See my latest contest roundup for Writer Unboxed:
This submissions season covers fiction contests with deadlines between March 1, 2018 and May 31, 2018. March is absolutely stacked with deadlines; so no excuses about not submitting! Thanks to Literistic, Poets & Writers, Submittable Discover, and New Pages for many of these contests.
I found 26 opportunities ranging from flash fiction all the way to novellas with some excellent regional (i.e. lower competition) writing contests. See my list of Spring 2018 writing contests.