District of Columbia: 201

Population and Housing Unit Counts

2010 Census of Population and Housing

Issued June 2012

CPH-2-10

0

U.S. Department of Commerce

Economics and Statistics Administration

U.S. CENSUS BUREAU

census.gov

U.S. Department of Commerce

Rebecca M. Blank,

Acting Secretary

Rebecca M. Blank,

Deputy Secretary

Economics and Statistics Administration

Vacant,

Under Secretary

for Economic Affairs

U.S. CENSUS BUREAU

Robert M. Groves,

Director

District of Columbia: 2010

Population and Housing Unit Counts

Issued June 2012

CPH-2-10
ECONOMICS

AND STATISTICS

ADMINISTRATION

Economics 

and Statistics 

Administration

Vacant, 

Under Secretary for 

Economic Affairs

U.S. CENSUS BUREAU

Robert M. Groves,

Director

Thomas L. Mesenbourg, 

Deputy Director and 

Chief Operating Officer

Nancy A. Potok, 

Associate Director 

for Demographic Programs

Enrique J. Lamas, 

Chief, Population Division

SUGGESTED CITATION

U.S. Census Bureau, 

2010 Census of 

Population and Housing, 

Population and 

Housing Unit Counts,

CPH-2-10, District of Columbia 

U.S. Government Printing Office, 

Washington, DC, 

2012
Contents iii

List of Statistical Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

How to Use This Census Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-1

Table Finding Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II-1

User Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III-1

Crosswalk of Urban Areas and Places: 2010 . . . . . . . . . . . . . . . . . . . . IV-1

Statistical Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Appendixes

A Geographic Terms and Concepts . . . . . . . . . . . . . . . . . . . . . . . . *

B Definitions of Subject Characteristics . . . . . . . . . . . . . . . . . . . . . *

C Data Collection and Processing Procedures . . . . . . . . . . . . . . . . . *

D Questionnaire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . *

E Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1

F Operational Overview and Accuracy of the Data . . . . . . . . . . . . . *

G Residence Rule and Residence Situations for the 2010 Census 

 of the United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . *

H Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . *

*Appendix may be found in the separate volume, CPH-2-A, Population and Housing 

Unit Counts, Selected Appendixes, in print and on the Internet at <www.census.gov

/prod/cen2010/cph-2-a.pdf>.

CONTENTS

List of Statistical Tables v

LIST Of 

STATISTICAL 

TAbLES

Table 

no. Title Page

1. Population: Earliest Census to 2010; and Housing Units: 

1950 to 2010 ..................................... 1

 District of Columbia, Urban and Rural

2. Population, Housing Units, and Land Area by Urban and 

Rural and Size of Urban Area: 2010 . . . . . . . . . . . . . . . . . . . 2

 District of Columbia, Urban and Rural, Size of Urban 

 Area [Population]

3. Population by Urban and Rural and Size of Place: 2010 ... 4

 District of Columbia, Size of Place [Population]

4. Population and Housing Units: 1970 to 2010 ............ 6

 District of Columbia, County/County Equivalent

5. Population, Housing Units, Land Area, and Density: 2010; 

and Percent Change: 1980 to 2010 .................... 7

 District of Columbia, County/County Equivalent

6. Rank of Counties by Percent Change in Population: 

2000 to 2010 ...................................... 8

 County/County Equivalent

7. Population by Urban and Rural: 2010 .................. 9

 District of Columbia, County/County Equivalent

8. Population and Housing Units: 1990 to 2010; and Area 

Measurements and Density: 2010 .................... 10

 District of Columbia, County/County Equivalent, Place

9. Population and Housing Units: 1990 to 2010; and Area 

Measurements and Density: 2010 .................... 12

 District of Columbia, Place

10. Rank by 2010 Population and Housing Units: 

2000 and 2010 .................................... 14

 Place [2,500 or More Population]

11. Rank of Places by Percent Change in Population: 

2000 to 2010 ...................................... 15

 Place [2,500 or More Population]

12. Population and Housing Units for Urban Areas: 2010 ..... 16

 District of Columbia, Urbanized Area, Urban Cluster

How to Use This Census Report I-1

U.S. Census Bureau, 2010 Census

How to Use This Census Report

CONTENTS

Page

Introduction .................................................................. I-1

How to Find Geographic Areas and Subject Matter Data ................................. I-2

How to Use the Statistical Tables ................................................... I-2

Graphics ..................................................................... I-5

User Notes ................................................................... I-5

Appendixes .................................................................. I-5

INTRODUCTION

Data from the 2010 Census for the United States and Puerto Rico are presented in two printed report series 

and a single report for American Indians and Alaska Natives by tribe:

1. CPH-1, Summary Population and Housing Characteristics

2. CPH-2, Population and Housing Unit Counts

3. CPH-3, Characteristics of American Indians and Alaska Natives by Tribe 

The data from the 2010 Census were derived from a limited number of basic questions asked of the entire 

population and about every housing unit. Appendix D (see Selected Appendixes report at <www.census 

.gov/prod/cen2010/cph-2-a.pdf>) presents a facsimile of the questionnaire pages used to collect the data 

included in this report. Note that the “long form” data included in previous censuses are not included in 

the 2010 Census. 

The CPH-1, Summary Population and Housing Characteristics, report series provides data based on age, 

Hispanic or Latino origin, household relationship, race, sex, tenure (owner- or renter-occupied), and 

vacancy characteristics. Land area measurements and population density also are provided. This series is 

similar to the Census 2000 PHC-1 series. 

The CPH-2, Population and Housing Unit Counts, report series provides 2010 Census and historical comparisons of the population and housing unit counts. It also provides area measurements and density. The 

user notes section documents geographic changes over the past decade. This series is similar to the 

Census 2000 PHC-3 series. 

In each series, there is one report for each state, the District of Columbia, and Puerto Rico, plus a United 

States summary report. Many tables in the United States summary reports include data for Puerto Rico. 

The CPH-3, Characteristics of American Indians and Alaska Natives by Tribe, report provides population 

and housing information for selected American Indian and Alaska Native tribes. This report is similar to the 

Census 2000 PHC-5 report. This is a single report covering the entire United States. 
I-2 How to Use This Census Report

U.S. Census Bureau, 2010 Census

HOW TO FIND GEOGRAPHIC AREAS AND SUBJECT MATTER DATA

This report includes a table finding guide to assist the user in locating those statistical tables that contain 

the desired data. The table finding guide lists alphabetically, by geographic area, the subjects shown in 

this report. To determine which tables in this report show data for a particular topic, find the subject in the 

left-hand column of the table finding guide and then look across the columns using the headings at the top 

for the desired type of geographic area. Figure I-1 is an example of a table finding guide. 

The table finding guide does not include cross-classification of subject-matter items. Additional information to locate data within specific reports is provided in the headnote at the top of the table finding guide 

and in the footnotes at the bottom of the guide. 

Figure I-1.

Table Finding Guide

SUBJECTS BY TYPE OF GEOGRAPHIC AREA AND TABLE NUMBER

The types of geographic areas covered in this report are shown on the side, and subjects are shown at the top. See CPH-2-A, Population and 

Housing Unit Counts, Selected Appendixes (<www.census.gov/prod/cen2010/cph-2-a.pdf>), for a description of area classifications (Appendix A) 

and for definitions and explanations of subject characteristics (Appendix B).

