diff --git a/.github/workflows/build-cityseer.yml b/.github/workflows/build-cityseer.yml
new file mode 100644
index 000000000000..54a996c8e0cb
--- /dev/null
+++ b/.github/workflows/build-cityseer.yml
@@ -0,0 +1,117 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on the `linux` job of
+# https://github.com/benchmark-urbanism/cityseer-api/blob/v5.8.0/.github/workflows/publish_package.yml
+name: Build cityseer wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version glob to (re)build; empty builds every version of docs/packages/cityseer.yaml not released yet'
+        required: false
+        default: ''
+  pull_request:
+    branches: [main]
+    paths:
+      - '.github/workflows/build-cityseer.yml'
+      - 'docs/packages/cityseer.yaml'
+  push:
+    branches: [main]
+    paths:
+      - '.github/workflows/build-cityseer.yml'
+      - 'docs/packages/cityseer.yaml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read  # to fetch code (actions/checkout)
+
+env:
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+    with:
+      package: cityseer
+      version: ${{ inputs.version }}
+
+  build_wheels:
+    needs: [setup]
+    if: needs.setup.outputs.versions != '[]'
+    name: Build cityseer ${{ matrix.version }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 120
+    strategy:
+      fail-fast: false
+      matrix:
+        version: ${{ fromJSON(needs.setup.outputs.versions) }}
+        # cityseer's pyo3 dependency carries no abi3-pyNN feature, matching
+        # upstream's own per-interpreter wheel matrix. Upstream builds no
+        # free-threaded wheel, so cp314t is dropped; cp314 is dropped too --
+        # statsmodels (a runtime dependency) has no riscv64 wheel for it yet.
+        python: ['cp312', 'cp313']
+
+    env:
+      CITYSEER_VERSION: ${{ matrix.version }}
+
+    steps:
+      - name: Checkout cityseer v${{ env.CITYSEER_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: benchmark-urbanism/cityseer-api
+          ref: v${{ env.CITYSEER_VERSION }}
+          persist-credentials: false
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          output-dir: wheelhouse/
+          only: ${{ matrix.python }}-manylinux_riscv64
+        env:
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # cityseer ships no [tool.cibuildwheel], so the Rust toolchain its
+          # maturin backend needs is installed in-container here.
+          CIBW_BEFORE_ALL_LINUX: >-
+            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+          CIBW_ENVIRONMENT_LINUX: >-
+            PATH="$PATH:$HOME/.cargo/bin"
+            PIP_EXTRA_INDEX_URL=https://pypi.riseproject.dev/simple/
+            PIP_ONLY_BINARY=:all:
+          # Upstream's own `check` job: run the pytest suite (minus the
+          # performance benchmarks pyproject.toml's addopts already ignores --
+          # `cd` into {package} first so cwd matches rootdir and that addopts
+          # is actually read. The Overpass-API network test upstream's own
+          # suite carries self-skips under GITHUB_ACTIONS.
+          # pyarrow is an optional geopandas dependency upstream's own dev
+          # group pulls in transitively (via overturemaps); CityNetwork.save()
+          # needs it directly and we already ship a riscv64 wheel for it.
+          CIBW_TEST_REQUIRES: pytest pyarrow
+          CIBW_TEST_COMMAND: cd {package} && pytest tests -v
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: cityseer-${{ env.CITYSEER_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish cityseer ${{ matrix.version }}
+    needs: [setup, build_wheels]
+    if: needs.setup.outputs.versions != '[]'
+    strategy:
+      fail-fast: false
+      matrix:
+        version: ${{ fromJSON(needs.setup.outputs.versions) }}
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    secrets:
+      app-private-key: ${{ secrets.RISEPROJECT_APP_PRIVATE_KEY }}
+    with:
+      artifact-pattern: cityseer-${{ matrix.version }}-*-manylinux_riscv64
diff --git a/docs/packages/cityseer.yaml b/docs/packages/cityseer.yaml
new file mode 100644
index 000000000000..87430bbeb8f7
--- /dev/null
+++ b/docs/packages/cityseer.yaml
@@ -0,0 +1,5 @@
+package-name: cityseer
+source-code: https://github.com/benchmark-urbanism/cityseer-api
+license: AGPL-3.0
+versions:
+- version: 5.8.0