diff --git a/crates/oxc_linter/src/rules/eslint/default_param_last.rs b/crates/oxc_linter/src/rules/eslint/default_param_last.rs
index cdc32fc9dbab3..0262276652088 100644
--- a/crates/oxc_linter/src/rules/eslint/default_param_last.rs
+++ b/crates/oxc_linter/src/rules/eslint/default_param_last.rs
@@ -54,11 +54,13 @@ impl Rule for DefaultParamLast {
 fn check_params<'a>(items: &'a [FormalParameter<'a>], ctx: &LintContext<'a>) {
     let mut has_seen_plain_param = false;
     for param in items.iter().rev() {
-        if !param.pattern.kind.is_assignment_pattern() {
+        if !param.pattern.kind.is_assignment_pattern() && !param.pattern.optional {
             has_seen_plain_param = true;
             continue;
         }
-        if has_seen_plain_param && param.pattern.kind.is_assignment_pattern() {
+        if has_seen_plain_param
+            && (param.pattern.kind.is_assignment_pattern() || param.pattern.optional)
+        {
             ctx.diagnostic(default_param_last_diagnostic(param.span));
         }
     }
@@ -82,6 +84,100 @@ fn test() {
         "const f = function f() {}",
         "const f = function f(a) {}",
         "const f = function f(a = 5) {}",
+        "function fn(a: string = 'a', b?: string) {}",
+        "function foo() {}",
+        "function foo(a: number) {}",
+        "function foo(a = 1) {}",
+        "function foo(a?: number) {}",
+        "function foo(a: number, b: number) {}",
+        "function foo(a: number, b: number, c?: number) {}",
+        "function foo(a: number, b = 1) {}",
+        "function foo(a: number, b = 1, c = 1) {}",
+        "function foo(a: number, b = 1, c?: number) {}",
+        "function foo(a: number, b?: number, c = 1) {}",
+        "function foo(a: number, b = 1, ...c) {}",
+        "const foo = function () {};",
+        "const foo = function (a: number) {};",
+        "const foo = function (a = 1) {};",
+        "const foo = function (a?: number) {};",
+        "const foo = function (a: number, b: number) {};",
+        "const foo = function (a: number, b: number, c?: number) {};",
+        "const foo = function (a: number, b = 1) {};",
+        "const foo = function (a: number, b = 1, c = 1) {};",
+        "const foo = function (a: number, b = 1, c?: number) {};",
+        "const foo = function (a: number, b?: number, c = 1) {};",
+        "const foo = function (a: number, b = 1, ...c) {};",
+        "const foo = () => {};",
+        "const foo = (a: number) => {};",
+        "const foo = (a = 1) => {};",
+        "const foo = (a?: number) => {};",
+        "const foo = (a: number, b: number) => {};",
+        "const foo = (a: number, b: number, c?: number) => {};",
+        "const foo = (a: number, b = 1) => {};",
+        "const foo = (a: number, b = 1, c = 1) => {};",
+        "const foo = (a: number, b = 1, c?: number) => {};",
+        "const foo = (a: number, b?: number, c = 1) => {};",
+        "const foo = (a: number, b = 1, ...c) => {};",
+        "
+        class Foo {
+            constructor(a: number, b: number, c: number) {}
+        }",
+        "
+        class Foo {
+            constructor(a: number, b?: number, c = 1) {}
+        }",
+        "
+        class Foo {
+            constructor(a: number, b = 1, c?: number) {}
+        }",
+        "
+        class Foo {
+            constructor(
+                public a: number,
+                protected b: number,
+                private c: number,
+            ) {}
+        }",
+        "
+        class Foo {
+            constructor(
+                public a: number,
+                protected b?: number,
+                private c = 10,
+            ) {}
+        }",
+        "
+        class Foo {
+            constructor(
+                public a: number,
+                protected b = 10,
+                private c?: number,
+            ) {} 
+        }",
+        "
+        class Foo {
+            constructor(
+                a: number,
+                protected b?: number,
+                private c = 0,
+            ) {}
+        }",
+        "
+        class Foo {
+            constructor(
+                a: number,
+                b?: number,
+                private c = 0,
+            ) {}
+        }",
+        "
+        class Foo {
+            constructor(
+                a: number,
+                private b?: number,
+                c = 0,
+            ) {}
+        }",
     ];
 
     let fail = vec![
@@ -96,6 +192,56 @@ fn test() {
         "const f = ({ a, b } = { a: 1, b: 2 }, c) => {}",
         "const f = ([a] = [], b) => {}",
         "const f = ([a, b] = [1, 2], c) => {}",
