Optical waveguides are fundamental elements in integrated optics. Compact lasers based on the waveguide platforms are miniature light sources that have gained increasing research attention. Waveguide lasers are expected to play important roles in photonics. Laser crystals are major gain media for solid-state lasers. In this study, we review the state-of-the-art advances in solid-state waveguide lasers, including operation of continuous wave and pulse (Q-switched or mode-locked). The lasing wavelength covers a wide spectral range from visible light to the mid-infrared. Furthermore, a brief perspective on future research directions is provided.