toLocaleLowerCase(this.searchLocale).startsWith(this.searchValue.toLocaleLowerCase(this.searchLocale));
         },
diff --git a/packages/primevue/src/cascadeselect/CascadeSelectSub.vue b/packages/primevue/src/cascadeselect/CascadeSelectSub.vue
index cabe4727d..91bad4584 100644
--- a/packages/primevue/src/cascadeselect/CascadeSelectSub.vue
+++ b/packages/primevue/src/cascadeselect/CascadeSelectSub.vue
@@ -48,7 +48,6 @@
                     @option-focus-change="onOptionFocusChange"
                     :pt="pt"
                     :unstyled="unstyled"
-                    :isParentMount="mounted"
                 />
             </li>
         </template>
@@ -86,23 +85,7 @@ export default {
         templates: null,
         isParentMount: Boolean
     },
-    data() {
-        return {
-            mounted: false
-        };
-    },
-    watch: {
-        isParentMount: {
-            handler(newValue) {
-                newValue && nestedPosition(this.container, this.level);
-            }
-        }
-    },
-    mounted() {
-        // entering order correction when an option is selected
-        (this.isParentMount || this.level === 0) && nestedPosition(this.container, this.level);
-        this.mounted = true;
-    },
+
     methods: {
         getOptionId(processedOption) {
             return `${this.selectId}_${processedOption.key}`;
diff --git a/packages/primevue/src/cascadeselect/style/CascadeSelectStyle.js b/packages/primevue/src/cascadeselect/style/CascadeSelectStyle.js
index d83ed181d..d734c42e5 100644
--- a/packages/primevue/src/cascadeselect/style/CascadeSelectStyle.js
+++ b/packages/primevue/src/cascadeselect/style/CascadeSelectStyle.js
@@ -144,11 +144,15 @@ const theme = ({ dt }) => `
 
 .p-cascadeselect-option-active {
     overflow: visible;
-    background: ${dt('cascadeselect.option.focus.background')};
-    color: ${dt('cascadeselect.option.focus.color')};
 }
 
-.p-cascadeselect-option:not(.p-cascadeselect-option-selected):not(.p-disabled).p-focus {
+.p-cascadeselect-option-active > .p-cascadeselect-option-content {
+    background: ${dt('cascadeselect.option.focus.background')};
+    color: ${dt('cascadeselect.option.focus.color')};
+    border-radius: ${dt('cascadeselect.option.border.radius')};
+}
+
+.p-cascadeselect-option:not(.p-cascadeselect-option-selected):not(.p-disabled).p-focus > .p-cascadeselect-option-content {
     background: ${dt('cascadeselect.option.focus.background')};
     color: ${dt('cascadeselect.option.focus.color')};
 }
@@ -157,7 +161,7 @@ const theme = ({ dt }) => `
     color: ${dt('cascadeselect.option.icon.focus.color')};
 }
 
-.p-cascadeselect-option-selected {
+.p-cascadeselect-option-selected .p-cascadeselect-option-content {
     background: ${dt('cascadeselect.option.selected.background')};
     color: ${dt('cascadeselect.option.selected.color')};
 }
@@ -188,6 +192,39 @@ const theme = ({ dt }) => `
     height: ${dt('cascadeselect.option.icon.size')};
     color: ${dt('cascadeselect.option.icon.color')};
 }
+
+.p-cascadeselect-mobile-active .p-cascadeselect-option-content {
+    border-radius: ${dt('cascadeselect.option.border.radius')};
+}
+
+.p-cascadeselect-mobile-active-active .p-cascadeselect-list {
+    display: flex;
+    flex-direction: column;
+    top: 100%;
+    left: 0;
+    z-index: 1;
+}
+
+.p-cascadeselect-mobile-active .p-cascadeselect-list > .p-cascadeselect-option > .p-cascadeselect-option-content .p-cascadeselect-group-icon {
+    margin-left: auto;
+    transition: transform 0.2s;
+}
+
+.p-cascadeselect-mobile-active .p-cascadeselect-list .p-cascadeselect-group-icon {
+    transition: transform 0.2s;
+    transform: rotate(90deg);
+}
+
+.p-cascadeselect-mobile-active .p-cascadeselect-option-active > .p-cascadeselect-option-content .p-cascadeselect-group-icon {
+    transform: rotate(-90deg);
+}
+
+.p-cascadeselect-mobile-active .p-cascadeselect-option-list {
+    position: static;
+    box-shadow: none;
+    border: 0 none;
+    padding-left: ${dt('cascadeselect.list.mobile.indent')};
+}
 `;
 