+        "function foo(a = 1, b: number) {}",
+        "function foo(a = 1, b = 2, c: number) {}",
+        "function foo(a = 1, b: number, c = 2, d: number) {}",
+        "function foo(a = 1, b: number, c = 2) {}",
+        "function foo(a = 1, b: number, ...c) {}",
+        "function foo(a?: number, b: number) {}",
+        "function foo(a: number, b?: number, c: number) {}",
+        "function foo(a = 1, b?: number, c: number) {}",
+        "function foo(a = 1, { b }) {}",
+        "function foo({ a } = {}, b) {}",
+        "function foo({ a, b } = { a: 1, b: 2 }, c) {}",
+        "const foo = function (a = 1, b: number) {};",
+        "const foo = function (a = 1, b = 2, c: number) {};",
+        "const foo = function (a = 1, b: number, c = 2, d: number) {};",
+        "const foo = function (a = 1, b: number, c = 2) {};",
+        "const foo = function (a = 1, b: number, ...c) {};",
+        "const foo = function (a?: number, b: number) {};",
+        "const foo = function (a: number, b?: number, c: number) {};",
+        "const foo = function (a = 1, b?: number, c: number) {};",
+        "const foo = function (a = 1, { b }) {};",
+        "const foo = function ({ a } = {}, b) {};",
+        "const foo = function ({ a, b } = { a: 1, b: 2 }, c) {};",
+        "const foo = (a = 1, b: number) => {};",
+        "const foo = (a = 1, b = 2, c: number) => {};",
+        "const foo = (a = 1, b: number, c = 2, d: number) => {};",
+        "const foo = (a = 1, b: number, c = 2) => {};",
+        "const foo = (a = 1, b: number, ...c) => {};",
+        "const foo = (a?: number, b: number) => {};",
+        "const foo = (a: number, b?: number, c: number) => {};",
+        "const foo = (a = 1, b?: number, c: number) => {};",
+        "
+        class Foo {
+            constructor(
+                public a?: number,
+                private b: number,
+            ) {} 
+        }",
+        "
+        class Foo {
+            constructor(a = 0, b: number) {}
+        }",
+        "class Foo {
+            constructor(a?: number, b: number) {}
+        }",
+        "class Foo {
+            constructor(
+                public a = 0,
+                private b: number,
+            ) {}
+        }",
     ];
 
     Tester::new(DefaultParamLast::NAME, DefaultParamLast::PLUGIN, pass, fail).test_and_snapshot();
diff --git a/crates/oxc_linter/src/snapshots/eslint_default_param_last.snap b/crates/oxc_linter/src/snapshots/eslint_default_param_last.snap
index c0cd80f8183dd..49f25282c6aa1 100644
--- a/crates/oxc_linter/src/snapshots/eslint_default_param_last.snap
+++ b/crates/oxc_linter/src/snapshots/eslint_default_param_last.snap
@@ -1,6 +1,6 @@
 ---
 source: crates/oxc_linter/src/tester.rs
-snapshot_kind: text
+assertion_line: 357
 ---
   ⚠ eslint(default-param-last): Default parameters should be last
    ╭─[default_param_last.tsx:1:12]
@@ -92,3 +92,312 @@ snapshot_kind: text
    ·            ───────────────
    ╰────
   help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ function foo(a = 1, b: number) {}
+   ·              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:21]
+ 1 │ function foo(a = 1, b = 2, c: number) {}
+   ·                     ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ function foo(a = 1, b = 2, c: number) {}
+   ·              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:32]
+ 1 │ function foo(a = 1, b: number, c = 2, d: number) {}
+   ·                                ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ function foo(a = 1, b: number, c = 2, d: number) {}
+   ·              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ function foo(a = 1, b: number, c = 2) {}
+   ·              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ function foo(a = 1, b: number, ...c) {}
+   ·              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ function foo(a?: number, b: number) {}
+   ·              ──────────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:25]
+ 1 │ function foo(a: number, b?: number, c: number) {}
+   ·                         ──────────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:21]
+ 1 │ function foo(a = 1, b?: number, c: number) {}
+   ·                     ──────────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ function foo(a = 1, b?: number, c: number) {}
+   ·              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ function foo(a = 1, { b }) {}
+   ·              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ function foo({ a } = {}, b) {}
+   ·              ──────────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ function foo({ a, b } = { a: 1, b: 2 }, c) {}