Area Average per square Population Housing units measurement mile of land (density)

Geographic area Change Change 

from from 

Previous previous Previous previous Housing Number of 

 2010 Census censuses census 2010 Census censuses census Total area Land area Population units places

THE STATE1 

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2,3,4,5,7,8,9,12 1,4,8,9 1,5,9 1,2,4,5,8,9,12 1,4,8,9 1,5,9 8,9 2,5,8,9 5,8,9 5,8,9 1,3 Urban and rural . . . . . . . . . . . . . . . . . . . . 1,2,3,7,12 1 1 1,2,12 1 1 – 2 – – 3 Current urban definition . . . . . . . . . . . . . . 1,2,7,12 1 1 1,2,12 1 1 – 2 – – – 1950–90 urban definition . . . . . . . . . . . . . 1 1 1 1 1 1 – – – – – Urban and rural by size of place . . . . . . . 3 – – – – – – – – – 3 In urbanized area and in urban cluster . . 2,7,12 – – 2,12 – – – 2 – – – Size of urban area . . . . . . . . . . . . . . . . . . 2 – – 2 – – – 2 – – – In place and not in place . . . . . . . . . . . . . 3,7 – – – – – – – – – 3

COUNTY2

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,5,6,8 4,6,8 5,6 4,8 4,8 5 8 5,8 5,8 5,8 – Urban and rural . . . . . . . . . . . . . . . . . . . . 7 – – – – – – – – – – By percent change rank . . . . . . . . . . . . . . 6 6 6 – – – – – – – –

COUNTY SUBDIVISION3

By county . . . . . . . . . . . . . . . . . . . . . . . . . 8 8 – 8 8 – 8 8 8 8 – Alphabetically . . . . . . . . . . . . . . . . . . . . . 9 9 9 9 9 9 9 9 9 9 – By 2010 rank . . . . . . . . . . . . . . . . . . . . . . 10a 10a – 10a 10a – – – – – – By percent change rank . . . . . . . . . . . . . . 11a 11a 11a – – – – – – – –

PLACE

By county and county subdivision . . . . . . 8 8 – 8 8 – 8 8 8 8 – Alphabetically . . . . . . . . . . . . . . . . . . . . . 9 9 9 9 9 9 9 9 9 9 – By 2010 rank . . . . . . . . . . . . . . . . . . . . . . 10 10 – 10 10 – – – – – – By percent change rank . . . . . . . . . . . . . . 11 11 11 – – – – – – – –

URBAN AREA

Urbanized area and urban cluster . . . . . . 12 – 12 – – – – – – – –

1

 State, District of Columbia, or Puerto Rico .

2

 Parish in Louisiana; city and borough, municipality, borough, or census area in Alaska; and municipio in Puerto Rico; in Maryland, Missouri, Nevada, and Virginia, one or more cities 

are independent of counties and are treated as statistical equivalents of counties; the entire District of Columbia, which has no counties, is treated as a county equivalent . 3

 County subdivisions within the state are shown alphabetically with places for the following 12 states: Connecticut, Maine, Massachusetts, Michigan, Minnesota, New Hampshire, 

New Jersey, New York, Pennsylvania, Rhode Island, Vermont, and Wisconsin .

HOW TO USE THE STATISTICAL TABLES

Parts of a Statistical Table

The census data included in printed reports are arranged in tables. Each table includes four major parts: (1) 

heading, (2) boxhead, (3) stub, and (4) data field. A typical census report table is illustrated in Figure I-2.

The heading consists of the table number, title, and headnote. The table number indicates the position of 

the table within the report, while the title is a brief statement indicating the subjects and time reference 

of the data presented in the table. The headnote is enclosed in brackets and is located under the title. It 

contains statements that qualify, explain, or provide information pertaining to the entire table. 

Table Finding Guide II-1U.S. Census Bureau, 2010 Census
How to Use This Census Report I-3

U.S. Census Bureau, 2010 Census

The boxhead is under the heading. This portion of the table, which contains the individual column heads 

or captions, describes the data in each vertical column. In the boxhead of many tables, a spanner appears 

across and above two or more column heads or across two or more lower spanners. The purpose of a 

spanner is to classify or qualify items below it or separate the table into identifiable blocks in terms of 

major aspects of the data. 

The stub is located at the left edge of the table. It includes a listing of line or row captions or descriptions. 

At the top of the stub is the stubhead. The stubhead is considered to be an extension of the table title and 

usually shows generic geographic area designations and restrictions. 

Figure I-2.

PARTS OF A STATISTICAL TABLE

Table number and title Headnote Column head

Table 6. Spanner Heading Population for Selected Categories of Race: 2010

[For information on condentiality protection, nonsampling error, and denitions, see Selected Appendixes at <www.census.gov/prod/cen2010/cph-1-a.pdf>]

Race in combination with one or more other races Race alone or in combination with one or more other races

State Stubhead County

Place American Native American Native Boxhead Indian Hawaiian Indian Hawaiian

Black or and and Other Black or and and Other

African Alaska Pacic Some African Alaska Pacic Some

White American Native Asian Islander Other Race White American Native Asian Islander Other Race

 Delaware......................................................... 18,775 14,109 5,718 5,152 816 5,026 637,392 205,923 9,899 33,701 1,216 35,545

COUNTY

 Kent County......................................................... 4,523 3,595 1,558 1,215 215 838 114,522 42,508 2,601 4,521 306 4,073

 New Castle County............................................ 10,502 7,949 2,895 3,333 409 3,171 363,457 135,735 4,469 26,633 568 22,286

 Sussex County..................................................... 3,750 2,565 1,265 604 192 1,017 159,413 27,680 2,829 2,547 342 9,186

Sidehead PLACE

 Arden village, New Castle County................. 3 1 12 0 1 428 6 3 3 0 3

 Ardencroft village, New Castle County.......... 1 0 01 0 0 199 21 0 12 0 0

 Ardentown village, New Castle County......... 8 2 05 0 2 256 4 0 11 0 2

 Bear CDP, New Castle County........................ 522 447 149 132 11 201 10,298 7,129 211 944 16 1,527

 Bellefonte town, New Castle County............. 13 5 25 2 7 1,096 80 4 19 3 9

 Bethany Beach town, Sussex County........... 5 3 11 0 0 1,054 5 1 5 0 0

 Bethel town, Sussex County........................... 2 2 00 0 0 164 8 0 1 0 0

 Blades town, Sussex County............................ 45 46 6 0 3 7 802 391 15 10 3 74

 Bowers town, Kent County............................. 3 1 11 0 1 318 7 4 5 0 5

 Bridgeville town, Sussex County................... 62 51 16 8 5 12 1,391 545 19 14 7 152

 Brookside CDP, New Castle County............. 445 325 118 80 35 125 10,218 3,070 172 529 37 912

 Camden town, Kent County............................ 124 104 49 52 0 13 2,413 920 60 180 1 63

 Cheswold town, Kent County........................ 50 32 32 12 10 13 793 497 68 46 10 47

 Claymont CDP, New Castle County.............. 149 112 34 32 5 25 5,435 2,344 62 347 14 240

