diff --git a/app/assets/javascripts/discourse/app/controllers/review-index.js b/app/assets/javascripts/discourse/app/controllers/review-index.js
index a910f5aa33e..8e9825857cf 100644
--- a/app/assets/javascripts/discourse/app/controllers/review-index.js
+++ b/app/assets/javascripts/discourse/app/controllers/review-index.js
@@ -19,6 +19,7 @@ export default class ReviewIndexController extends Controller {
     "to_date",
     "sort_order",
     "additional_filters",
+    "flagged_by",
   ];
 
   type = null;
@@ -30,6 +31,7 @@ export default class ReviewIndexController extends Controller {
   filtersExpanded = this.site.desktopView;
   username = "";
   reviewed_by = "";
+  flagged_by = "";
   from_date = null;
   to_date = null;
   sort_order = null;
@@ -161,6 +163,7 @@ export default class ReviewIndexController extends Controller {
       category_id: this.filterCategoryId,
       username: this.filterUsername,
       reviewed_by: this.filterReviewedBy,
+      flagged_by: this.filterFlaggedBy,
       from_date: isPresent(this.filterFromDate)
         ? this.filterFromDate.toISOString(true).split("T")[0]
         : null,
@@ -189,6 +192,11 @@ export default class ReviewIndexController extends Controller {
     this.set("filterReviewedBy", selected.firstObject);
   }
 
+  @action
+  updateFilterFlaggedBy(selected) {
+    this.set("filterFlaggedBy", selected.firstObject);
+  }
+
   @action
   updateFilterUsername(selected) {
     this.set("filterUsername", selected.firstObject);
diff --git a/app/assets/javascripts/discourse/app/routes/review-index.js b/app/assets/javascripts/discourse/app/routes/review-index.js
index f3cbe350bdf..81c27cb951d 100644
--- a/app/assets/javascripts/discourse/app/routes/review-index.js
+++ b/app/assets/javascripts/discourse/app/routes/review-index.js
@@ -41,6 +41,7 @@ export default class ReviewIndex extends DiscourseRoute {
       reviewableTypes: meta.reviewable_types,
       filterUsername: meta.username,
       filterReviewedBy: meta.reviewed_by,
+      filterFlaggedBy: meta.flagged_by,
       filterFromDate: isPresent(meta.from_date) ? moment(meta.from_date) : null,
       filterToDate: isPresent(meta.to_date) ? moment(meta.to_date) : null,
       filterSortOrder: meta.sort_order,
diff --git a/app/assets/javascripts/discourse/app/templates/review-index.hbs b/app/assets/javascripts/discourse/app/templates/review-index.hbs
index d74e4babcba..368efefc7d1 100644
--- a/app/assets/javascripts/discourse/app/templates/review-index.hbs
+++ b/app/assets/javascripts/discourse/app/templates/review-index.hbs
@@ -75,6 +75,21 @@
         />
       </div>
 
+      <div class="reviewable-filter topic-filter">
+        <label class="filter-label">
+          {{i18n "review.filtered_flagged_by"}}
+        </label>
+        <EmailGroupUserChooser
+          @value={{this.filterFlaggedBy}}
+          @onChange={{action "updateFilterFlaggedBy"}}
+          @options={{hash
+            maximum=1
+            excludeCurrentUser=false
+            fullWidthWrap=true
+          }}
+        />
+      </div>
+
       <div class="reviewable-filter topic-filter">
         <label class="filter-label">
           {{i18n "review.filtered_reviewed_by"}}
diff --git a/app/controllers/reviewables_controller.rb b/app/controllers/reviewables_controller.rb
index ced8d1f215d..4b63b98b9bd 100644
--- a/app/controllers/reviewables_controller.rb
+++ b/app/controllers/reviewables_controller.rb
@@ -32,9 +32,16 @@ class ReviewablesController < ApplicationController
       additional_filters: additional_filters.reject { |_, v| v.blank? },
     }
 
-    %i[priority username reviewed_by from_date to_date type sort_order].each do |filter_key|
-      filters[filter_key] = params[filter_key]
-    end
+    %i[
+      priority
+      username
+      reviewed_by
+      from_date
+      to_date
+      type
+      sort_order
+      flagged_by
+    ].each { |filter_key| filters[filter_key] = params[filter_key] }
 
     total_rows = Reviewable.list_for(current_user, **filters).count
     reviewables =
diff --git a/app/models/reviewable.rb b/app/models/reviewable.rb
index a9e957b7f34..eb4e10ffbfc 100644
--- a/app/models/reviewable.rb
+++ b/app/models/reviewable.rb
@@ -448,7 +448,8 @@ class Reviewable < ActiveRecord::Base
     to_date: nil,
     additional_filters: {},
     preload: true,
-    include_claimed_by_others: true
+    include_claimed_by_others: true,
+    flagged_by: nil
   )
     order =
       case sort_order
@@ -466,19 +467,28 @@ class Reviewable < ActiveRecord::Base
       user_id = User.find_by_username(username)&.id
       return none if user_id.blank?
     end
-
     return none if user.blank?
-    result = viewable_by(user, order: order, preload: preload)
 
