County Composition of Nineteenth Century Metropolitan Areas, 1850 - 1920

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Code City/State 1850 1860 1870 1880 1900 1910 1920
0160 Albany-Schenectady-Troy, NY Albany Albany Albany Albany Albany Albany Albany
Rensselaer Rensselaer Rensselaer Rensselaer Rensselaer Rensselaer Rensselaer
Schenectady Schenectady Schenectady
0520 Atlanta, GA Fulton* DeKalb DeKalb
Fulton Fulton
0720 Baltimore, MD # Baltimore Baltimore Baltimore Baltimore Baltimore Baltimore Baltimore
Baltimore City*** Baltimore City*** Baltimore City*** Baltimore City*** Baltimore City*** Baltimore City***
1120 Boston, MA # Middlesex Essex Essex Essex Essex Essex Essex
Norfolk Middlesex Middlesex Middlesex Middlesex Middlesex Middlesex
Suffolk Norfolk Norfolk Norfolk Norfolk Norfolk Norfolk
Suffolk Suffolk Suffolk Suffolk Suffolk Suffolk
1160 Bridgeport, CT Fairfield Fairfield Fairfield
1280 Buffalo, NY # Erie Erie Erie Erie Erie Erie
Niagara
1281 Niagara Falls, NY #
1440 Charleston, SC Charleston* Charleston Charleston
1600 Chicago, IL # Cook Cook Cook Cook Cook Cook
Lake, IL Lake, IL Dupage
Lake, IN Lake, IN Lake, IL
Lake, IN

Code City/State 1850 1860 1870 1880 1900 1910 1920
1601 Aurora-Elgin, IL
1602 Gary-Hammond, IN #
1603 Joliet, IL
1604 Lake, IL
1640 Cincinatti-Hamilton, OH-KY-IN Hamilton Hamilton Hamilton Hamilton Hamilton Hamilton Hamilton
Kenton Kenton Campbell Campbell Campbell, KY Campbell, KY Campbell, KY
Kenton Kenton Kenton, KY Kenton, KY Kenton, KY
1680 Cleveland, OH Cuyahoga Cuyahoga Cuyahoga Cuyahoga Cuyahoga
1840 Columbus, OH Franklin Franklin Franklin Franklin
2000 Dayton-Sprinfield, OH-KY-IN Montgomery* Montgomery Montgomery
2001 Springfield, OH # Clark
2080 Denver, CO # Arapahoe* Denver Denver
2081 Boulder-Longmont, CO#
2120 Des Moines, IA Polk* Polk Polk
2160 Detroit, MI Wayne Wayne Wayne Wayne Wayne
2240 Duluth-Superior, MN-WI St. Louis St. Louis St. Louis
Douglas, WI Douglas, WI Douglas, WI
2360 Erie, PA Erie Erie Erie
2440 Evansville, IN-KY Vanderburg* Vanderburg Vanderburg
3000 Grand Rapids, MI Kent* Kent Kent

Code City/State 1850 1860 1870 1880 1900 1910 1920
3240 Harrisburg-Leban-Carlisle,PA Dauphin Dauphin Cumberland
Dauphin
3280 Hartford, CT Hartford* Hartford Hartford
3281 Bristol, CT
3282 Middletown, CT
3283 New Britian, CT
3480 Indianapolis, IN Marion Marion Marion Marion
3760 Kansas City, MO-KS Wyandotte Jackson Jackson Jackson
Jackson Wyandotte, KS Wyandotte, KS Wyandotte, KS
4360 Lincoln, NE Lancaster* Lancaster Lancaster
4480 Los Angeles-Long Beach, CA # Los Angeles* Los Angeles Los Angeles
4481 Anaheim-Santa Ana, CA
4520 Louisville, KY-IN Jefferson, KY Jefferson, KY Jefferson, KY Jefferson Jefferson Jefferson
Clark, IN Clark, IN Clark, IN Clark, IN Clark, IN Clark, IN
Floyd, IN Floyd, IN Floyd, IN Floyd, IN Floyd, IN Floyd, IN
4760 Manchester, NH Hillsborough Hillsborough Hillsborough
4920 Memphis, TN-AR-MS Shelby* Shelby Shelby
5080 Milwaukee-Waukesha, WI Milwaukee Milwaukee Milwaukee Milwaukee Milwaukee
5120 Minneapolis-St. Paul, MN Hennepin* Hennepin Hennepin
Ramsey* Ramsey Ramsey

