Alphabetical: K through O
- K
- Casey Kaplan Gallery
- Paul Kasmin Gallery
- James Kelly Contemporary
- June Kelly Gallery
- Sean Kelly Gallery
- Anton Kern Gallery
- Jack Kilgore and Co
- Nicole Klagsbrun Gallery
- Michael Kohn Gallery
- Barbara Krakow Gallery
- Hans P. Kraus Jr., Inc.
- Kraushaar Galleries
- Greg Kucera Gallery
- L
- L&M Arts
- Margo Leavin Gallery
- Lehmann Maupin - 540 West 26th Street
- Lehmann Maupin - 201 Chrystie Street
- Galerie Lelong
- Lennon, Weinberg
- Locks Gallery
- Meredith Long and Company
- Jeffrey H. Loria & Co., Inc. – New York City
- Jeffrey H. Loria & Co., Inc. – Southampton
- L.A. Louver, Inc.
- Luhring Augustine
- M
- Makler Gallery
- Lawrence Markey
- Matthew Marks Gallery: Chelsea - 523 W 24 Street
- Matthew Marks Gallery: Chelsea - 522 W 22 Street
- Matthew Marks Gallery: Chelsea - 526 W 22 Street
- Mary-Anne Martin/Fine Art – New York City
- Mary-Anne Martin/Fine Art – Miami
- Barbara Mathes Gallery
- Stephen Mazoh & Co, Inc.
- Jason McCoy, Inc.
- McKee Gallery
- Anthony Meier Fine Arts
- Menconi & Schoelkopf Fine Art, LLC
- Metro Pictures
- Laurence Miller Gallery
- Robert Miller Gallery
- Yossi Milo Gallery
- Mitchell-Innes & Nash: Madison Avenue
- Mitchell-Innes & Nash: Chelsea
- Modernism Inc.
- Moeller Fine Art New York – Berlin
- Montgomery Gallery
- Donald Morris Gallery, Inc. – Birmingham
- Donald Morris Gallery, Inc. – New York City