+    result = viewable_by(user, order: order, preload: preload)
     result = by_status(result, status)
     result = result.where(id: ids) if ids
-
     result = result.where("reviewables.type = ?", Reviewable.sti_class_for(type).sti_name) if type
     result = result.where("reviewables.category_id = ?", category_id) if category_id
     result = result.where("reviewables.topic_id = ?", topic_id) if topic_id
     result = result.where("reviewables.created_at >= ?", from_date) if from_date
     result = result.where("reviewables.created_at <= ?", to_date) if to_date
 
+    if flagged_by
+      flagged_by_id = User.find_by_username(flagged_by)&.id
+      return none if flagged_by_id.nil?
+      result = result.where(<<~SQL, flagged_by_id: flagged_by_id)
+        EXISTS(
+          SELECT 1 FROM reviewable_scores
+          WHERE reviewable_scores.reviewable_id = reviewables.id AND reviewable_scores.user_id = :flagged_by_id
+        )
+      SQL
+    end
+
     if reviewed_by
       reviewed_by_id = User.find_by_username(reviewed_by)&.id
       return none if reviewed_by_id.nil?
diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index bf9f77620f8..2fe29da1ed3 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -573,6 +573,7 @@ en:
       order_by: "Order by"
       date_filter: "Posted between"
       in_reply_to: "in reply to"
+      filtered_flagged_by: "Flagged by"
       explain:
         why: "explain why this item ended up in the queue"
         title: "Reviewable Scoring"
diff --git a/spec/requests/reviewables_controller_spec.rb b/spec/requests/reviewables_controller_spec.rb
index 26b7e9f23f7..162a33f2c34 100644
--- a/spec/requests/reviewables_controller_spec.rb
+++ b/spec/requests/reviewables_controller_spec.rb
@@ -75,6 +75,31 @@ RSpec.describe ReviewablesController do
         expect(json["meta"]["status"]).to eq("pending")
       end
 
+      it "supports filtering by flagged_by" do
+        # this is not flagged by the user
+        reviewable = Fabricate(:reviewable)
+        reviewable.reviewable_scores.create!(
+          user: admin,
+          score: 1000,
+          status: "pending",
+          reviewable_score_type: 1,
+        )
+
+        reviewable = Fabricate(:reviewable)
+        user = Fabricate(:user)
+        reviewable.reviewable_scores.create!(
+          user: user,
+          score: 1000,
+          status: "pending",
+          reviewable_score_type: 1,
+        )
+
+        get "/review.json?flagged_by=#{user.username}"
+        expect(response.code).to eq("200")
+        json = response.parsed_body
+        expect(json["reviewables"].length).to eq(1)
+      end
+
       it "supports filtering by score" do
         get "/review.json?min_score=1000"
         expect(response.code).to eq("200")
@@ -216,7 +241,7 @@ RSpec.describe ReviewablesController do
         let(:reviewables) { response.parsed_body["reviewables"] }
 
         it "returns an empty array when no reviewable matches the date range" do
-          reviewable = Fabricate(:reviewable)
+          Fabricate(:reviewable)
 
           get "/review.json?from_date=#{from}&to_date=#{to}"
 
@@ -269,7 +294,7 @@ RSpec.describe ReviewablesController do
 
       it "supports filtering by id" do
         reviewable_a = Fabricate(:reviewable)
-        reviewable_b = Fabricate(:reviewable)
+        _reviewable_b = Fabricate(:reviewable)
 
         get "/review.json?ids[]=#{reviewable_a.id}"
 
@@ -323,7 +348,7 @@ RSpec.describe ReviewablesController do
       end
 
       it "responds with current user's reviewables count" do
-        reviewable = Fabricate(:reviewable)
+        _reviewable = Fabricate(:reviewable)
 
         get "/review/user-menu-list.json"
 
@@ -497,7 +522,7 @@ RSpec.describe ReviewablesController do
       end
 
       it "doesn't send email when `send_email` is false" do
-        other_reviewable = Fabricate(:reviewable)
+        _other_reviewable = Fabricate(:reviewable)
 
         SiteSetting.must_approve_users = true
         put "/review/#{reviewable.id}/perform/approve_user.json?version=#{reviewable.version}&send_email=false"