 Clayton town........................................................ 73 73 21 16 1 13 2,105 791 27 33 1 63

 Kent County (part)............................................ 73 73 21 16 1 13 2,105 791 27 33 1 63

 New Castle County (part).............................. 0 0 00 0 0 0 0 0 0 0 0

 Dagsboro town, Sussex County.................... 17 16 4 3 0 2 706 69 12 3 0 36

 Delaware City city, New Castle County.......... 64 46 16 5 0 5 1,473 231 17 22 0 20

 Delmar town, Sussex County.......................... 75 67 21 7 1 4 1,281 344 27 18 1 19

 Dewey Beach town, Sussex County............. 4 3 00 1 0 318 12 1 1 3 10

 Dover city, Kent County................................... 1,053 1,097 375 328 52 195 18,446 16,312 571 1,310 75 960

 Dover Base Housing CDP, Kent County........ 216 122 47 85 23 37 2,699 580 55 163 32 200

 Edgemoor CDP, New Castle County............ 99 115 39 9 1 16 3,499 2,089 58 72 1 99

 Ellendale town, Sussex County..................... 8 13 6 3 2 0 242 125 6 5 4 15

 Elsmere town, New Castle County................ 165 123 44 33 0 116 4,435 925 92 139 0 786

 Farmington town, Kent County........................ 0 0 00 0 0 110 0 0 0 0 0 Data Stub Felton town, Kent County................................. 48 38 12 3 0 12 998 290 20 25 1 23

field Fenwick Island town, Sussex County............ 1 0 10 0 0 371 2 1 3 0 3

 Frankford town, Sussex County.................... 10 11 4 0 2 5 407 249 4 11 2 190

 Frederica town, Kent County......................... 32 33 14 2 0 7 558 183 14 9 1 57

 Georgetown town, Sussex County................ 200 85 51 8 2 133 3,191 1,018 328 78 11 2,038

 Glasgow CDP, New Castle County................ 312 276 71 121 6 67 9,505 3,862 119 937 10 309

 Greenville CDP, New Castle County............. 24 10 3 22 0 6 2,018 121 3 190 0 28

 Greenwood town, Sussex County................. 28 12 17 5 0 0 718 211 17 11 0 48

 Harrington city, Kent County......................... 120 102 55 15 10 15 2,568 931 76 43 14 94

 Hartly town, Kent County.................................. 0 0 00 0 0 72 0 1 0 1 0

 Henlopen Acres town, Sussex County.......... 0 0 00 0 0 118 3 0 1 0 0

 Highland Acres CDP, Kent County................ 96 71 24 44 7 14 2,725 579 45 189 10 45

 Hockessin CDP, New Castle County............ 188 38 38 132 8 31 11,712 434 59 1,429 17 102

 Houston town, Kent County.......................... 2 2 01 0 1 346 22 2 4 0 3

 Kent Acres CDP, Kent County......................... 51 38 17 17 1 8 1,302 505 29 65 1 55

 Kenton town, Kent County.............................. 8 6 20 0 0 242 12 2 0 0 13

 Laurel town, Sussex County............................ 135 155 33 38 15 37 1,889 1,668 75 72 33 188

 Leipsic town, Kent County............................... 6 6 00 0 0 170 9 4 0 0 6

 Lewes city, Sussex County................................ 34 26 17 4 1 1 2,502 237 27 14 3 10

 Little Creek town, Kent County........................ 5 1 40 0 0 214 6 7 1 0 1

 Long Neck CDP, Sussex County.................... 6 3 50 0 1 1,896 44 10 7 0 31

 Magnolia town, Kent County......................... 7 2 42 0 1 182 28 14 3 0 6

 Middletown town, New Castle County........... 457 405 107 132 19 131 12,145 5,772 143 841 27 597

 Milford city............................................................ 189 176 65 27 23 60 6,404 2,304 115 137 45 838

 Kent County (part)............................................ 93 91 24 8 8 41 1,906 1,526 53 46 13 374

 Sussex County (part)....................................... 96 85 41 19 15 19 4,498 778 62 91 32 464

 Millsboro town, Sussex County..................... 90 97 29 20 7 23 2,863 792 49 149 7 154

 Millville town, Sussex County........................ 9 1 17 0 0 515 14 1 11 0 12

 Milton town, Sussex County............................ 75 76 20 3 0 12 2,027 497 38 18 1 92

 Newark city, New Castle County................... 626 318 141 325 31 112 26,532 2,412 194 2,570 41 519

 New Castle city, New Castle County............. 101 95 39 19 2 31 3,660 1,530 57 80 2 105

 Newport town, New Castle County................ 29 26 6 5 2 9 744 220 9 21 2 100

 North Star CDP, New Castle County............. 83 20 8 61 0 27 7,066 270 11 687 0 48

 Ocean View town, Sussex County................ 17 8 65 1 3 1,835 24 7 29 1 8

 Odessa town, New Castle County.................. 12 10 4 5 0 2 334 35 4 9 0 2

20 Delaware Summary Population and Housing Characteristics

U.S. Census Bureau, 2010 Census

State name and

page number Report title
I-4 How to Use This Census Report

U.S. Census Bureau, 2010 Census

In the stub, several features are used to help the user better understand the contents of the table. Usually, 

a block of data lines is preceded by a sidehead. The sidehead, similar to a spanner, describes and classifies 

the stub entries following it. The use of indentation in a stub indicates the relationship of one data line to 

another. Indented data lines represent subcategories that, in most instances, sum to a total. Occasionally 

in tables, it is desirable to show one or more single-line subcategories that do not sum to the total. 

The data field is that part of the statistical table that contains the data. It extends from the bottom of the 

boxhead to the bottom of the table and from the right of the stub to the right edge of the page. 

Both geographic and subject-matter terms appear in tables. It is important to read the definitions of the 

terms used in the tables because census terms often are defined in special ways that reflect the manner in 

which the questions were asked and the data were tabulated. Definitions of geographic terms are provided 

in Appendix A of CPH-2-A, Population and Housing Unit Counts, Selected Appendixes (<www.census.gov 

/prod/cen2010/cph-2-a.pdf>). Census tables often include derived measures such as medians, means, percentages, and ratios. These and other subject-matter terms are defined in Appendix B of the same report. 

Symbols and Geographic Abbreviations

The following symbols are used in the tables and explanations of subjects covered in 2010 Census reports:

• A dash ‘‘–’’ represents zero or a derived measure that rounds to less than 0.1. 

• (X) means not applicable. In the 1990 and earlier decennial census reports, three dots ‘‘. . . ’’ meant not 

applicable. 

• (NA) means not available. 

• The superscript prefix ‘‘r’’ indicates that a Census 2000 count has been revised since the publication 

of the Census 2000 reports as a result of certified Count Question Resolution (CQR) changes (see also 

<www.census.gov/prod/cen2000/notes/errata.pdf>). This symbol appears only in the 2010 Census 

CPH-2, Population and Housing Unit Counts, report series. 

• A minus sign ‘‘–’’ preceding a figure denotes decrease. The minus sign appears only in the 2010 Census 

CPH-2, Population and Housing Unit Counts, report series. 

