--- a/source/common/common/posix/thread_impl.cc
+++ b/source/common/common/posix/thread_impl.cc
@@ -10,6 +10,9 @@
 #if defined(__linux__)
 #include <sys/resource.h>
 #include <sys/syscall.h>
+#elif defined(__FreeBSD__)
+#include <sys/resource.h>
+#include <pthread_np.h>
 #elif defined(__APPLE__)
 #include <objc/message.h>
 #include <objc/runtime.h>
@@ -27,6 +30,8 @@ int64_t getCurrentThreadIdBase() {
   uint64_t tid;
   pthread_threadid_np(nullptr, &tid);
   return tid;
+#elif defined(__FreeBSD__)
+  return static_cast<int64_t>(pthread_getthreadid_np());
 #else
 #error "Enable and test pthread id retrieval code for you arch in pthread/thread_impl.cc"
 #endif
@@ -45,6 +50,11 @@ void setThreadPriority(const int64_t tid, const int priority) {
   if (rc != 0) {
     ENVOY_LOG_MISC(warn, "failed to set thread priority: {}", Envoy::errorDetails(errno));
   }
+#elif defined(__FreeBSD__)
+  const int rcf = setpriority(PRIO_PROCESS, tid, priority);
+  if (rcf != 0) {
+    ENVOY_LOG_MISC(warn, "failed to set thread priority: {}", Envoy::errorDetails(errno));
+  }
 #elif defined(__APPLE__)
   UNREFERENCED_PARAMETER(tid);
   // Use NSThread via the Objective-C runtime to set the thread priority; it's the best way to set
@@ -140,6 +150,8 @@ ThreadId PosixThread::pthreadId() const {
   ASSERT(!joined_);
 #if defined(__linux__)
   return ThreadId(static_cast<int64_t>(thread_handle_->handle()));
+#elif defined(__FreeBSD__)
+  return ThreadId(reinterpret_cast<int64_t>(pthread_self()));
 #elif defined(__APPLE__)
   uint64_t tid;
   pthread_threadid_np(thread_handle_->handle(), &tid);
@@ -203,6 +215,8 @@ int PosixThreadFactory::currentThreadPriority() const {
 int PosixThreadFactory::currentThreadPriority() const {
 #if defined(__linux__)
   return static_cast<double>(getpriority(PRIO_PROCESS, getCurrentThreadId()));
+#elif defined(__FreeBSD__)
+  return static_cast<int>(getpriority(PRIO_PROCESS, getCurrentThreadId()));
 #elif defined(__APPLE__)
   Class nsthread = objc_getClass("NSThread");
   SEL selector = sel_registerName("threadPriority");
@@ -218,6 +232,8 @@ ThreadId PosixThreadFactory::currentPthreadId() const {
 ThreadId PosixThreadFactory::currentPthreadId() const {
 #if defined(__linux__)
   return static_cast<ThreadId>(static_cast<int64_t>(pthread_self()));
+#elif defined(__FreeBSD__)
+  return static_cast<ThreadId>(reinterpret_cast<int64_t>(pthread_self()));
 #elif defined(__APPLE__)
   uint64_t tid;
   pthread_threadid_np(pthread_self(), &tid);