Artstudy.org offers various examples of artist statements. It also includes information on artist statements in general and how to go about writing one.
CGU offers a quick guide on writing an artist statement using statement examples to demonstrate different writing techniques and do's and dont's.
The Ringling College of Art and Design's Center for Career Services website provides information on artist statements and their development. You can also make an appointment with the Academic Resource Center (ARC) for more assistance in writing your resume, cover letter, and artist statement.