The following are examples of geographic abbreviations and terms that may be used in the tables in this 

report:

• A ‘‘(part)’’ next to the name of a geographic area in a hierarchical presentation indicates that the geographic entity is located only partially in the superior geographic entity. For example, a ‘‘(part)’’ next to a 

place name in a county subdivision-place hierarchy indicates that the place is located in more than one 

county subdivision. (Places also may be ‘‘split’’ by county, congressional district, urban/rural, metropolitan area, voting district, and other geographic boundaries, depending on the presentation.) Other geographic entities also can be ‘‘split’’ by a higher-level entity. The exception is a tabulation block, which is 

unique within all geographic entities in census products. 

• ANVSA is Alaska Native village statistical area. 

• ANRC is Alaska Native Regional Corporation. 

• CCD is census county division. 

• CDP is census designated place. 

• CSA is combined statistical area. 

• NECTA is New England city and town area. 

• Metro Area is metropolitan statistical area. 
How to Use This Census Report I-5

U.S. Census Bureau, 2010 Census

• Micro Area is micropolitan statistical area. 

• OTSA is Oklahoma tribal statistical area. 

• SDTSA is state designated tribal statistical area. 

• TDSA is tribal designated statistical area. 

• UT is unorganized territory. 

GRAPHICS

Charts, statistical maps, and other graphic summaries are included in some 2010 Census reports. 

USER NOTES

User notes include general explanatory information, historical notes, and geographic notes. They also provide information about unique characteristics of the report and sometimes changes or corrections made 

too late to be reflected in the text or tables themselves. However, sometimes this information becomes 

available too late to be reflected even in the user notes. Therefore, updates are available in the Notes and 

Errata document at <www.census.gov/prod/cen2010/notes/errata.pdf>. 

APPENDIXES

Appendixes A through D, and F through H, described below, are in the separate printed volume, CPH-2-A, 

Population and Housing Unit Counts, Selected Appendixes, or on the Internet at <www.census.gov/prod 

/cen2010/cph-2-a.pdf>. Appendix E is included in this report. 

Appendix A, Geographic Terms and Concepts. Provides definitions of the types of geographic areas 

and related information used in census products. 

Appendix B, Definitions of Subject Characteristics. Contains definitions for the subject-matter terms 

used in census products, including explanations of derived measures, limitations of the data, and comparability with previous censuses. The subjects are listed alphabetically. Population characteristics are 

defined first, followed by the definitions of the housing subjects. 

Appendix C, Data Collection and Processing Procedures. Explains the 2010 Census mission and 

scope and provides thumbnail descriptions of 2010 Census operations. 

Appendix D, Questionnaire. Presents a facsimile of the 2010 Census questionnaire used to collect the 

data in this report. 

Appendix E, Maps. Contains maps depicting the geographic areas shown in this report. 

Appendix F, Operational Overview and Accuracy of the Data. Provides information on 2010 Census 

operations, including group quarters enumeration, confidentiality of the data, imputation of housing unit 

status and population counts, sources of errors in the data, and data editing. 

Appendix G, Residence Rule and Residence Situations for the 2010 Census of the United States. 

Contains a description of the residence rule and residence situations used by Census Bureau staff to 

guide decisions on where people should be counted in the 2010 Census. This document is the basis for 

residence-related sections of questionnaires, collection instruments, field materials, and training materials. 

Appendix H, Acknowledgments. Lists many of the U.S. Census Bureau staff who participated in report 

preparation. 

Table Finding Guide II-1

U.S. Census Bureau, 2010 Census Table finding Guide SUBJECTS BY TYPE OF GEOGRAPHIC AREA AND TABLE NUMBER The types of geographic areas covered in this report are shown on the side, and subjects are shown at the top. See CPH-2-

Housing Unit Counts, Selected Appendixes (<www.census.gov/prod/cen2010/cph-2-a.pdf>), for a description of area classiand for definitions and explanations of subject characteristics (Appendix B).

Geographic area

Population Housing units Area measurement Av

mi

 2010 Census 

Previous 

censuses

Change 

from 

previous 

census 2010 Census

Previous 

censuses

Change 

from 

previous 

census Total area Land area Po

THE STATE1 

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2,3,4,5,7,8,9,12 1,4,8,9 1,5,9 1,2,4,5,8,9,12 1,4,8,9 1,5,9 8,9 2,5,8,9 

Urban and rural . . . . . . . . . . . . . . . . . . . . 1,2,3,7,12 1 1 1,2,12 1 1 – 2 Current urban definition . . . . . . . . . . . . . . 1,2,7,12 1 1 1,2,12 1 1 – 2 1950–90 urban definition . . . . . . . . . . . . . 1 1 1 1 1 1 – – Urban and rural by size of place . . . . . . . 3 – – – – – – – In urbanized area and in urban cluster . . 2,7,12 – – 2,12 – – – 2 Size of urban area . . . . . . . . . . . . . . . . . . 2 – – 2 – – – 2 In place and not in place . . . . . . . . . . . . .COUNTY2

3,7 – – – – – – – 

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,5,6,8 4,6,8 5,6 4,8 4,8 5 8 5,8 Urban and rural . . . . . . . . . . . . . . . . . . . . 7 – – – – – – – 

By percent change rank . . . . . . . . . . . . . .COUNTY SUBDIVISION3

6 6 6 – – – – – 

By county . . . . . . . . . . . . . . . . . . . . . . . . . 8 8 – 8 8 – 8 8 Alphabetically . . . . . . . . . . . . . . . . . . . . . 9 9 9 9 9 9 9 9 By 2010 rank . . . . . . . . . . . . . . . . . . . . . . 10a 10a – 10a 10a – – – By percent change rank . . . . . . . . . . . . . .PLACE

11a 11a 11a – – – – – 

By county and county subdivision . . . . . . 8 8 – 8 8 – 8 8 Alphabetically . . . . . . . . . . . . . . . . . . . . . 9 9 9 9 9 9 9 9 By 2010 rank . . . . . . . . . . . . . . . . . . . . . . 10 10 – 10 10 – – – By percent change rank . . . . . . . . . . . . . .URBAN AREA

11 11 11 – – – – – 

Urbanized area and urban cluster . . . . . . 12 – 12 – – – – – 

1 State, District of Columbia, or Puerto Rico .2 Parish in Louisiana; city and borough, municipality, borough, or census area in Alaska; and municipio in Puerto Rico; in Maryland, Missouri, Nevada

are independent of counties and are treated as statistical equivalents of counties; the entire District of Columbia, which has no counties, is treated as a c

3 County subdivisions within the state are shown alphabetically with places for the following 12 states: Connecticut, Maine, Massachusetts, Michigan, 

New Jersey, New York, Pennsylvania, Rhode Island, Vermont, and Wisconsin .

User Notes III-1

U.S. Census Bureau, 2010 Census

User Notes

Additional information concerning this 2010 Census product may become available after this report is 

published. This information, called Notes and Errata, is available in portable document format (PDF) on the 

U.S. Census Bureau’s Internet site at <www.census.gov/prod/cen2010/notes/errata.pdf>.

