diff --git a/examples/add_command_line_argument.py b/examples/add_command_line_argument.py
index 315e32ad4d..f0010b01fc 100644
--- a/examples/add_command_line_argument.py
+++ b/examples/add_command_line_argument.py
@@ -10,6 +10,10 @@ def _(parser):
     parser.add_argument("--my-ui-invisible-argument", include_in_web_ui=False, default="I am invisible")
     # Set `is_secret` to True if you want the text input to be password masked in the web UI
     parser.add_argument("--my-ui-password-argument", is_secret=True, default="I am a secret")
+    # Use a boolean default value if you want the input to be a checkmark
+    parser.add_argument("--my-ui-boolean-argument", default=True)
+    # Set `is_required` to mark a form field as required
+    parser.add_argument("--my-ui-required-argument", is_required=True, default="I am required")
 
 
 @events.test_start.add_listener
diff --git a/examples/web_ui_auth/custom_form.py b/examples/web_ui_auth/custom_form.py
index 2b29accdfd..0345aa5fee 100644
--- a/examples/web_ui_auth/custom_form.py
+++ b/examples/web_ui_auth/custom_form.py
@@ -53,6 +53,8 @@ def locust_init(environment, **_kwargs):
                     {
                         "label": "Username",
                         "name": "username",
+                        # make field required
+                        "is_required": True,
                     },
                     # boolean checkmark field
                     {"label": "Admin", "name": "is_admin", "default_value": False},
diff --git a/locust/argument_parser.py b/locust/argument_parser.py
index 70705cc130..39aaf89526 100644
--- a/locust/argument_parser.py
+++ b/locust/argument_parser.py
@@ -59,15 +59,18 @@ def add_argument(self, *args, **kwargs) -> configargparse.Action:
         Arguments:
             include_in_web_ui: If True (default), the argument will show in the UI.
             is_secret: If True (default is False) and include_in_web_ui is True, the argument will show in the UI with a password masked text input.
+            is_required: If True (default is False) and include_in_web_ui is True, the argument will show in the UI as a required form field.
 
         Returns:
             argparse.Action: the new argparse action
         """
         include_in_web_ui = kwargs.pop("include_in_web_ui", True)
         is_secret = kwargs.pop("is_secret", False)
+        is_required = kwargs.pop("is_required", False)
         action = super().add_argument(*args, **kwargs)
         action.include_in_web_ui = include_in_web_ui
         action.is_secret = is_secret
+        action.is_required = is_required
         return action
 
     @property
@@ -82,6 +85,14 @@ def secret_args_included_in_web_ui(self) -> dict[str, configargparse.Action]:
             if a.dest in self.args_included_in_web_ui and hasattr(a, "is_secret") and a.is_secret
         }
 
+    @property
+    def required_args_included_in_web_ui(self) -> dict[str, configargparse.Action]:
+        return {
+            a.dest: a
+            for a in self._actions
+            if a.dest in self.args_included_in_web_ui and hasattr(a, "is_required") and a.is_required
+        }
+
 
 class LocustTomlConfigParser(configargparse.TomlConfigParser):
     def parse(self, stream):
@@ -798,6 +809,7 @@ def default_args_dict() -> dict:
 class UIExtraArgOptions(NamedTuple):
     default_value: str
     is_secret: bool
+    is_required: bool
     help_text: str
     choices: list[str] | None = None
 
@@ -813,6 +825,7 @@ def ui_extra_args_dict(args=None) -> dict[str, dict[str, Any]]:
         k: UIExtraArgOptions(
             default_value=v,
             is_secret=k in parser.secret_args_included_in_web_ui,
+            is_required=k in parser.required_args_included_in_web_ui,
             help_text=parser.args_included_in_web_ui[k].help,
             choices=parser.args_included_in_web_ui[k].choices,
         )._asdict()
diff --git a/locust/test/test_parser.py b/locust/test/test_parser.py
index a76cc9d7fb..e50d581c39 100644
--- a/locust/test/test_parser.py
+++ b/locust/test/test_parser.py
@@ -373,6 +373,7 @@ def _(parser, **kw):
             parser.add_argument("--a1", help="a1 help")
             parser.add_argument("--a2", help="a2 help", include_in_web_ui=False)
             parser.add_argument("--a3", help="a3 help", is_secret=True)
+            parser.add_argument("--a4", help="a3 help", is_required=True)
 
