Capitalize the word province only when it refers to the government of the province.

Is the name of a province capitalized?

You capitalize "Province" when it's part of the name, as in Trang Province. Don't capitalize it when it names the type of entity, as in the province of Trang.

Should federal and provincial be capitalized?

When it comes to words such as federal, state, provincial, government, or national, only capitalize the word when it is part of a proper noun. A proper noun is the official name of a person, place, or thing.