npm install react-native-calendario --save. import CheckBoxOutlineBlankIcon from "@material-ui/icons/CheckBoxOutlineBlank" Default; defaultValue: String: The value of the selected option: disabled: Boolean: If specified, the component will be disabled: false: name: String: Value representing the `name` attribute of the inner DOM element: label: String: String value to use when you want to add a label: placeholder: String: String value to use as placeholder text . Approach 1: Without using React Select component You can use a boolean-selected attribute with an option whose value needs to be set default. well done mate. Please assume all such links are affiliate links which may result in my earning commissions and fees. Alternatively, you can split your options state into 2 states: Note that since you are controlling the select component, there is no need to specify the default prop in