Code City/State 1850 1860 1870 1880 1900 1910 1920
5360 Nashville, TN Davidson* Davidson Davidson
5480 New Haven-Meriden, CT New Haven New Haven New Haven New Haven New Haven
Litchfield Litchfield
5560 New Orleans, LA Jefferson Orleans Orleans Jefferson Orleans Orleans Orleans
Orleans Orleans
5600 New York, NY # Kings Kings Kings Kings Kings Kings Bronx
New York New York New York New York New York Nassau Kings
Richmond Westchester Richmond Richmond Queens* New York Nassau
Essex, NJ Richmond Westchester Westchester Richmond Queens New York
Hudson, NJ Essex, NJ Essex, NJ Bergen, NJ Rockland Richmond Queens
Hudson, NJ Hudson, NJ Essex, NJ Westchester Rockland Richmond
Passaic, NJ Hudson, NJ Bergen, NJ Westchester Rockland
Union, NJ Passaic, NJ Essex, NJ Bergen, NJ Westchester
Union, NJ Hudson, NJ Essex, NJ Bergen, NJ
Middlesex, NJ* Hudson, NJ Essex, NJ
Morris, NJ* Middlesex, NJ Hudson, NJ
Passaic, NJ Morris, NJ Middlesex, NJ
Union, NJ Passaic, NJ Morris, NJ
Somerset, NJ Passaic, NJ
Union, NJ Somerset, NJ
Union, NJ

Code City/State 1850 1860 1870 1880 1900 1910 1920
5601 Nassau-Suffolk, NY
5602 Bergen-Passaic / Patterson-Clifton, NJ
5603 Jersey City, NJ
5604 Middlesex-Somerset, Hunt, NJ
5605 Newark, NJ
5920 Omaha, NE-IA Douglas* Douglas Douglas
Pottawattamie, IA;
6120 Peoria, IL Peoria Peoria Peoria
Tazewell
6160 Philadelphia, PA-NJ Montgomery Montgomery Delaware Delaware Delaware Delaware Bucks
Philadelphia Philadelphia Montgomery Montgomery Montgomery Montgomery Delaware
Camden, NJ Philadelphia Philadelphia Philadelphia Philadelphia Montgomery
Camden, NJ Camden, NJ Burlington, NJ* Burlington, NJ Philadelphia
Camden, NJ Camden, NJ Burlington, NJ
Camden, NJ
Gloucester, NJ
6280 Pittsburgh, PA Allegheny Allegheny Allegheny Allegheny Allegheny Allegheny Allegheny
Westmoreland* Westmoreland Beaver
Westmoreland
6400 Portland, ME Cumberland Cumberland Cumberland

Code City/State 1850 1860 1870 1880 1900 1910 1920
6440 Portland- Multnomah Multnomah Multnomah
Vancouver, OR-WA
6441 Vancouver, WA
6480 Providence, RI Kent Kent Bristol Bristol Bristol Bristol
Providence Providence Kent Kent Kent Kent
Providence Providence Providence Providence
6481 Fall River, MA-RI Bristol, MA* Bristol, MA Bristol, MA
6482 Pawtuckett,
RI-MA
6680 Reading, PA Berks* Berks Berks
6760 Richmond-Petersburg, VA # Henrico Chesterfield Chesterfield Henrico Richmond City***
Henrico Henrico Richmond City***
Manchester City***
Richmond City***
6761 Petersburg-Col. Heights-Hopewell, VA
6840 Rochester, NY Monroe Monroe Monroe Monroe Monroe
7000 St. Joseph, MO Buchanan* Buchanan Buchanan
7040 St. Louis, MO-IL# St. Louis St. Louis St. Louis St. Louis St. Louis St. Louis St. Louis
St. Louis City*** St. Louis City*** St. Louis City*** St. Louis City***
St. Clair, IL Madison, IL Madison, IL
St. Clair, IL St. Clair, IL

