diff --git a/ports/libdeflate/CONTROL b/ports/libdeflate/CONTROL
new file mode 100644
index 00000000000000..970b620cc6a133
--- /dev/null
+++ b/ports/libdeflate/CONTROL
@@ -0,0 +1,4 @@
+Source: libdeflate
+Version: 1.5
+Homepage: https://github.com/ebiggers/libdeflate
+Description: Heavily optimized library for DEFLATE/zlib/gzip compression and decompression
diff --git a/ports/libdeflate/makefile.patch b/ports/libdeflate/makefile.patch
new file mode 100644
index 00000000000000..ee31befa385813
--- /dev/null
+++ b/ports/libdeflate/makefile.patch
@@ -0,0 +1,31 @@
+diff --git a/Makefile.msc b/Makefile.msc
+index 901131d..00f0568 100644
+--- a/Makefile.msc
++++ b/Makefile.msc
+@@ -10,7 +10,7 @@
+ CC = cl
+ LD = link
+ AR = lib
+-CFLAGS = /MD /O2 -I. -Icommon
++CFLAGS = $(CL_FLAGS) -I. -Icommon
+ LDFLAGS =
+ 
+ STATIC_LIB = libdeflatestatic.lib
+@@ -60,6 +60,14 @@ gunzip.exe:gzip.exe
+ 	copy $** $@
+ 
+ clean:
+-	-del *.dll *.exe *.exp libdeflate.lib libdeflatestatic.lib gzip.lib \
+-		lib\*.obj lib\*\*.obj lib\*.dllobj lib\*\*.dllobj \
+-		programs\*.obj 2>nul
++	-del /s /q *.dll *.exe *.exp libdeflate.lib libdeflatestatic.lib gzip.lib \
++		lib\*.obj lib\*.dllobj \
++		programs\*.obj
++
++install: all
++	-xcopy /i /y "gzip.exe" "$(INSTALLDIR)/bin\"
++	-xcopy /i /y "gunzip.exe" "$(INSTALLDIR)/bin\"
++	-xcopy /i /y "$(SHARED_LIB)" "$(INSTALLDIR)/bin\"
++	-xcopy /i /y "$(STATIC_LIB)" "$(INSTALLDIR)/lib\"
++	-xcopy /i /y "$(IMPORT_LIB)" "$(INSTALLDIR)/lib\"
++	-xcopy /i /y "libdeflate.h" "$(INSTALLDIR)/include\"
diff --git a/ports/libdeflate/portfile.cmake b/ports/libdeflate/portfile.cmake
new file mode 100644
index 00000000000000..d24a78d659ea3f
--- /dev/null
+++ b/ports/libdeflate/portfile.cmake
@@ -0,0 +1,54 @@
+vcpkg_fail_port_install(ON_TARGET "Linux" "OSX" "UWP")
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO ebiggers/libdeflate
+    REF v1.5
+    SHA512 8e86e87733bb1b2b2d4dda6ce0be96b57a125776c1f81804d5fc6f51516dd52796d9bb800ca4044c637963136ae390cfaf5cd804e9ae8b5d93d36853d0e807f6
+    HEAD_REF master
+    PATCHES
+        makefile.patch
+)
+
+vcpkg_install_nmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    PROJECT_NAME Makefile.msc
+)
+
+if(NOT DEFINED VCPKG_BUILD_TYPE OR VCPKG_BUILD_TYPE STREQUAL "debug")
+    file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
+
+    file(COPY ${CURRENT_PACKAGES_DIR}/debug/bin/gzip.exe DESTINATION ${CURRENT_PACKAGES_DIR}/debug/tools/${PORT})
+    file(COPY ${CURRENT_PACKAGES_DIR}/debug/bin/gunzip.exe DESTINATION ${CURRENT_PACKAGES_DIR}/debug/tools/${PORT})
+
+    file(REMOVE ${CURRENT_PACKAGES_DIR}/debug/bin/gzip.exe)
+    file(REMOVE ${CURRENT_PACKAGES_DIR}/debug/bin/gunzip.exe)
+
+    if (VCPKG_LIBRARY_LINKAGE STREQUAL "dynamic")
+        file(REMOVE ${CURRENT_PACKAGES_DIR}/debug/lib/libdeflatestatic.lib)
+    elseif (VCPKG_LIBRARY_LINKAGE STREQUAL "static")
+        file(REMOVE ${CURRENT_PACKAGES_DIR}/debug/lib/libdeflate.lib)
+        file(RENAME ${CURRENT_PACKAGES_DIR}/debug/lib/libdeflatestatic.lib ${CURRENT_PACKAGES_DIR}/debug/lib/libdeflate.lib)
+        file(REMOVE ${CURRENT_PACKAGES_DIR}/debug/bin/libdeflate.dll)
+        file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/bin)
+    endif()
+endif()
+
+if(NOT DEFINED VCPKG_BUILD_TYPE OR VCPKG_BUILD_TYPE STREQUAL "release")
+    file(COPY ${CURRENT_PACKAGES_DIR}/bin/gzip.exe DESTINATION ${CURRENT_PACKAGES_DIR}/tools/${PORT})
+    file(COPY ${CURRENT_PACKAGES_DIR}/bin/gunzip.exe DESTINATION ${CURRENT_PACKAGES_DIR}/tools/${PORT})
+
+    file(REMOVE ${CURRENT_PACKAGES_DIR}/bin/gzip.exe)
+    file(REMOVE ${CURRENT_PACKAGES_DIR}/bin/gunzip.exe)
+
+    if (VCPKG_LIBRARY_LINKAGE STREQUAL "dynamic")
+        file(REMOVE ${CURRENT_PACKAGES_DIR}/lib/libdeflatestatic.lib)
+    elseif (VCPKG_LIBRARY_LINKAGE STREQUAL "static")
+        file(REMOVE ${CURRENT_PACKAGES_DIR}/lib/libdeflate.lib)
+        file(RENAME ${CURRENT_PACKAGES_DIR}/lib/libdeflatestatic.lib ${CURRENT_PACKAGES_DIR}/lib/libdeflate.lib)
+        file(REMOVE ${CURRENT_PACKAGES_DIR}/bin/libdeflate.dll)
+        file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/bin)
+    endif()
+endif()
+
+file(INSTALL ${SOURCE_PATH}/COPYING DESTINATION ${CURRENT_PACKAGES_DIR}/share/${PORT} RENAME copyright)
diff --git a/scripts/ci.baseline.txt b/scripts/ci.baseline.txt
index d40cdb2284e47d..e57327c9591154 100644
--- a/scripts/ci.baseline.txt
+++ b/scripts/ci.baseline.txt
@@ -693,6 +693,10 @@ libcopp:arm-uwp=fail
 libcopp:x64-windows-static=fail
 libdatrie:x64-linux=fail
 libdatrie:x64-osx=fail
+libdeflate:x64-linux=fail
+libdeflate:x64-osx=fail
+libdeflate:x64-uwp=fail
+libdeflate:arm-uwp=fail
 libdisasm:arm-uwp=fail
 libdisasm:x64-uwp=fail
 libdshowcapture:arm64-windows=fail