MOSAIC is a geodemographic segmentation system developed by Experian and marketed in over twenty countries worldwide.

Each of nearly one-quarter million block groups are classified into sixty-two segments on the basis of a wide range of demographic characteristics. The basic premise of geodemographic segmentation is that people tend to gravitate towards communities with other people of similar backgrounds, interests, and means. MOSAIC is linked to the systems in other nations through the Global MOSAIC classification, which consists of fourteen market segments found in every modernized country.

U.S. MOSAIC is one of over twenty neighborhood classification systems built by Experian staff, whose international segmentation experiences stretches back over twenty years. Along with the international experience applied in this product, some of the most experienced geodemographers in North America were involved with the development of MOSAIC. The MOSAIC assignments are updated annually by incorporating updated AGS demographics into the segmentation model, ensuring that the assignment is as accurate as possible given shifts in local area demographics.

Neighborhood classification or segmentation is one of the cornerstones of geodemographic analysis and is used in a wide range of marketing and site location applications, including: neighborhood description, customer analysis, facility planning, advertising, and direct mail. The attractiveness of neighborhood segmentation stems from the analytical performance and inherent simplicity and understandability of the technique.