diff --git a/esphome/components/sha256/sha256.cpp b/esphome/components/sha256/sha256.cpp
index cf3cfb1a30..71e4045499 100644
--- a/esphome/components/sha256/sha256.cpp
+++ b/esphome/components/sha256/sha256.cpp
@@ -1,4 +1,8 @@
 #include "sha256.h"
+
+// Only compile SHA256 implementation on platforms that support it
+#if defined(USE_ESP32) || defined(USE_ESP8266) || defined(USE_RP2040) || defined(USE_LIBRETINY)
+
 #include "esphome/core/helpers.h"
 #include <cstring>
 
@@ -142,3 +146,5 @@ bool SHA256::equals_hex(const char *expected) {
 }
 
 }  // namespace esphome::sha256
+
+#endif  // Platform check
diff --git a/esphome/components/sha256/sha256.h b/esphome/components/sha256/sha256.h
index 5f56d7542a..2a7aa72183 100644
--- a/esphome/components/sha256/sha256.h
+++ b/esphome/components/sha256/sha256.h
@@ -1,6 +1,10 @@
 #pragma once
 
 #include "esphome/core/defines.h"
+
+// Only define SHA256 on platforms that support it
+#if defined(USE_ESP32) || defined(USE_ESP8266) || defined(USE_RP2040) || defined(USE_LIBRETINY)
+
 #include <cstdint>
 #include <string>
 #include <memory>
@@ -59,3 +63,5 @@ class SHA256 {
 };
 
 }  // namespace esphome::sha256
+
+#endif  // Platform check