Census categorization changes refer to the modifications made over time in how individuals identify themselves and are classified by official census data. These changes reflect evolving social understandings of race, ethnicity, and identity, particularly as they pertain to multiracial and multiethnic identities. As society becomes more aware of and sensitive to the complexities of identity, census forms have been adjusted to accommodate a broader range of self-identification options, recognizing the diverse experiences of individuals from mixed backgrounds.