         args = ["-u", "666", "--a1", "v1", "--a2", "v2", "--a3", "v3"]
         options = parse_options(args=args)
@@ -384,6 +385,7 @@ def _(parser, **kw):
         self.assertIn("a1", extra_args)
         self.assertNotIn("a2", extra_args)
         self.assertIn("a3", extra_args)
+        self.assertIn("a4", extra_args)
         self.assertEqual("v1", extra_args["a1"]["default_value"])
 
 
diff --git a/locust/web.py b/locust/web.py
index 2705cf8a1e..8c18a4c0f5 100644
--- a/locust/web.py
+++ b/locust/web.py
@@ -60,6 +60,7 @@ class InputField(TypedDict, total=False):
     default_value: bool | None
     choices: list[str] | None
     is_secret: bool | None
+    is_required: bool | None
 
 
 class CustomForm(TypedDict, total=False):
diff --git a/locust/webui/src/components/Form/CustomInput.tsx b/locust/webui/src/components/Form/CustomInput.tsx
index 40810e5a4d..66c32968a6 100644
--- a/locust/webui/src/components/Form/CustomInput.tsx
+++ b/locust/webui/src/components/Form/CustomInput.tsx
@@ -11,6 +11,7 @@ export default function CustomInput({
   defaultValue,
   choices,
   isSecret,
+  isRequired,
 }: ICustomInput) {
   if (choices) {
     return (
@@ -19,6 +20,7 @@ export default function CustomInput({
         label={label}
         name={name}
         options={choices}
+        required={isRequired}
         sx={{ width: '100%' }}
       />
     );
@@ -27,7 +29,7 @@ export default function CustomInput({
   if (typeof defaultValue === 'boolean') {
     return (
       <FormControlLabel
-        control={<Checkbox defaultChecked={defaultValue} />}
+        control={<Checkbox defaultChecked={defaultValue} required={isRequired} />}
         label={<Markdown content={label} />}
         name={name}
       />
@@ -35,7 +37,14 @@ export default function CustomInput({
   }
 
   if (isSecret) {
-    return <PasswordField defaultValue={defaultValue} label={label} name={name} />;
+    return (
+      <PasswordField
+        defaultValue={defaultValue}
+        isRequired={isRequired}
+        label={label}
+        name={name}
+      />
+    );
   }
 
   return (
@@ -43,6 +52,7 @@ export default function CustomInput({
       defaultValue={defaultValue}
       label={label}
       name={name}
+      required={isRequired}
       sx={{ width: '100%' }}
       type='text'
     />
diff --git a/locust/webui/src/components/Form/PasswordField.tsx b/locust/webui/src/components/Form/PasswordField.tsx
index 93f5f3d382..715f2dd965 100644
--- a/locust/webui/src/components/Form/PasswordField.tsx
+++ b/locust/webui/src/components/Form/PasswordField.tsx
@@ -8,7 +8,8 @@ export default function PasswordField({
   name = 'password',
   label = 'Password',
   defaultValue,
-}: Partial<Pick<ICustomInput, 'name' | 'label' | 'defaultValue'>>) {
+  isRequired,
+}: Partial<Pick<ICustomInput, 'name' | 'label' | 'defaultValue' | 'isRequired'>>) {
   const [showPassword, setShowPassword] = useState(false);
 
   const handleClickShowPassword = () => setShowPassword(!showPassword);
@@ -28,6 +29,7 @@ export default function PasswordField({
         id={`${label}-${name}-field`}
         label={label}
         name={name}
+        required={isRequired}
         type={showPassword ? 'text' : 'password'}
       />
     </FormControl>
diff --git a/locust/webui/src/types/form.types.ts b/locust/webui/src/types/form.types.ts
index b533092113..60166e6ebf 100644
--- a/locust/webui/src/types/form.types.ts
+++ b/locust/webui/src/types/form.types.ts
@@ -4,4 +4,5 @@ export interface ICustomInput {
   choices?: string[] | null;
   defaultValue?: string | number | boolean | null;
   isSecret?: boolean;
+  isRequired?: boolean;
 }