diff --git a/cpp/cmake_modules/ThirdpartyToolchain.cmake b/cpp/cmake_modules/ThirdpartyToolchain.cmake
index 92ea7e346f986..2cca9cd4b400b 100644
--- a/cpp/cmake_modules/ThirdpartyToolchain.cmake
+++ b/cpp/cmake_modules/ThirdpartyToolchain.cmake
@@ -607,8 +607,6 @@ else()
            # our currently used packages and doesn't fall out of sync with
            # ${ARROW_BOOST_BUILD_VERSION_UNDERSCORES}
            "${THIRDPARTY_MIRROR_URL}/boost_${ARROW_BOOST_BUILD_VERSION_UNDERSCORES}.tar.gz"
-           "https://boostorg.jfrog.io/artifactory/main/release/${ARROW_BOOST_BUILD_VERSION}/source/boost_${ARROW_BOOST_BUILD_VERSION_UNDERSCORES}.tar.gz"
-           "https://sourceforge.net/projects/boost/files/boost/${ARROW_BOOST_BUILD_VERSION}/boost_${ARROW_BOOST_BUILD_VERSION_UNDERSCORES}.tar.gz"
   )
 endif()