diff --git a/README.md b/README.md
index 99afeab..c420a43 100644
--- a/README.md
+++ b/README.md
@@ -262,6 +262,60 @@ err := client.Users.Delete(ctx, rownd.DeleteUserRequest{
 })
 ```
 
+### User Attributes
+
+User attributes are key-value pairs where values are arrays of strings. They can be used to store additional metadata like app variants, subscription status, or custom application data.
+
+```go
+// Create user with attributes
+user, err := client.Users.CreateOrUpdate(ctx, rownd.CreateOrUpdateUserRequest{
+    UserID: "__UUID__",
+    Data: map[string]interface{}{
+        "email": "user@example.com",
+        "first_name": "John",
+    },
+    Attributes: map[string][]string{
+        "rownd:app_variants": {"variant_1", "variant_2"},
+        "myapp:subscription_status": {"active"},
+        "myapp:loyalty_points": {"100"},
+    },
+})
+
+// Get user attributes
+attrs := user.GetAttributes()
+// attrs = {
+//     "rownd:app_variants": ["variant_1", "variant_2"],
+//     "myapp:subscription_status": ["active"],
+//     "myapp:loyalty_points": ["100"]
+// }
+
+// Add or update attributes (using PATCH)
+user, err = client.Users.AddAttributes(ctx, rownd.AddAttributesRequest{
+    UserID: "user_id",
+    Attributes: map[string][]string{
+        "myapp:loyalty_points": {"200"},  // Updates existing
+        "myapp:tier": {"gold"},           // Adds new
+    },
+})
+
+// Delete attributes (requires GET + PUT)
+user, err = client.Users.DeleteAttributes(ctx, rownd.DeleteAttributesRequest{
+    UserID: "user_id",
+    AttributeKeys: []string{"myapp:subscription_status", "myapp:tier"},
+})
+
+// You can also manage attributes directly via Patch/CreateOrUpdate
+user, err = client.Users.Patch(ctx, rownd.PatchUserRequest{
+    UserID: "user_id",
+    Data: map[string]any{
+        "email": "newemail@example.com",
+    },
+    Attributes: map[string][]string{
+        "myapp:new_attribute": {"value1", "value2"},
+    },
+})
+```
+
 ## Group Management
 
 ### Groups
diff --git a/pkg/rownd/user.go b/pkg/rownd/user.go
index 7f38589..3305f08 100644
--- a/pkg/rownd/user.go
+++ b/pkg/rownd/user.go
@@ -19,6 +19,7 @@ type User struct {
 	Groups        []UserGroupMembership     `json:"groups"`
 	Meta          UserMeta                  `json:"meta"`
 	ConnectionMap map[string]UserConnection `json:"connection_map"`
+	Attributes    map[string][]string       `json:"attributes"`
 }
 
 // UserConnection ...
@@ -223,6 +224,9 @@ type CreateOrUpdateUserRequest struct {
 
 	// ConnectionMap is optional
 	ConnectionMap []interface{} `json:"connection_map,omitempty"`
+
+	// Attributes are optional key-value pairs where values are arrays of strings
+	Attributes map[string][]string `json:"attributes,omitempty"`
 }
 
 func (r *CreateOrUpdateUserRequest) params() url.Values {
@@ -289,6 +293,9 @@ type PatchUserRequest struct {
 	WriteDataToIntegrations *bool `json:"-"`
 
 	Data map[string]any `json:"data"`
+
+	// Attributes are optional key-value pairs where values are arrays of strings
+	Attributes map[string][]string `json:"attributes,omitempty"`
 }
 
 func (r *PatchUserRequest) params() url.Values {
@@ -386,3 +393,141 @@ func (u *User) GetID() string {
 	}
 	return ""
 }
+
+// GetAttributes returns the user's attributes
+func (u *User) GetAttributes() map[string][]string {
+	if u.Attributes == nil {
+		return make(map[string][]string)
+	}
+	return u.Attributes
+}
+
+// AddAttributesRequest ...
+type AddAttributesRequest struct {
+	// UserID is the user id.
+	UserID string `json:"-"`
+
+	// Attributes to add
+	Attributes map[string][]string `json:"-"`
+
+	// WriteDataToIntegrations is a query parameter that dictates if Rownd should write the
+	// profile data changes to integrations attached to your application.
