There's the daily কবিতা contest on lulu:
link While you're still a teen, আপনি can enter the Teen Ink monthly contest:
link Similarly, Creative Communication is dedicated to student writers, and it has a কবিতা contest three times a year:
link A fair resource for কবিতা contests is the free newsletter provided দ্বারা Winning Writers:
link Also Freelance লেখা has a pretty current তালিকা of লেখা contests, many of which are for poetry:
link Finally, an excellent resource for কবিতা competitions in your area is your local library: just go up to the reference ডেস্ক and talk to a librarian there (not a clerk at the check-out desk!) about কবিতা contests.