GENERAL NOTES

The user should be aware that there are limitations to many of these data. Please refer to the text provided 

with this report for further explanation of the limitations of the data. The population and other data shown 

for the 2010 Census in this report are as of April 1, 2010; the boundaries used for all geographic entities 

are as of January 1, 2010. All boundaries are intended for Census Bureau statistical data collection and 

presentation only; their depiction and designation for statistical purposes do not constitute a determination of jurisdictional authority or entitlement. Corrections to the 2010 Census data as a result of certified 

Count Question Resolution (CQR) changes are available from the Census Bureau’s Internet site at 

<www.census.gov/prod/cen2010/notes/errata.pdf>.

HISTORICAL NOTES

The area of the District of Columbia was part of the original territory of the United States. The District of 

Columbia was formed from territory ceded by Maryland and Virginia in 1788 and was established in accordance with Acts of Congress passed in 1790 and 1791. Its boundary, a square ten miles on a side with 

vertices at the cardinal points to resemble a diamond, was established on March 30, 1791, and included 

all of the territory within present-day Arlington County, Virginia, and part of Alexandria city, Virginia. The 

portion south of the Potomac River was retroceded to Virginia in 1846.

Census data for the District of Columbia are available beginning with the 1800 census. The population 

shown for the District of Columbia from 1800 to 1840 does not include the portion of Virginia legally 

included in the district at the time of those censuses. The population of the District of Columbia as legally 

existent in those censuses is: 43,712 in 1840; 39,834 in 1830; 33,039 in 1820; 24,023 in 1810; and 

14,093 in 1800. Congress abolished the original county (Washington County) and incorporated places 

(Georgetown and Washington cities) in the District of Columbia in 1871, but later reestablished the city of 

Washington. The Census Bureau continued to recognize the boundaries of the previously existing areas for 

the 1880 and 1890 censuses. Congress has treated the District of Columbia as coextensive with 

Washington city since 1895.

GEOGRAPHIC NOTES

The Census Bureau treats the District of Columbia as equivalent to a state for data presentation purposes. 

Because the District of Columbia is not subdivided into any county or county subdivision entities, the 

Census Bureau treats the entire District of Columbia as statistically equivalent to a county and Washington 

city as statistically equivalent to a county subdivision. It treats Washington city as a legally incorporated 

place geographically coextensive with the District of Columbia.

Crosswalk of Urban Areas and Places IV-1

U.S. Census Bureau, 2010 Census

Crosswalk of Urban Areas and Places: 2010 

Urban Area Place Within Urban Area

URBANIZED AREA

Washington, DC--VA--MD Urbanized Area (part) Washington city

Population and Housing Unit Counts District of Columbia 1

U.S. Census Bureau, 2010 Census

Table 1. 

Population: Earliest Census to 2010; and Housing Units: 1950 to 2010

[For information concerning historical counts and geographic change, see “User Notes .” For information on confidentiality, nonsampling error, and definitions, see Appendixes]

District of Columbia

Urban and Rural

District of Columbia total Urban Rural Percent of total

Number

Change from 

preceding census

Number of 

places of 

2,500 or 

more Number

Change from 

preceding census

Number

Change from 

preceding census

Number Percent Number Percent Number Percent Urban Rural

POPULATION

Current urban definition:

 2010 (Apr . 1) . . . . . . . . . . . . . 601,723 29,664 5 .2 1 601,723 29,664 5 .2 – – – 100 .0 –

 2000 (Apr . 1) . . . . . . . . . . . . . 572,059 –34,841 –5 .7 1 572,059 –34,841 –5 .7 – – – 100 .0 –

 1990 (Apr . 1) . . . . . . . . . . . . .

1950–90 urban definition:

606,900 (X) (X) 1 606,900 (X) (X) – (X) (X) 100 .0 –

 1990 (Apr . 1) . . . . . . . . . . . . . 606,900 –31,532 –4 .9 1 606,900 –31,433 –4 .9 – – – 100 .0 –

 1980 (Apr . 1) . . . . . . . . . . . . . 638,432 –118,236 –15 .6 1 638,333 –118,177 –15 .6 – – – 100 .0 –

 1970 (Apr . 1) . . . . . . . . . . . . . 756,668 –7,288 –1 .0 1 756,510 –7,446 –1 .0 – – – 100 .0 –

 1960 (Apr . 1) . . . . . . . . . . . . . 763,956 –38,222 –4 .8 1 763,956 –38,222 –4 .8 – – – 100 .0 –

 1950 (Apr . 1) . . . . . . . . . . . . .

Pre-1950 urban definition:

802,178 (X) (X) 1 802,178 (X) (X) – (X) (X) 100 .0 –

 1960 (Apr . 1) . . . . . . . . . . . . . 763,956 –38,222 –4 .8 1 763,956 –38,222 –4 .8 – – – 100 .0 –

 1950 (Apr . 1) . . . . . . . . . . . . . 802,178 139,087 21 .0 1 802,178 139,087 21 .0 – – – 100 .0 –

 1940 (Apr . 1) . . . . . . . . . . . . . 663,091 176,222 36 .2 1 663,091 176,222 36 .2 – – – 100 .0 –

 1930 (Apr . 1) . . . . . . . . . . . . . 486,869 49,298 11 .3 1 486,869 49,298 11 .3 – – – 100 .0 –

 1920 (Jan . 1) . . . . . . . . . . . . . 437,571 106,502 32 .2 1 437,571 106,502 32 .2 – – – 100 .0 –

 1910 (Apr . 15) . . . . . . . . . . . . 331,069 52,351 18 .8 1 331,069 52,351 18 .8 – – – 100 .0 –

 1900 (June 1) . . . . . . . . . . . . . 278,718 48,326 21 .0 1 278,718 48,326 21 .0 – – – 100 .0 –

 1890 (June 1) . . . . . . . . . . . . . 230,392 52,768 29 .7 1 230,392 70,521 44 .1 – –17,753 –100 .0 100 .0 –

 1880 (June 1) . . . . . . . . . . . . . 177,624 45,924 34 .9 2 159,871 39,288 32 .6 17,753 6,636 59 .7 90 .0 10 .0

 1870 (June 1) . . . . . . . . . . . . . 131,700 56,620 75 .4 2 120,583 50,728 72 .6 11,117 5,892 112 .8 91 .6 8 .4

 1860 (June 1) . . . . . . . . . . . . . 75,080 23,393 45 .3 2 69,855 21,488 44 .4 5,225 1,905 57 .4 93 .0 7 .0

 1850 (June 1) . . . . . . . . . . . . . 51,687 17,942 53 .2 2 48,367 17,691 57 .7 3,320 251 8 .2 93 .6 6 .4

 1840 (June 1) . . . . . . . . . . . . . 33,745 3,484 11 .5 2 30,676 3,409 12 .5 3,069 75 2 .5 90 .9 9 .1

 1830 (June 1) . . . . . . . . . . . . . 30,261 6,925 29 .7 2 27,267 6,660 32 .3 2,994 265 9 .7 90 .1 9 .9

 1820 (Aug . 7) . . . . . . . . . . . . . 23,336 7,865 50 .8 2 20,607 7,451 56 .6 2,729 414 17 .9 88 .3 11 .7

 1810 (Aug . 6) . . . . . . . . . . . . . 15,471 7,327 90 .0 2 13,156 6,953 112 .1 2,315 374 19 .3 85 .0 15 .0

 1800 (Aug . 4) . . . . . . . . . . . . .

