Having over 372 million total average circulation in media targeting rural areas, Echo Media is on the forefront of this target segment. Understanding the true meanings of A, B, C and D counties can help advertisers achieve their marketing goals. According to Nielsen Media Research, “A” counties belong to the 21 largest metropolitan areas based on household counts from census data. “B” counties are also metropolitan areas, not included in the “A” county list, with more than 85,000 households. “C” counties are ones not included in “A” or “B” and either have more than 20,000 households or are in metropolitan areas with more than 20,000 households. All counties that remain fall into the “D” county category.