+	// default: true
+	WriteDataToIntegrations *bool `json:"-"`
+}
+
+func (r *AddAttributesRequest) validate() error {
+	var errs []error
+
+	if r.UserID == "" {
+		errs = append(errs, NewError(ErrValidation, "user id is required", nil))
+	}
+
+	if r.Attributes == nil || len(r.Attributes) == 0 {
+		errs = append(errs, NewError(ErrValidation, "attributes are required", nil))
+	}
+
+	if len(errs) == 0 {
+		return nil
+	}
+
+	return &MultiError{errors: errs}
+}
+
+// AddAttributes adds attributes to a user using PATCH
+func (c *userClient) AddAttributes(ctx context.Context, request AddAttributesRequest) (*User, error) {
+	if err := request.validate(); err != nil {
+		return nil, err
+	}
+
+	patchReq := PatchUserRequest{
+		UserID:                  request.UserID,
+		WriteDataToIntegrations: request.WriteDataToIntegrations,
+		Data:                    map[string]any{}, // Empty data since we're only updating attributes
+		Attributes:              request.Attributes,
+	}
+
+	return c.Patch(ctx, patchReq)
+}
+
+// DeleteAttributesRequest ...
+type DeleteAttributesRequest struct {
+	// UserID is the user id.
+	UserID string `json:"-"`
+
+	// AttributeKeys to delete
+	AttributeKeys []string `json:"-"`
+
+	// WriteDataToIntegrations is a query parameter that dictates if Rownd should write the
+	// profile data changes to integrations attached to your application.
+	// default: true
+	WriteDataToIntegrations *bool `json:"-"`
+}
+
+func (r *DeleteAttributesRequest) validate() error {
+	var errs []error
+
+	if r.UserID == "" {
+		errs = append(errs, NewError(ErrValidation, "user id is required", nil))
+	}
+
+	if r.AttributeKeys == nil || len(r.AttributeKeys) == 0 {
+		errs = append(errs, NewError(ErrValidation, "attribute keys are required", nil))
+	}
+
+	if len(errs) == 0 {
+		return nil
+	}
+
+	return &MultiError{errors: errs}
+}
+
+// DeleteAttributes deletes attributes from a user by fetching the full user and PUTing without those attributes
+func (c *userClient) DeleteAttributes(ctx context.Context, request DeleteAttributesRequest) (*User, error) {
+	if err := request.validate(); err != nil {
+		return nil, err
+	}
+
+	// First, get the current user
+	currentUser, err := c.Get(ctx, GetUserRequest{UserID: request.UserID})
+	if err != nil {
+		return nil, err
+	}
+
+	// Create a copy of attributes without the ones to delete
+	newAttributes := make(map[string][]string)
+	if currentUser.Attributes != nil {
+		for key, value := range currentUser.Attributes {
+			// Check if this key should be deleted
+			shouldDelete := false
+			for _, deleteKey := range request.AttributeKeys {
+				if key == deleteKey {
+					shouldDelete = true
+					break
+				}
+			}
+			if !shouldDelete {
+				newAttributes[key] = value
+			}
+		}
+	}
+
+	// Use CreateOrUpdate (PUT) to update the user with the new attributes
+	updateReq := CreateOrUpdateUserRequest{
+		UserID:                  request.UserID,
+		WriteDataToIntegrations: request.WriteDataToIntegrations,
+		Data:                    currentUser.Data,
+		Attributes:              newAttributes,
+	}
+
+	// Include ConnectionMap if it exists
+	if currentUser.ConnectionMap != nil && len(currentUser.ConnectionMap) > 0 {
+		// Convert ConnectionMap to []interface{} format expected by the API
+		connectionMap := make([]interface{}, 0)
+		// Note: The actual conversion logic would depend on API requirements
+		// For now, we'll leave it empty as ConnectionMap handling might need specific logic
+		updateReq.ConnectionMap = connectionMap
+	}
+
+	return c.CreateOrUpdate(ctx, updateReq)
+}
diff --git a/pkg/rownd/user_test.go b/pkg/rownd/user_test.go
index 32f4d78..54488c8 100644
--- a/pkg/rownd/user_test.go
+++ b/pkg/rownd/user_test.go
@@ -171,4 +171,118 @@ func TestRowndUserOperations(t *testing.T) {
 		})
 		assert.NoError(t, err)
