diff --git a/.changeset/moody-pants-laugh.md b/.changeset/moody-pants-laugh.md
new file mode 100644
index 00000000000..640ba1b9ab6
--- /dev/null
+++ b/.changeset/moody-pants-laugh.md
@@ -0,0 +1,8 @@
+---
+"@remix-run/dev": major
+"@remix-run/react": major
+---
+
+remove deprecated REMIX_DEV_SERVER_WS_PORT env var
+
+use `remix dev`'s '`--port`/`port` option instead
diff --git a/packages/remix-dev/compiler/js/compiler.ts b/packages/remix-dev/compiler/js/compiler.ts
index 96ce26d6b3f..569a60ecb12 100644
--- a/packages/remix-dev/compiler/js/compiler.ts
+++ b/packages/remix-dev/compiler/js/compiler.ts
@@ -138,10 +138,6 @@ const createEsbuildConfig = (
       "process.env.REMIX_DEV_ORIGIN": JSON.stringify(
         ctx.options.REMIX_DEV_ORIGIN ?? ""
       ),
-      // TODO: remove in v2
-      "process.env.REMIX_DEV_SERVER_WS_PORT": JSON.stringify(
-        ctx.config.devServerPort
-      ),
       ...(ctx.options.mode === "production"
         ? {
             "import.meta.hot": "undefined",
diff --git a/packages/remix-dev/compiler/server/compiler.ts b/packages/remix-dev/compiler/server/compiler.ts
index 0d88328231a..651a7064512 100644
--- a/packages/remix-dev/compiler/server/compiler.ts
+++ b/packages/remix-dev/compiler/server/compiler.ts
@@ -108,10 +108,6 @@ const createEsbuildConfig = (
     publicPath: ctx.config.publicPath,
     define: {
       "process.env.NODE_ENV": JSON.stringify(ctx.options.mode),
-      // TODO: remove in v2
-      "process.env.REMIX_DEV_SERVER_WS_PORT": JSON.stringify(
-        ctx.config.devServerPort
-      ),
       "process.env.REMIX_DEV_ORIGIN": JSON.stringify(
         ctx.options.REMIX_DEV_ORIGIN ?? ""
       ),
diff --git a/packages/remix-react/components.tsx b/packages/remix-react/components.tsx
index f4c6945a0b4..8cf47635673 100644
--- a/packages/remix-react/components.tsx
+++ b/packages/remix-react/components.tsx
@@ -1308,10 +1308,6 @@ export const LiveReload =
                   url.port =
                     ${port} ||
                     REMIX_DEV_ORIGIN ? new URL(REMIX_DEV_ORIGIN).port :
-                    Number(${
-                      // TODO: remove in v2
-                      process.env.REMIX_DEV_SERVER_WS_PORT
-                    }) ||
                     8002;
 
                   let ws = new WebSocket(url.href);