HOUSING UNITS

Current urban definition:

8,144 (X) (X) 2 6,203 (X) (X) 1,941 (X) (X) 76 .2 23 .8

 2010 (Apr . 1) . . . . . . . . . . . . . 296,719 21,874 8 .0 (X) 296,719 21,874 8 .0 – – – 100 .0 –

 2000 (Apr . 1) . . . . . . . . . . . . . 274,845 –3,644 –1 .3 (X) 274,845 –3,644 –1 .3 – – – 100 .0 –

 1990 (Apr . 1) . . . . . . . . . . . . .

1950–90 urban definition:

278,489 (X) (X) (X) 278,489 (X) (X) – (X) (X) 100 .0 –

 1990 (Apr . 1) . . . . . . . . . . . . . 278,489 1,240 0 .4 (X) 278,489 1,505 0 .5 – – – 100 .0 –

 1980 (Apr . 1) . . . . . . . . . . . . . 277,249 –1,078 –0 .4 (X) 276,984 –1,460 –0 .5 – – – 100 .0 –

 1970 (Apr . 1) . . . . . . . . . . . . . 278,327 15,686 6 .0 (X) 278,444 15,803 6 .0 – – – 100 .0 –

 1960 (Apr . 1) . . . . . . . . . . . . . 262,641 32,903 14 .3 (X) 262,641 32,903 14 .3 – – – 100 .0 –

 1950 (Apr . 1) . . . . . . . . . . . . . 229,738 (X) (X) (X) 229,738 (X) (X) – (X) (X) 100 .0 –
2 District of Columbia Population and Housing Unit Counts

U.S. Census Bureau, 2010 Census

Table 2. 

Population, Housing Units, and Land Area by Urban and Rural and Size of Urban Area: 2010

[Areas classified by population size . For information on confidentiality, nonsampling error, and definitions, see Appendixes]

District of Columbia

Urban and Rural

Size of Urban Area [Population]

Population Housing units Land area Number of urban areas

Total

Percent 

distribution Total

Percent 

distribution

In square 

miles

Percent 

distribution Total

Entirely in 

state

Partly in 

state

 District of Columbia . . . . . . . 601,723 100 .0 296,719 100 .0 61 100 .0 1 – 1

 Urban . . . . . . . . . . . . . . . . . . . . . 601,723 100 .0 296,719 100 .0 61 100 .0 1 – 1

In urbanized area . . . . . . . . . . . . . . . . 601,723 100 .0 296,719 100 .0 61 100 .0 1 – 1

 1,000,000 or more . . . . . . . . . . . . . 601,723 100 .0 296,719 100 .0 61 100 .0 1 – 1

 500,000 to 999,999 . . . . . . . . . . . . – – – – – – – – –

 250,000 to 499,999 . . . . . . . . . . . . – – – – – – – – –

 100,000 to 249,999 . . . . . . . . . . . . – – – – – – – – –

 50,000 to 99,999 . . . . . . . . . . . . . . – – – – – – – – –

In urban cluster . . . . . . . . . . . . . . . . . – – – – – – – – –

 25,000 to 49,999 . . . . . . . . . . . . . . – – – – – – – – –

 10,000 to 24,999 . . . . . . . . . . . . . . – – – – – – – – –

 5,000 to 9,999 . . . . . . . . . . . . . . . . – – – – – – – – –

 2,500 to 4,999 . . . . . . . . . . . . . . . . – – – – – – – – –

 Cumulative summary:

Urban area of—

 1,000,000 or more . . . . . . . . . . . . . 601,723 100 .0 296,719 100 .0 61 100 .0 1 – 1

 500,000 or more . . . . . . . . . . . . . . . 601,723 100 .0 296,719 100 .0 61 100 .0 1 – 1

 250,000 or more . . . . . . . . . . . . . . . 601,723 100 .0 296,719 100 .0 61 100 .0 1 – 1

 100,000 or more . . . . . . . . . . . . . . . 601,723 100 .0 296,719 100 .0 61 100 .0 1 – 1

 50,000 or more . . . . . . . . . . . . . . . . 601,723 100 .0 296,719 100 .0 61 100 .0 1 – 1

 25,000 or more . . . . . . . . . . . . . . . . 601,723 100 .0 296,719 100 .0 61 100 .0 1 – 1

 10,000 or more . . . . . . . . . . . . . . . . 601,723 100 .0 296,719 100 .0 61 100 .0 1 – 1

 5,000 or more . . . . . . . . . . . . . . . . . 601,723 100 .0 296,719 100 .0 61 100 .0 1 – 1

 2,500 or more . . . . . . . . . . . . . . . . . 601,723 100 .0 296,719 100 .0 61 100 .0 1 – 1

 Rural . . . . . . . . . . . . . . . . . . . . . – – – – – – (X) (X) (X)
Population and Housing Unit Counts District of Columbia 3

U.S. Census Bureau, 2010 Census

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4 District of Columbia Population and Housing Unit Counts

U.S. Census Bureau, 2010 Census

Table 3. 

Population by Urban and Rural and Size of Place: 2010

[Places classified by population size . For information on confidentiality, nonsampling error, and definitions, see Appendixes]

District of Columbia

Size of Place [Population]

Total Urban

Population

Number of 

places

Percent 

of total 

population Total

In place

Not in 

place

All urban places 

(entirely or partly urban) Entirely urban places Partly urban places

Population

Number of 

places Population

Number of 

places Population

Number of 

places

 District of Columbia . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – –

 In place . . . . . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

In place of—

 1,000,000 or more . . . . . . . . . . . – – – – – – – – – – (X)

 500,000 to 999,999 . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

 250,000 to 499,999 . . . . . . . . . . – – – – – – – – – – (X)

 100,000 to 249,999 . . . . . . . . . . – – – – – – – – – – (X)

 50,000 to 99,999 . . . . . . . . . . . . – – – – – – – – – – (X)

 25,000 to 49,999 . . . . . . . . . . . . – – – – – – – – – – (X)

 10,000 to 24,999 . . . . . . . . . . . . – – – – – – – – – – (X)

 5,000 to 9,999 . . . . . . . . . . . . . . – – – – – – – – – – (X)

 2,500 to 4,999 . . . . . . . . . . . . . . – – – – – – – – – – (X)

 2,000 to 2,499 . . . . . . . . . . . . . . – – – – – – – – – – (X)

 1,500 to 1,999 . . . . . . . . . . . . . . – – – – – – – – – – (X)

 1,000 to 1,499 . . . . . . . . . . . . . . – – – – – – – – – – (X)

 500 to 999 . . . . . . . . . . . . . . . . . – – – – – – – – – – (X)

 200 to 499 . . . . . . . . . . . . . . . . . – – – – – – – – – – (X)

 Less than 200 . . . . . . . . . . . . . . – – – – – – – – – – (X)

 Cumulative summary:

In place of—

 1,000,000 or more . . . . . . . . . . . – – – – – – – – – – (X)

 500,000 or more . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

 250,000 or more . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

 100,000 or more . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

 50,000 or more . . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

 25,000 or more . . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

 10,000 or more . . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

 5,000 or more . . . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

 2,500 or more . . . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

 2,000 or more . . . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

 1,500 or more . . . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

 1,000 or more . . . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

 500 or more . . . . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)

 200 or more . . . . . . . . . . . . . . . . 601,723 1 100 .0 601,723 601,723 1 601,723 1 – – (X)
Population and Housing Unit Counts District of Columbia 5

U.S. Census Bureau, 2010 Census

Table 3. 