Code City/State 1850 1860 1870 1880 1900 1910 1920
7160 Salt Lake City-Ogden, UT # Salt Lake Salt Lake Salt Lake
7161 Ogden, UT
7240 San Antonio, TX Bexar Bexar Bexar
7360 San Francisco-Oakland, CA # San Francisco Alameda Alameda Alameda Alameda Alameda
San Francisco San Francisco San Francisco Marin Contra Costa
San Francisco Marin
San Francisco
San Mateo
7361 Oakland, CA
7520 Savannah, GA Chatham Chatham Chatham
7560 Scranton-Wilkes-Barre, Hazleton, PA Lackawanna* Lackawanna Lackawanna
7561 Wilkes-Barre-Hazleton,PA Luzerne Luzerne Luzerne
7600 Seattle-Everett, WA King King King
Snohomish
8000 Springfield-Holyhoke, MA Hampden Hampden Hampden
Hampshire Hampshire Hampshire
8160 Syracuse, NY Onondaga Onondaga Onondaga Onondaga
8400 Toledo, OH-MI Lucas Lucas Lucas Lucas
8480 Trenton, NY Mercer* Mercer Mercer
8680 Utica-Rome, NY Oneida Oneida Herkimer
Oneida

Code City/State 1850 1860 1870 1880 1900 1910 1920
8840 Washington DC-MD-VA-WV # Arlington, VA Arlington, VA Arlington, VA Washington Washington Washington
Washington Washington Washington Alexandria Alexandria Alexandria
City*** City*** City***
Arlington, VA Arlington, VA Arlington, VA
9160 Wilmington, DE-NY-MD New Castle* New Castle New Castle
Salem
9240 Worcester, MA Worcester Worcester Worcester Worcester

Table Notes:

* County became part of metropolitan area in 1890.
*** Independent City, not politically incorporated within a county.

# City-Specific Notes:

Baltimore, MD Baltimore became an independent city in the 1850s.

Bergen/Passaic, NJ In 1970, Bergen and Passiac counties were included in the Patterson/Clifton, NJ metro area. Passaic County remained in the Patterson/Clifton metro in 1980 but Bergen County was defined as part of the New York metro area. In 1990, the two counties were defined as their own metro area.

Boston, MA The 1940 and 1950 samples use New England County Metropolitan Areas. All other samples use towns and cities rather than counties.

Boulder, CO Boulder was included in the Denver metro area in 1970 and 1980 but was made a separate Primary Metro in 1990.

Buffalo, NY The Census Bureau identified Niagara Falls as a Primary Metro in 1990. From 1920 to 1980 Niagara Falls is separate metropolitan area.

Chicago, IL Gary-Hammond, IN is designated as a separate metropolitan area in 1970.

Denver, CO Between 1900 and 1910, Denver became an independent city. In 1900 Denver ws a part of Arapahoe County but annexed territory from that county and became independent by 1910. The only area meeting the criteria for metropolitan status in 1910 and 1920 was the city of Denver. Boulder was included in the Denver metropolitan area in 1970 and 1980 but was made a separate Primary Metro in 1990.

Gary-Hammond, IN See Chicago, above.

Los Angeles, CA San Bernardino was included in Los Angeles in 1930 but became an independent metropolitan area from 1930 through 1990.

New York, NY The New York metropolitan area has substantial rearrangement of counties due to the splitting of the area into smaller Primary Metros. This causes some counties, such as Bergen, to move among multiple metro areas over the last forty years. (see Bergen/Passaic, above, and Patterson/Clifton, below).

Patterson/Clifton, NJ In 1970, Bergen and Passiac counties were included in the Patterson/Clifton, NJ metro area. Passaic County remained in the Patterson/Clifton metro in 1980 but Bergen County was defined as part of the New York metro area. In 1990, the two counties were defined as their own metro area.

Richmond, VA The independent city of Manchester is included in the Richmond metropolitan area in 1900 and 1910. Richmond annexed Manchester between 1900 and 1910. Since Richmond also annexed part of Henrico County, the unannexed remainder of Henrico County failed to meet the criteria for inclusion in the metro area in 1920.

Riverside-San Bernardino, CA See Los Angeles, above.

St. Louis, MO The city of St. Louis was an independent city by 1880.

Salt Lake City, UT Ogden, UT, was a separate metropolitan area in 1940 and 1950 but was combined with Salt Lake City in 1980.

San Francisco, CA Alameda and Contra Costa counties were split from the San Francisco metropolitan area in 1990 and became the Oakland metropolitan area. Solano County was part of the San Francisco metro area in 1940 and 1950, failed to meet metro criteria in 1960 but emerged as the separate metro area of Vallejo from 1970 to 1990.

Springfield, OH Springfield was a separate metropolitan area from 1920 to 1980 but was included in the Dayton metropolitan area in 1990.

Vallejo, CA See San Francisco, above.

Washington, DC Alexandria was an independent city by 1900. Arlington County changed its name from Alexandria County between 1910 and 1920.

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