diff --git a/app/models/product_drive_participant.rb b/app/models/product_drive_participant.rb
index dd2d1c656e..49967628a6 100644
--- a/app/models/product_drive_participant.rb
+++ b/app/models/product_drive_participant.rb
@@ -30,7 +30,27 @@ class ProductDriveParticipant < ApplicationRecord
   validates :business_name, presence: { message: "Must provide a name or a business name" }, if: proc { |pdp| pdp.contact_name.blank? }
   validates :comment, length: { maximum: 500 }
 
-  scope :alphabetized, -> { order(:contact_name) }
+  # Orders on the name the drop-downs actually show - `display_name`, which is
+  # `business_name` falling back to `contact_name` - rather than on the database
+  # collation, which is not the same everywhere: a `C.UTF-8` cluster puts every
+  # capitalised name before every lowercase one and the `en_US.utf8` image CI
+  # runs does not. Runs of digits are zero padded so that they compare by value
+  # and "Store 9" comes before "Store 10".
+  #
+  # Written as a literal because the schema is maintained as `schema.rb`, which
+  # carries neither a Postgres function nor an ICU collation - both would
+  # disappear on `db:schema:load`.
+  DISPLAY_NAME_ORDER = Arel.sql(<<~SQL.squish)
+    (SELECT string_agg(
+              CASE WHEN chunk[1] ~ '^[0-9]' THEN lpad(chunk[1], 20, '0') ELSE chunk[1] END,
+              '' ORDER BY idx)
+       FROM regexp_matches(
+              lower(coalesce(NULLIF(business_name, ''), contact_name, '')),
+              '[0-9]+|[^0-9]+', 'g')
+       WITH ORDINALITY AS chunks(chunk, idx))
+  SQL
+
+  scope :alphabetized, -> { order(DISPLAY_NAME_ORDER) }
   scope :by_business_name, ->(business_name) { where("business_name ILIKE ?", "%#{business_name}%") }
   scope :by_contact_name, ->(contact_name) { where("contact_name ILIKE ?", "%#{contact_name}%") }
   scope :with_volumes, -> {
diff --git a/app/views/donations/_donation_form.html.erb b/app/views/donations/_donation_form.html.erb
index fde46484ac..b43993fdbe 100644
--- a/app/views/donations/_donation_form.html.erb
+++ b/app/views/donations/_donation_form.html.erb
@@ -43,7 +43,7 @@
                           collection: @product_drive_participants,
                           selected: donation_form.product_drive_participant_id,
                           include_blank: true,
-                          label_method: lambda { |x| "#{x.try(:business_name).presence || x.try(:contact_name)}" },
+                          label_method: :display_name,
                           label: "Product Drive Participant",
                           error: "Which product drive participant was this from?",
                           wrapper: :input_group %>
diff --git a/app/views/donations/index.html.erb b/app/views/donations/index.html.erb
index f128e67b9d..8cb16e204d 100644
--- a/app/views/donations/index.html.erb
+++ b/app/views/donations/index.html.erb
@@ -65,7 +65,7 @@
                   <div class="form-group col-lg-3 col-md-4 col-sm-6 col-xs-12">
                     <%= filter_select(scope: :by_product_drive_participant,
                                       collection: @donation_info.product_drive_participants,
-                                      value: :business_name,
+                                      value: :display_name,
                                       selected: @donation_info.selected_product_drive_participant) %>
                   </div>
                 <% end %>
diff --git a/app/views/product_drive_participants/create.js.erb b/app/views/product_drive_participants/create.js.erb
index 9f291950f7..66b7cb9e8c 100644
--- a/app/views/product_drive_participants/create.js.erb
+++ b/app/views/product_drive_participants/create.js.erb
@@ -2,6 +2,6 @@
 $("#modal_new").modal("hide");
 $("#donation_product_drive_participant_id").empty();
 $("#donation_product_drive_participant_id").
-html('<%= j options_from_collection_for_select(current_organization.product_drive_participants, :id, lambda { |p| p.business_name.present? ? p.business_name : p.contact_name }) %>');
+html('<%= j options_from_collection_for_select(current_organization.product_drive_participants.alphabetized, :id, :display_name) %>');
 $("#donation_product_drive_participant_id").append('<option value="">---Create new Participant---</option>');
 $("#donation_product_drive_participant_id").val('<%= @product_drive_participant[:id] %>');
diff --git a/spec/models/product_drive_participant_spec.rb b/spec/models/product_drive_participant_spec.rb
index 6f6c08e6a2..55d7b0fc42 100644
--- a/spec/models/product_drive_participant_spec.rb
+++ b/spec/models/product_drive_participant_spec.rb
@@ -71,6 +71,24 @@
         expect(ProductDriveParticipant.by_contact_name("Shellstrop")).to match_array([eleanor, donna])
       end
     end
+
+    describe ".alphabetized" do
+      it "orders by the name that is displayed, falling back to contact name" do
+        zebra = create(:product_drive_participant, business_name: "Zebra Foods", contact_name: "adam")
+        no_business = create(:product_drive_participant, business_name: nil, contact_name: "molly")
+        aardvark = create(:product_drive_participant, business_name: "Aardvark Supplies", contact_name: "zoe")
+
+        expect(ProductDriveParticipant.alphabetized).to eq([aardvark, no_business, zebra])
+      end
+
+      it "orders numbers by value rather than by digit" do
+        tenth = create(:product_drive_participant, business_name: "Store 10")
+        second = create(:product_drive_participant, business_name: "Store 2")
+        ninth = create(:product_drive_participant, business_name: "Store 9")
+
+        expect(ProductDriveParticipant.alphabetized).to eq([second, ninth, tenth])
+      end
+    end
   end
 
   context "Methods" do