Population by Urban and Rural and Size of Place: 2010—Con.

[Places classified by population size . For information on confidentiality, nonsampling error, and definitions, see Appendixes]

Rural

District of Columbia

Size of Place [Population]

Total

In place

Not in 

place

All rural places 

(entirely or partly rural) Entirely rural places Partly rural places

Population

Number of 

places Population

Number of 

places Population

Number of 

places

– – – – – – – – District of Columbia

– – – – – – – (X) In place

In place of—

– – – – – – – (X) 1,000,000 or more

– – – – – – – (X) 500,000 to 999,999

– – – – – – – (X) 250,000 to 499,999

– – – – – – – (X) 100,000 to 249,999

– – – – – – – (X) 50,000 to 99,999

– – – – – – – (X) 25,000 to 49,999

– – – – – – – (X) 10,000 to 24,999

– – – – – – – (X) 5,000 to 9,999

– – – – – – – (X) 2,500 to 4,999

– – – – – – – (X) 2,000 to 2,499

– – – – – – – (X) 1,500 to 1,999

– – – – – – – (X) 1,000 to 1,499

– – – – – – – (X) 500 to 999

– – – – – – – (X) 200 to 499

– – – – – – – (X) Less than 200

 Cumulative summary:

In place of—

– – – – – – – (X) 1,000,000 or more

– – – – – – – (X) 500,000 or more

– – – – – – – (X) 250,000 or more

– – – – – – – (X) 100,000 or more

– – – – – – – (X) 50,000 or more

– – – – – – – (X) 25,000 or more

– – – – – – – (X) 10,000 or more

– – – – – – – (X) 5,000 or more

– – – – – – – (X) 2,500 or more

– – – – – – – (X) 2,000 or more

– – – – – – – (X) 1,500 or more

– – – – – – – (X) 1,000 or more

– – – – – – – (X) 500 or more

– – – – – – – (X) 200 or more
6 District of Columbia Population and Housing Unit Counts

U.S. Census Bureau, Census 2010

Table 4. 

Population and Housing Units: 1970 to 2010

[For information concerning historical counts and geographic change, see “User Notes .” For information on confidentiality, nonsampling error, and definitions, see Appendixes]

District of Columbia

County/County Equivalent

Population Housing units

2010 2000 1990 1980 1970 2010 2000 1990 1980 1970

 District of Columbia . . . 601,723 572,059 606,900 638,432 756,668 296,719 274,845 278,489 277,249 278,327

District of Columbia . . . . . . . . . . 601,723 572,059 606,900 638,432 756,668 296,719 274,845 278,489 277,249 278,327
Population and Housing Unit Counts District of Columbia 7

U.S. Census Bureau, 2010 Census

Table 5. 

Population, Housing Units, Land Area, and Density: 2010; and Percent Change: 1980 to 2010

[For information concerning historical counts and geographic change, see “User Notes .” For information on confidentiality, nonsampling error, and definitions, see Appendixes]

District of Columbia

County/County Equivalent

Population

Housing 

units

Land area 

in square 

miles

Average per square 

mile of land Percent change

Population 

density

Housing 

unit 

density

Population Housing units

2000 to 

2010

1990 to 

2000

1980 to 

1990

2000 to 

2010

1990 to 

2000

1980 to 

1990

 District of Columbia . . . . . . . . . . . 601,723 296,719 61 .05 9,856 .2 4,860 .3 5 .2 –5 .7 –4 .9 8 .0 –1 .3 0 .4

District of Columbia . . . . . . . . . . . . . . . . . . 601,723 296,719 61 .05 9,856 .2 4,860 .3 5 .2 –5 .7 –4 .9 8 .0 –1 .3 0 .4
8 District of Columbia Population and Housing Unit Counts

U.S. Census Bureau, 2010 Census

Table 6. 

Rank of Counties by Percent Change in 

Population: 2000 to 2010 

[For information concerning historical counts and geographic change, see “User Notes .” For 

information on confidentiality, nonsampling error, and definitions, see Appendixes]

County/County Equivalent Population Percent change

2010 2000 Rank Percent

District of Columbia . . . . . . . . . . . . . . 601,723 572,059 1 5 .2
Population and Housing Unit Counts District of Columbia 9

U.S. Census Bureau, 2010 Census

Table 7. 

Population by Urban and Rural: 2010

[For information on confidentiality, nonsampling error, and definitions, see Appendixes]

District of Columbia

County/County Equivalent Total 

population

Urban Rural Percent of total 

population

Total

In urbanized 

area

In urban 

cluster Total In place Not in place Urban Rural

 District of Columbia . . . . . . 601,723 601,723 601,723 – – – – 100 .0 –

District of Columbia . . . . . . . . . . . . . 601,723 601,723 601,723 – – – – 100 .0 –
10 District of Columbia Population and Housing Unit Counts

U.S. Census Bureau, 2010 Census

Table 8. 

Population and Housing Units: 1990 to 2010; and Area Measurements and Density: 2010

[For information concerning historical counts and geographic change, see “User Notes .” For information on confidentiality, nonsampling error, and definitions, see Appendixes]

Area measurements in Average per square mile Population Housing units District of Columbia square miles of land

County/County Equivalent

Place Population Housing unit 

 District of Columbia

2010 2000 1990 2010 2000 1990 Total area Land area density density

 . . . . . . . . 601,723 572,059 606,900 296,719 274,845 278,489 68 .34 61 .05 9,856 .2 4,860 .3

District of Columbia . . . . . . . . . . . . . . . 601,723 572,059 606,900 296,719 274,845 278,489 68 .34 61 .05 9,856 .2 4,860 .3

 Washington city . . . . . . . . . . . . . . . . 601,723 572,059 606,900 296,719 274,845 278,489 68 .34 61 .05 9,856 .2 4,860 .3
Population and Housing Unit Counts District of Columbia 11

U.S. Census Bureau, 2010 Census

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12 District of Columbia Population and Housing Unit Counts

U.S. Census Bureau, 2010 Census

Table 9. 

Population and Housing Units: 1990 to 2010; and Area Measurements and Density: 2010

[For information concerning historical counts and geographic change, see “User Notes .” For information on confidentiality, nonsampling error, and definitions, see Appendixes]

District of Columbia

Place

Population Housing units

2010 2000 1990

Percent 

change 

2000 to 

2010 2010 2000 1990

Percent 

change 

2000 to 

2010

 District of Columbia . . . . . . . . . . . . . . . . . . . . . . 601,723 572,059 606,900 5 .2 296,719 274,845 278,489 8 .0

Washington city, District of Columbia . . . . . . . . . . . . . . . 601,723 572,059 606,900 5 .2 296,719 274,845 278,489 8 .0
Population and Housing Unit Counts District of Columbia 13

U.S. Census Bureau, 2010 Census

Table 9. 