 const inlineStyles = {
@@ -198,6 +235,7 @@ const classes = {
     root: ({ instance, props }) => [
         'p-cascadeselect p-component p-inputwrapper',
         {
+            'p-cascadeselect-mobile': instance.queryMatches,
             'p-disabled': props.disabled,
             'p-invalid': props.invalid,
             'p-variant-filled': props.variant ? props.variant === 'filled' : instance.$primevue.config.inputStyle === 'filled' || instance.$primevue.config.inputVariant === 'filled',
@@ -218,8 +256,13 @@ const classes = {
     dropdown: 'p-cascadeselect-dropdown',
     loadingIcon: 'p-cascadeselect-loading-icon',
     dropdownIcon: 'p-cascadeselect-dropdown-icon',
-    overlay: 'p-cascadeselect-overlay p-component',
-    listContainer: 'p-cascadeselect-list-container',
+    overlay: ({ instance }) => [
+        'p-cascadeselect-overlay p-component',
+        {
+            'p-cascadeselect-mobile-active': instance.queryMatches
+        }
+    ],
+    listContainer: 'p-cascadeselect-list',
     list: 'p-cascadeselect-list',
     option: ({ instance, processedOption }) => [
         'p-cascadeselect-option',
diff --git a/packages/themes/src/presets/aura/cascadeselect/index.js b/packages/themes/src/presets/aura/cascadeselect/index.js
index f19c746d2..a96da0652 100644
--- a/packages/themes/src/presets/aura/cascadeselect/index.js
+++ b/packages/themes/src/presets/aura/cascadeselect/index.js
@@ -38,7 +38,8 @@ export default {
     },
     list: {
         padding: '{list.padding}',
-        gap: '{list.gap}'
+        gap: '{list.gap}',
+        mobileIndent: '1rem'
     },
     option: {
         focusBackground: '{list.option.focus.background}',
diff --git a/packages/themes/src/presets/lara/cascadeselect/index.js b/packages/themes/src/presets/lara/cascadeselect/index.js
index f19c746d2..7d2a9d0ff 100644
--- a/packages/themes/src/presets/lara/cascadeselect/index.js
+++ b/packages/themes/src/presets/lara/cascadeselect/index.js
@@ -38,7 +38,8 @@ export default {
     },
     list: {
         padding: '{list.padding}',
-        gap: '{list.gap}'
+        gap: '{list.gap}',
+        mobileIndent: '1.25rem'
     },
     option: {
         focusBackground: '{list.option.focus.background}',
diff --git a/packages/themes/src/presets/material/cascadeselect/index.js b/packages/themes/src/presets/material/cascadeselect/index.js
index e17764179..6b6fbcc09 100644
--- a/packages/themes/src/presets/material/cascadeselect/index.js
+++ b/packages/themes/src/presets/material/cascadeselect/index.js
@@ -38,7 +38,8 @@ export default {
     },
     list: {
         padding: '{list.padding}',
-        gap: '{list.gap}'
+        gap: '{list.gap}',
+        mobileIndent: '1rem'
     },
     option: {
         focusBackground: '{list.option.focus.background}',
diff --git a/packages/themes/src/presets/nora/cascadeselect/index.js b/packages/themes/src/presets/nora/cascadeselect/index.js
index f19c746d2..a96da0652 100644
--- a/packages/themes/src/presets/nora/cascadeselect/index.js
+++ b/packages/themes/src/presets/nora/cascadeselect/index.js
@@ -38,7 +38,8 @@ export default {
     },
     list: {
         padding: '{list.padding}',
-        gap: '{list.gap}'
+        gap: '{list.gap}',
+        mobileIndent: '1rem'
     },
     option: {
         focusBackground: '{list.option.focus.background}',