+   ·              ─────────────────────────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:23]
+ 1 │ const foo = function (a = 1, b: number) {};
+   ·                       ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:30]
+ 1 │ const foo = function (a = 1, b = 2, c: number) {};
+   ·                              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:23]
+ 1 │ const foo = function (a = 1, b = 2, c: number) {};
+   ·                       ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:41]
+ 1 │ const foo = function (a = 1, b: number, c = 2, d: number) {};
+   ·                                         ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:23]
+ 1 │ const foo = function (a = 1, b: number, c = 2, d: number) {};
+   ·                       ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:23]
+ 1 │ const foo = function (a = 1, b: number, c = 2) {};
+   ·                       ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:23]
+ 1 │ const foo = function (a = 1, b: number, ...c) {};
+   ·                       ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:23]
+ 1 │ const foo = function (a?: number, b: number) {};
+   ·                       ──────────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:34]
+ 1 │ const foo = function (a: number, b?: number, c: number) {};
+   ·                                  ──────────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:30]
+ 1 │ const foo = function (a = 1, b?: number, c: number) {};
+   ·                              ──────────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:23]
+ 1 │ const foo = function (a = 1, b?: number, c: number) {};
+   ·                       ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:23]
+ 1 │ const foo = function (a = 1, { b }) {};
+   ·                       ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:23]
+ 1 │ const foo = function ({ a } = {}, b) {};
+   ·                       ──────────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:23]
+ 1 │ const foo = function ({ a, b } = { a: 1, b: 2 }, c) {};
+   ·                       ─────────────────────────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ const foo = (a = 1, b: number) => {};
+   ·              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:21]
+ 1 │ const foo = (a = 1, b = 2, c: number) => {};
+   ·                     ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ const foo = (a = 1, b = 2, c: number) => {};
+   ·              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:32]
+ 1 │ const foo = (a = 1, b: number, c = 2, d: number) => {};
+   ·                                ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ const foo = (a = 1, b: number, c = 2, d: number) => {};
+   ·              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ const foo = (a = 1, b: number, c = 2) => {};
+   ·              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ const foo = (a = 1, b: number, ...c) => {};
+   ·              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ const foo = (a?: number, b: number) => {};
+   ·              ──────────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:25]
+ 1 │ const foo = (a: number, b?: number, c: number) => {};
+   ·                         ──────────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:21]
+ 1 │ const foo = (a = 1, b?: number, c: number) => {};
+   ·                     ──────────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:1:14]
+ 1 │ const foo = (a = 1, b?: number, c: number) => {};
+   ·              ─────
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:4:17]
+ 3 │             constructor(
+ 4 │                 public a?: number,
+   ·                 ─────────────────
+ 5 │                 private b: number,
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:3:25]
+ 2 │         class Foo {
+ 3 │             constructor(a = 0, b: number) {}
+   ·                         ─────
+ 4 │         }
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:2:25]
+ 1 │ class Foo {
+ 2 │             constructor(a?: number, b: number) {}
+   ·                         ──────────
+ 3 │         }
+   ╰────
+  help: Enforce default parameters to be last.
+
+  ⚠ eslint(default-param-last): Default parameters should be last
+   ╭─[default_param_last.tsx:3:17]
+ 2 │             constructor(
+ 3 │                 public a = 0,
+   ·                 ────────────
+ 4 │                 private b: number,
+   ╰────
+  help: Enforce default parameters to be last.