Population Estimates

Vintage 2001 Archive

National

The Population Estimates Program produces monthly national population estimates by age, sex, race, and Hispanic origin for the United States. These estimates cover four different populations: resident population, resident population plus Armed Forces overseas, civilian population, and civilian noninstitutional population. All reference dates in the monthly national estimates refer to the first of the month.

Total Population	Annual Series Through 2001
	2000 to 2001 Change, Births, Deaths, and Migration
	Time Series of Change, Births, Deaths, and Migration
Population by Age, Sex, Race and Hispanic or Latino Origin	Age and Sex
	Sex, Race, and Hispanic Origin
	Age, Race and Hispanic Origin
	Race Response and Hispanic Origin
	Time Series of Estimated National Demographic Components of Change by Hispanic or Latino Origin: April 1, 2000 to July 1, 2001
Methodology	2001 Methodology: Resident Population Estimates of the United States

State

The Population Estimates Program produces for states each year: total population estimates, estimates by age, sex, race and Hispanic origin. The release of total population estimates at the end of the calendar year also includes demographic components of change. A second release in the summer presents estimates by age, sex, race, and Hispanic origin. All estimates are for the resident population unless noted otherwise. The reference date for state estimates is July 1.

Total Population	Time Series of State Population Estimates: April 1, 2000 to July 1, 2001
	Estimated State Demographic Components of Change: April 1, 2000 to July 1, 2001
	Time Series of Estimated State Demographic Components of Change: July 1, 2000 to July 1, 2001
	States Ranked by Estimated July 1, 2001 Population
	States Ranked by Estimated Percent Population Change from April 1, 2000 to July 1, 2001
	States Ranked by Estimated Numeric Population Change from April 1, 2000 to July 1, 2001
Maps	Percent Change in Population: April 1, 2000 to July 1, 2001 (41k)
Maps	State Population Distribution: July 1, 2001 (40k)
Population by Age, Sex, Race, and Hispanic or Latino Origin	The 1999 state population estimates by age, sex, race, and Hispanic or Latino origin were the most recent estimates available during the 2001 vintage estimates series. Please refer to the state section of the 1990’s archive page.
Intercensal Estimates: 1990 to 2000	Time Series of Intercensal Estimates by County
Methodology	Estimates of State and County Total Population

County

The Population Estimates Program produces for counties each year: total population estimates and estimates by age, sex, race and Hispanic origin. The release of total population estimates in the spring also includes demographic components of change. A second release in the summer presents estimates by age, sex, race, and Hispanic origin. All estimates are for the resident population unless noted otherwise. The reference date for county estimates is July 1.

Total Population	Components of Population Change by County: July 1, 2000 to July 1, 2001 (Annual)
	Components of Population Change by County: April 1, 2000 to July 1, 2001 (Cumulative)
	Components of Population Change by County: April 1, 2000 to July 1, 2000 (Quarter Year)
	Counties Ranked by Numeric Population Change: April 1, 2000 to July 1, 2001
	Counties Ranked by Percent Population Change: April 1, 2000 to July 1, 2001
	Counties Ranked by Population Size: July 1, 2001
	Time Series of Population Estimates by County: April 1, 2000 to July 1, 2001
	Population Change for Counties sorted in Alphabetical Order
	100 Largest Counties: July 1, 2001
	100 Largest Gaining Counties by Numeric Change: April 1, 2000 to July 1, 2001
	100 Fastest Growing Counties by Percent Change: April 1, 2000 to July 1, 2001
	See changes to county, incorporated place, and county subdivision geography since 1990. The following states have had legal county boundary changes since 1990: Alaska, Maryland, Montana, and Virginia. See population estimate changes for counties in 2001 as brought about through the challenge process
Graphs	Distribution of Counties by County Population Size: July 1, 2001
	Distribution of Counties by County Size Category: July 1, 2001
	Distribution of Population by County Population Size: July 1, 2001
	Distribution of Population by County Size Category: July 1, 2001
Maps	Population Density: July 1, 2001 (47k)
	Percent Change in Population April 1, 2000 to July 1, 2001 (46k)
	Distribution by size category: July 1, 2001 (46k)
Population by Age, Sex, Race, and Hispanic or Latino Origin	The 1999 county population estimates by age, sex, race, and Hispanic or Latino origin were the most recent estimates available during the 2001 vintage estimates series. Please refer to the county section of the 1990’s archive page.
Additional Detail File	2000 to 2001 Demographic Components of Change file of the U.S., States, and Counties File Layout (3k) \| Plain text (718k) \| CSV (322k)
Intercensal Estimates: 1990 to 2000	Time Series of Intercensal Estimates by County
Methodology	Estimates of State and County Total Population

Place and County Subdivision

The Population Estimates Program (PEP) annually releases total population estimates for places and, in selected states, county subdivisions (minor civil divisions). The reference date for the place and county-subdivision population estimates is July 1. Each new time-series reflects boundary and other geographic changes.

Total Population	The 1999 subcounty population estimates were the most recent estimates available during the 2001 vintage estimates series. Please refer to the subcounty section of the 1990’s archive page.
Total Population	See geographic changes to places, county subdivisions, and counties since 1990. See population estimate changes for places and county subdivisions in 2001 as brought about through the challenge process.

Puerto Rico Municipios

The Population Estimates Program releases estimates for the commonwealth and municipios of Puerto Rico each year. The reference date for these estimates is July 1. The Census Bureau treats the commonwealth as the statistical equivalent of a state, and the municipio as the statistical equivalent of a county. A municipio is the governmental unit that is the primary legal subdivision of Puerto Rico.

Total Population	Time Series of Puerto Rico Estimates by Municipio: April 1, 2000 to July 1, 2001
	Puerto Rico Population Change by Municipio: April 1, 2000 to July 1, 2001
	Puerto Rico Components of Change by Municipio: April 1, 2000 to July 1, 2001 (Cumulative)
	Puerto Rico Components of Change by Municipio: April 1, 2000 to June 30, 2000 (Quarter Year)
	Puerto Rico Components of Change by Municipio: July 1, 2000 to June 30, 2001 (Annual)
Additional Detail File	2000 to 2001 Demographic Components of Change file of Puerto Rico Excel (23k) \| CSV (6k)
Methodology	Puerto Rico Municipio Population Estimates Methodology

Housing Units

The Population Estimates Program (PEP) each year produces estimates of housing units by state and county. The reference date for these estimates is July 1.

Total Housing Units	Time Series of State Housing Unit Estimates: April 1, 2000 to July 1, 2001
Total Housing Units	Time Series of Housing Unit Estimates by County: April 1, 2000 to July 1, 2001
Additional Detail File	Time Series of Housing Unit Estimates for the U.S., Regions, Divisions, and States: April 1, 2000 to July 1, 2001 CSV (4k)
Additional Detail File	Time Series of Housing Unit Estimates for the U.S., States, and Counties: April 1, 2000 to July 1, 2001 CSV (135k)
Methodology	Housing Unit Estimates