You can apply for statewide or nationwide protection of a trademark.
State Application in Iowa
An Application for Registration of Mark, through the Iowa Secretary of State's Office, Business Services Division, Lucas Building, 1st Floor, Des Moines, Iowa 50319, 515- 281-5204, includes instructions on how to fill out the application. The Fee is $10.00.
National Application through USPTO
Basic Facts About Trademarks explains how to fill out a trademark application through the United States Patent and Trademark Office (USPTO). The Fee is $375.00 for an application filed on paper, $325.00 for an application filed online, $275.00 for filing online and meeting requirements for a reduced filing fee. File online through the Trademark Electronic Application System.