The Constitution mandates that every 10 years each resident living in the United States is counted. The fact that this happens only once a decade makes it important to be counted.
It determines the number of seats each state has in the U.S. House of Representatives
It is used to make decisions on how billions of Federal funds flow into states and local communities.
It shapes development like health clinics, fire departments, schools and other services for families, senior citizens and children.
Census results affect planning and funding for education—including programs such as Head Start, Pell Grants, school lunches, rural education, adult education, and grants for preschool special education.
It can even affect decisions on roads and highways
Developers and faith-based organizations can use high level census data to determine where to invest