In Portrait of Richard Barrington, Later Fourth Viscount Barrington, the subject is depicted in a formal pose, wearing an elegant dark coat with a white cravat. The background features a muted landscape, which adds depth to the composition. The colors are rich, with deep blues and browns dominating the palette, creating a sense of gravitas.

Stuart's attention to detail in the facial features captures the character of Barrington effectively. The painting is executed in oil on canvas, a common medium for portraiture during the 18th century. Stuart's technique is characterized by smooth brushwork and a careful rendering of textures, particularly in the clothing and skin tones. The dimensions of the work are approximately 76 x 102 cm, making it a substantial piece for display.

The use of light and shadow enhances the three-dimensional quality of the figure. Gilbert Stuart was a prominent American portrait painter known for his ability to capture the likeness and personality of his subjects. This portrait of Richard Barrington is significant as it reflects the style of Colonial American portraiture, which often emphasized the social status of the sitter. An interesting fact about this work is that Stuart painted many notable figures of his time, including George Washington, making him a key figure in American art history.