diff --git a/ports/tiny-bignum-c/CMakeLists.txt b/ports/tiny-bignum-c/CMakeLists.txt
new file mode 100644
index 0000000000..8891356d7b
--- /dev/null
+++ b/ports/tiny-bignum-c/CMakeLists.txt
@@ -0,0 +1,28 @@
+cmake_minimum_required(VERSION 3.14)
+
+project(tiny-bignum-c LANGUAGES C)
+
+include(GNUInstallDirs)
+
+add_library(tiny-bignum-c bn.c)
+
+target_include_directories(
+    tiny-bignum-c
+    PUBLIC
+        $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+target_compile_definitions(
+    tiny-bignum-c
+    PRIVATE
+        $<$<C_COMPILER_ID:MSVC>:_CRT_SECURE_NO_WARNINGS>
+)
+set_target_properties(tiny-bignum-c PROPERTIES PUBLIC_HEADER bn.h)
+
+install(TARGETS tiny-bignum-c EXPORT unofficial-tiny-bignum-c-config)
+
+install(
+    EXPORT unofficial-tiny-bignum-c-config
+    NAMESPACE unofficial::tiny-bignum-c::
+    DESTINATION share/unofficial-tiny-bignum-c
+    PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
+)
diff --git a/ports/tiny-bignum-c/CONTROL b/ports/tiny-bignum-c/CONTROL
new file mode 100644
index 0000000000..5015bc2d07
--- /dev/null
+++ b/ports/tiny-bignum-c/CONTROL
@@ -0,0 +1,4 @@
+Source: tiny-bignum-c
+Version: 2019-07-31
+Description: Small portable multiple-precision unsigned integer arithmetic in C
+Homepage: https://github.com/kokke/tiny-bignum-c
diff --git a/ports/tiny-bignum-c/portfile.cmake b/ports/tiny-bignum-c/portfile.cmake
new file mode 100644
index 0000000000..732271241d
--- /dev/null
+++ b/ports/tiny-bignum-c/portfile.cmake
@@ -0,0 +1,30 @@
+include(vcpkg_common_functions)
+
+vcpkg_check_linkage(ONLY_STATIC_LIBRARY)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO kokke/tiny-bignum-c
+    REF e814d2b6b522ecaa67701453c492811a8adbc555
+    SHA512 2cea21588d018bd74fb9a128576764feecd87364d157acee21bd37cd8890c0776b228e25580de88a0c6d723a7b8e88cb8120c8c66b3999661c707b04dffc3f5b
+    HEAD_REF master
+)
+
+file(COPY ${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt DESTINATION ${SOURCE_PATH})
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    PREFER_NINJA
+)
+
+vcpkg_install_cmake()
+
+vcpkg_fixup_cmake_targets(CONFIG_PATH share/unofficial-${PORT} TARGET_PATH share/unofficial-${PORT})
+
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
+
+# Handle copyright
+configure_file(${SOURCE_PATH}/LICENSE ${CURRENT_PACKAGES_DIR}/share/${PORT}/copyright COPYONLY)
+
+# CMake integration test
+vcpkg_test_cmake(PACKAGE_NAME unofficial-${PORT})