 	})
+
+	t.Run("user attributes operations", func(t *testing.T) {
+		// Create a user for attribute testing
+		userData := map[string]interface{}{
+			"email":      fmt.Sprintf("test.attributes.%d@example.com", time.Now().UnixNano()),
+			"first_name": "Attribute",
+			"last_name":  "Test",
+		}
+
+		user, err := client.Users.CreateOrUpdate(ctx, rownd.CreateOrUpdateUserRequest{
+			UserID: "__UUID__",
+			Data:   userData,
+			Attributes: map[string][]string{
+				"rownd:app_variants": {"variant_1", "variant_2"},
+			},
+		})
+		assert.NoError(t, err)
+		assert.NotNil(t, user)
+		assert.NotEmpty(t, user.ID)
+		testUserID := user.ID
+
+		// Test GetAttributes method
+		attrs := user.GetAttributes()
+		assert.NotNil(t, attrs)
+		assert.Equal(t, []string{"variant_1", "variant_2"}, attrs["rownd:app_variants"])
+
+		// Test AddAttributes
+		t.Run("add attributes", func(t *testing.T) {
+			user, err := client.Users.AddAttributes(ctx, rownd.AddAttributesRequest{
+				UserID: testUserID,
+				Attributes: map[string][]string{
+					"myapp:subscription_status": {"active"},
+					"myapp:loyalty_points":      {"100"},
+				},
+			})
+			assert.NoError(t, err)
+			assert.NotNil(t, user)
+
+			// Verify attributes were added
+			attrs := user.GetAttributes()
+			assert.Equal(t, []string{"variant_1", "variant_2"}, attrs["rownd:app_variants"])
+			assert.Equal(t, []string{"active"}, attrs["myapp:subscription_status"])
+			assert.Equal(t, []string{"100"}, attrs["myapp:loyalty_points"])
+		})
+
+		// Test updating existing attributes
+		t.Run("update existing attributes", func(t *testing.T) {
+			user, err := client.Users.AddAttributes(ctx, rownd.AddAttributesRequest{
+				UserID: testUserID,
+				Attributes: map[string][]string{
+					"myapp:loyalty_points": {"200"},  // Update existing
+					"myapp:tier":           {"gold"}, // Add new
+				},
+			})
+			assert.NoError(t, err)
+			assert.NotNil(t, user)
+
+			attrs := user.GetAttributes()
+			assert.Equal(t, []string{"200"}, attrs["myapp:loyalty_points"])
+			assert.Equal(t, []string{"gold"}, attrs["myapp:tier"])
+		})
+
+		// Test DeleteAttributes
+		t.Run("delete attributes", func(t *testing.T) {
+			user, err := client.Users.DeleteAttributes(ctx, rownd.DeleteAttributesRequest{
+				UserID:        testUserID,
+				AttributeKeys: []string{"myapp:subscription_status", "myapp:tier"},
+			})
+			assert.NoError(t, err)
+			assert.NotNil(t, user)
+
+			// Verify attributes were deleted
+			attrs := user.GetAttributes()
+			assert.Equal(t, []string{"variant_1", "variant_2"}, attrs["rownd:app_variants"])
+			assert.Equal(t, []string{"200"}, attrs["myapp:loyalty_points"])
+			_, hasSubscription := attrs["myapp:subscription_status"]
+			assert.False(t, hasSubscription)
+			_, hasTier := attrs["myapp:tier"]
+			assert.False(t, hasTier)
+		})
+
+		// Test validation errors
+		t.Run("validation errors", func(t *testing.T) {
+			// Test AddAttributes without UserID
+			_, err := client.Users.AddAttributes(ctx, rownd.AddAttributesRequest{
+				Attributes: map[string][]string{"test": {"value"}},
+			})
+			assert.Error(t, err)
+
+			// Test AddAttributes without attributes
+			_, err = client.Users.AddAttributes(ctx, rownd.AddAttributesRequest{
+				UserID: testUserID,
+			})
+			assert.Error(t, err)
+
+			// Test DeleteAttributes without UserID
+			_, err = client.Users.DeleteAttributes(ctx, rownd.DeleteAttributesRequest{
+				AttributeKeys: []string{"test"},
+			})
+			assert.Error(t, err)
+
+			// Test DeleteAttributes without keys
+			_, err = client.Users.DeleteAttributes(ctx, rownd.DeleteAttributesRequest{
+				UserID: testUserID,
+			})
+			assert.Error(t, err)
+		})
+
+		// Cleanup
+		err = client.Users.Delete(ctx, rownd.DeleteUserRequest{
+			UserID: testUserID,
+		})
+		assert.NoError(t, err)
+	})
 }