30th Regiment, Illinois Infantry
The 30th Regiment, Illinois Infantry was organized at Camp Butler, Illinois, and mustered in August 28, 1861. It mustered out July 16 and discharged at Chicago, Illinois, July 24, 1865. 
For more information on the history of the 30th Regiment, Illinois Infantry, see the following:
- Wikipedia (accessed 26 July 2011) An article and links for the 30th Illinois Volunteer Infantry Regiment.
- The Civil War Archive (accessed 26 July 2011) Brief history of the 30th Regiment Infantry.
Companies in this Regiment with County of Origin
Men often enlisted in a company recruited in the counties where they lived though not always. After many battles, companies might be combined because so many men were killed or wounded. However if you are unsure which company your ancestor was in, try the company recruited in his county first.
The following counties of origin are taken from the Adjutant General's Report, found on the Illinois Civil War Rosters web site. Roster pages are from the same report found on the Internet Archives web site. The rosters show the men who served in each regiment, their residences, dates of enlistment and mustering out, and other remarks.
- Company B - many men from Sangamon and Union counties - Sangamon and Union county web sites - Roster, vol. 2, pages 508-511.
- Company C - many men from Randolph County - Randolph County web site - Roster, vol. 2, pages 511-514.
- Company D - (O'Harnett's Cavalry Company) many men from Crawford County - Crawford County web site - Roster, vol. 2, pages 514-517.
- Company E - many men from Randolph County - Randolph County web site - Roster, vol. 2, pages 517-520.
- Company F (O'Harnett's Cavalry Company) - many men from Clark and Edgar counties - Clark and Edgar county web sites - Roster, vol. 2, pages 521-523.
- Company H - many men from Clinton and Macoupin counties - Clinton and Macoupin county web sites - Roster, vol. 2, pages 526-529.
- Company I - many men from Bond and Clinton counties - Bond and Clinton county web sites - Roster, vol. 2, pages 529-532.
- