Warren County Ohio Census Records
This page is part of the Warren County Ohio GenWeb project
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Warren County Ohio Census Records

1820 1830 1840 1850 1860 1870
1880 1890 1900 1910 1920 1930

General Information

This page is intended to provide a place to record census transcriptions which are submitted to the Warren County OhGenWeb site. If there is no link to the above census years then no data has yet been submitted for that census. Your contribution would be appreciated, even if it is only one family on one page of the census.

The printed census records available for Warren County include

I have read that

I do not know if any of the original census records records still exist for Warren County.

We are fortunate in Southwestern Ohio that the Warren County Genealogical Society and the Warren County Historical Society both have a complete set of census microfilms for Warren County. In addition, the Cincinnati and Hamilton County Public Library is one of the few libraries in the United States which has all census microfilms for all states for all years.

Each census was supposed to completed in a given length of time and record the required information as of a specified "Enumeration Date" rather than the date that the household was visited. For more details see the Enumerator Instructions that have been placed on line by the University of Minnesota

United States Census Military Resources

Census Year
Status "as of"
Enumeration period
N.A.R.A. microfilm for Warren County
2 August 1790
9 months
No Census
4 August 1800
9 months
No Census
6 August 1810
9 months
7 August 1820
6 months
series M33, roll 87
1 June 1830
6 months
series M19, roll 142
1 June 1840
9 months
series M704, roll 431
1 June 1850
5 months
series M432, roll 737
1 June 1860
5 months
series M653, roll 1047
1 June 1870
5 months
series M593, roll 1277
1 June 1880
30 days
series T9, rolls 1074 & 1075
Soundex (Phonetic Index) T767 (143 rolls)
1 June 1890
30 days

Most of the 1890 population schedules (including those for Warren County) were badly damaged by a fire in the Commerce Department Building in January 1921.

Veterans Schedule: series M123, roll 65

1 Jun 1900
30 days
series T623, roll 1330
Soundex (Phonetic Index) T1065 (395 rolls)
Enumeration Districts
15 April 1910
series T624, roll 1238
1 January 1920
30 days
series T625, roll 1447
Soundex/Miracode Index T1272 (418 rolls)
1 April 1930
series T626, roll 1890
1940 1 Apr 1930 30 days beginning June 1 series T627, roll 3164

The enumerator was supposed to record the information for all members of the household who were alive on the "Enumeration Date" even though they may have passed away by the time the enumerator visited the household. Age was supposed to be "as of their last birthday". The age of children under one was recorded in months.

1820 1830 1840 1850 1860 1870
1880 1890 1900 1910 1920 1930

NOTICE: All documents and electronic images placed on the Warren County OHGenWeb site remain the property of the contributors, who retain publication rights in accordance with US Copyright Laws and Regulations. These documents may be used by anyone for their personal research. Persons or organizations desiring to use this material, must obtain the written consent of the contributor, or their legal representative, and contact the listed Warren County OHGenWeb coordinator with proof of this consent.

This page created 1 Sepember 2003 and last updated 22 February, 2012
© 2003-2005  Arne H Trelvik  All rights reserved