Population and Housing Units: 1990 to 2010; and Area Measurements and Density: 2010—Con.

[For information concerning historical counts and geographic change, see “User Notes .” For information on confidentiality, nonsampling error, and definitions, see Appendixes]

Area measurements in square miles Average per square mile of land

District of Columbia

Place

Total area Land area Population density Housing unit density

68 .34 61 .05 9,856 .2 4,860 .3 District of Columbia

68 .34 61 .05 9,856 .2 4,860 .3 Washington city, District of Columbia
14 District of Columbia Population and Housing Unit Counts

U.S. Census Bureau, 2010 Census

Table 10. 

Rank by 2010 Population and Housing Units: 2000 and 2010 

[For information concerning historical counts and geographic change, see “User Notes .” For information on confidentiality, nonsampling error, and definitions, see Appendixes]

Place [2,500 or More Population] Population Housing units

2010 rank 2010 2000 2010 rank 2010 2000

Washington city . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 601,723 572,059 1 296,719 274,845
Population and Housing Unit Counts District of Columbia 15

U.S. Census Bureau, 2010 Census

Table 11. 

Rank of Places by Percent Change in Population: 

2000 to 2010 

[For information concerning historical counts and geographic change, see “User Notes .” For 

information on confidentiality, nonsampling error, and definitions, see Appendixes]

Place [2,500 or More Population] Population Percent change

2010 2000 Rank Percent

Washington city . . . . . . . . . . . . . . . . . . . . . 601,723 572,059 1 5 .19
16 District of Columbia Population and Housing Unit Counts

U.S. Census Bureau, 2010 Census

Table 12. 

Population and Housing Units for Urban Areas: 2010

[For information on confidentiality, nonsampling error, and definitions, see Appendixes]

District of Columbia

Urbanized Area

Urban Cluster

District of Columbia total Total for urban areas crossing 

state lines

Population Housing units Population Housing units

 District of Columbia . . . . . . . . . . . . . . . . . . . . . . 601,723 296,719 (X) (X)

 Urban . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

In urbanized area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

In urban cluster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

 Rural . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

601,723

601,723

–

–

296,719

296,719

–

–

(X)

(X)

(X)

(X)

(X)

(X)

(X)

(X)

URBANIZED AREA

Washington, DC--VA--MD . . . . . . . . . . . . . . . . . . . . . . . . 601,723 296,719 4,586,770 1,829,546
Appendixes 

U.S. Census Bureau, 2010 Census

Appendixes

Several appendixes traditionally found in printed reports are now available in a separate volume. For the 

following, see CPH-2-A, Population and Housing Unit Counts, Selected Appendixes, in print or on the 

Internet at <www.census.gov/prod/cen2010/cph-2-a.pdf> :

Appendix A. Geographic Terms and Concepts

Appendix B. Definitions of Subject Characteristics

Appendix C. Data Collection and Processing Procedures

Appendix D. Questionnaire

Appendix F. Operational Overview and Accuracy of the Data

Appendix G. Residence Rule and Residence Situations for the 2010 Census of the United States

Appendix H. Acknowledgments

This Appendix section contains:

 Appendix E. Maps

Maps District of Columbia E-1

U.S. Census Bureau, 2010 Census

Appendix E.

Maps

DISTRICT OF COLUMBIA

VIRGINIA

MARYLAND

77°

77°

39° 39°

District of Columbia

0 1 2 3 Kilometers

0 1 2 3 Miles LEGEND

MARYLAND State

Note: All boundaries and names are

as of January 1, 2010.

DISTRICT OF COLUMBIA State/County Equivalent
E-2 District of Columbia Maps

U.S. Census Bureau, 2010 Census

Geographic Areas Reference Map Legend

DISTRICT OF COLUMBIA

Geographic Areas Reference Map Legend

Large River, Lake, Water Body,

or Shoreline Lake Erie

Note: All legal and statistical area boundaries and names are as of January 1, 2010. The boundaries shown on this map are for Census Bureau statistical data collection and

tabulation purposes only; their depiction and designation for statistical purposes does not constitute a determination of jurisdictional authority or rights of ownership or

entitlement.

LEGEND

State or Statistically Equivalent

Entity Incorporated Place1 ROME

County or Statistically Equivalent ERIE Entity

1 Map Section

1

 The District of Columbia is statistically equivalent to a state and also treated as statistically equivalent to a county. Washington city is not divided into any subdivisions and thus

serves as the statistical equivalent of a legal county subdivision. The boundaries and name for the county subdivision are the same as the city and not shown on the map.

1

Section Locator
Maps District of Columbia E-3

U.S. Census Bureau, 2010 Census

DISTRICT OF COLUMBIA

Anacostia River

Potomac River

WASHINGTON

76°55’

76°55’

77°5’

77°5’

77°

77°

39°39°

38°55’38°55’

38°50’38°50’

District of Columbia - Section 1

0 0.5 1 1.5 Kilometers

0 0.5 1 1.5 Miles
E-4 District of Columbia Maps

U.S. Census Bureau, 2010 Census

WashingtonArlingtonAlexandria

WEST VIRGINIA

PENNSYLVANIA

Bethesda

Gaithersburg

Rockville

Frederick

Washington

Arlington

Alexandria

Reston

VIRGINIA

VIRGINIA

MARYLAND

MARYLAND

WashingtonBaltimoreNorthern Virginia

(Part)

WASHINGTONARLINGTONALEXANDRIA

DISTRICT OF

COLUMBIA

CALVERT CHARLES

FREDERICK

MONTGOMERY

PRINCE GEORGE'S

CLARKE

FAIRFAX

FAUQUIER

LOUDOUN

SPOTSYLVANIA

STAFFORD

FALLS

CHURCH*

ARLINGTON

WARREN

ALEXANDRIA*

FAIRFAX*

FREDERICKSBURG*

MANASSAS*

MANASSAS

PARK*

PRINCE

WILLIAM

JEFFERSON

MARYLAND

77°

77°

78°

78°

39° 39°

38° 38°

Core Based Statistical Areas, Counties, Independent Cities, and Principal Cities

0 5 10 15 Kilometers

0 5 10 15 Miles

LEGEND

Washington-Baltimore-Northern Virginia Combined Statistical Area

CBSA boundaries and names are as of December 2009. 

All other boundaries and names are as of January 1, 2010.

MARYLAND State

Washington-Arlington-Alexandria Metropolitan Division

MANASSAS* Independent City

WASHINGTON-ARLINGTON-ALEXANDRIA Metropolitan Statistical Area

PRINCE GEORGE'S

County Equivalent

Shoreline

Washington Principal City

County outside District of Columbia

DISTRICT OF COLUMBIA
Maps District of Columbia E-5

U.S. Census Bureau, 2010 Census

WASHINGTON,

DC--VA--MD

MARYLAND

VIRGINIA

WEST

VIRGINIA

77°

77°

39° 39°

Urban Areas

± 0 2 4 6 Kilometers

0 2 4 6 Miles

LEGEND

All legal and statistical area boundaries are as

of January 1, 2010. Urban Areas are based 

on results from the 2010 Decennial Census.

URBANIZED AREA

STATE OR EQUIVALENT AREA