These proceedings comprise invited and contributed papers presented at the 14th International Conference on X-Ray Lasers (ICXRL 2014). This conference is part of a continuing series dedicated to recent developments and applications of x-ray lasers and other coherent x-ray sources with attention to supporting technologies and instrumentation. • Laser-pumped X-ray lasers • Discharge excitation and other X-ray laser pumping methods • Injection/seeding of X-ray amplifiers • New lasing transitions and novel X-ray laser schemes • High Harmonic sources-Free-electron laser generation in the XUV and X-ray range • Novel schemes for coherent XUV and X-ray generation • XUV and X-ray optics and metrology-Driving laser technology • Theory and modeling of X-ray gain medium and beam characteristics • Applicationsof high brightness and ultrashort X-ray sources