When they’re hits, everyone loves novellas, those little books that can be read in one or two sittings. With word counts somewhere between a novel and a short story, novellas, with their reputation for poor return on investment, can be misfits for many publishers. It’s not easy to love losing money.
The following publications have identified novellas as their domain, which is quite a generous objective.
Garden Gnome Publications (anthology series)
Also of interest
Barrelhouse will accept submissions of nonfiction with a word count of 18,000–35,000 until March 1, 2017.
John Fox offers a nice list of chapbook and book publishers, including some literary magazines, that publish novellas.
The Tor.com Novella Program is only occasionally open to submissions.