Block group意思

"Block group" is a term used in the context of census data and refers to a specific geographic area defined by the United States Census Bureau for the collection and presentation of census information. These areas are smaller than census tracts and larger than blocks. A block group is the smallest geographic unit for which the Census Bureau releases detailed data, such as population counts, demographic characteristics, and socioeconomic data.

Each block group is assigned a unique five-digit number, which is used to identify it in Census Bureau data products. Block groups are designed to have a relatively consistent population size, which makes the data collected within them more comparable across different areas.

The concept of block groups is particularly useful for understanding the demographic makeup and socioeconomic conditions of specific neighborhoods within a city or town. Researchers, urban planners, and local governments often use block group data to inform decisions about resource allocation, infrastructure development, and policy making.