Speak Up Press accepts writers ages 13-19 years old as well as adult. We are always looking for new and engaging works of nonfiction for young adults. (Poetry submissions are closed.) We are looking for stories about finding voice, overcoming adversity, striking out in new directions, or being creative. Contemporary stories are preferred, but historical nonfiction is also accepted. If you are querying historical nonfiction, make sure you have a fresh and engaging angle for your story. Query one page first.
Details at http://speakuppress.org/submissions/