Population Estimates

Intercensal Estimates

Intercensal estimates are produced once a decade by adjusting the existing time series of postcensal estimates for a decade to smooth the transition from one decennial census count to the next. They differ from the postcensal estimates that are released annually because they rely on a formula that redistributes the difference between the April 1 postcensal estimate and April 1 census count for the end of the decade across the estimates for that decade. Meanwhile, the postcensal estimates incorporate current data on births, deaths, and migration to produce each new vintage of estimates, and to revise estimates for years back to the last census.

Intercensal Estimates (2000-2010)

The 2000-2010 Intercensal Estimates may be revised and re-released at a later point in the decade.

• Methodology [PDF - 575k]
• National – monthly total estimates of the United States resident population, and annual estimates of the United States resident population by age, sex, race, and Hispanic origin
• State – annual estimates of the state resident populations by age, sex, race, and Hispanic origin
• County – annual estimates of county resident populations by age, sex, race and Hispanic origin
• Puerto Rico – annual estimates of the Commonwealth and Municipios resident populations by age and sex

Intercensal Estimates (1990-2000)

• Methodology [PDF - 33k]
• National – monthly total estimates of the United States resident, resident plus armed forces overseas, and civilian populations by age and sex
• State and County Totals – annual total estimates of the resident population for states and counties
• State and County Characteristics – annual estimates of the resident population for states and counties by age, sex, race, and Hispanic origin