Washington County was created on January 2, 1818 (Territorial Laws, 1817-1818, p. 39) and was formed from St. Clair County. Present area, or parts of it, formerly included in: St. Clair County (1790–1818) and Randolph County (1803–1818) .
The County was named for George Washington, a Revolutionary General, statesman, and first president of the United States. Commander in chief of the American forces during the Revolution (1775–1783) , and president of the second Constitutional Convention, he was the first president of the newly independent United States (1789–1797) . The County Seat is ? . Prior County Seats was Covington (1818–1831) and Nashville (1831-Present) .

The Official County website is located at N/A . All departments below at located at the Washington County Courthouse, 101 E. St. Louis Street, Nashville, IL 62263 , unless a different address is listed below.
NOTE: The record dates below are from the earliest date to present time.
Washington County Circuit Court Clerk has Probate Records from 1818 and Court Records from 1818 and is located at the address above. Phone Number: (618) 327-4800, ext. 305
Washington County Recorder has Land Records from 1817 and is located at the courthouse. Phone Number: (618) 327-4800, ext. 300
Washington County Clerk has Birth / Death Records from 1877 and Marriage Records from 1831 and is located at the courthouse. Phone Number: (618) 327-4800, ext. 300
County Treasurer’s responsibilities include the statutory duties required as County Treasurer and as Ex-Officio County Collector of Real Estate Property Taxes and Drainage District Taxes for the entire county.
Below is a list of online resources for Washington County Court Records. Email us with websites containing Washington County Court Records by clicking the link below:

Birth, marriage, and death records are connected with central life events. They are prime sources for genealogical information.
Illinois Department of Public Health, Division of Vital Records, 605 W. Jefferson St., Springfield, IL 62702-5097. It can take up to 6 weeks to get a vital record from Illinois.
A number of resources are available for individuals doing genealogical research using vital records filed in the state of Illinois. Births and deaths before January 1, 1916 and marriages before January 1, 1962 are recorded only in the office of the county clerk where the event occurred. Most county clerks have indexes to the records that are prior to 1916 that are available for the purpose of genealogical research. These indexes generally provide the name, date and place of occurrence and are located in county courthouses located throughout the state. Although self-service access to the indexes is generally permitted, the law limits physical access to the individual records to the clerk's staff. When you locate a record from the index, it will be necessary for the clerk to pull the record for you once you have paid the appropriate search fee. Please check with the county clerk for fees and policies on reviewing indexes.
Below is a list of online resources for Washington County Vital Records. Email us with websites containing Washington County Vital Records by clicking the link below:

Few, if any, records reveal as many details about individuals and families as do government census records. Substitute records can be used when the official census is unavailable
Countywide Records: Federal Population Schedules that exist for Washington County, Illinois are 1820, 1830, 1840, 1850, 1860, 1870, 1880, 1900, 1910, 1910, 1920 and 1940.Other Federal Schedules to look at when researching your Family Tree in Washington County, Illinois are Industry and Agriculture Schedules availible for the years 1850, 1860, 1870 and 1880.
The Mortality Schedules for the years 1850, 1860, 1870 and 1880.There are free downloadable and printable Census forms to help with your research. These include U.S. Census Extraction Forms and U.K. Census Extraction Forms.
Below is a list of online resources for Washington County Census Records. Email us with websites containing Washington County Census Records by clicking the link below:
Below is a list of online resources for Washington County Maps. Email us with websites containing Washington County Maps by clicking the link below:
Below is a list of online resources for Washington County Military Records. Email us with websites containing Washington County Military Records by clicking the link below:
There are many churches and cemeteries in Washington County. Some transcriptions are online. A great site is the Washington County Tombstone Transcription Project.
Below is a list of online resources for Washington County Cemetery & Church Records. Email us with websites containing Washington County Cemetery & Church Records by clicking the link below:
Below is a list of online resources for Washington County Family Trees, web forums and other family type information. Email us with websites containing Washington County Family Trees, web forums and other family type information by clicking the link below: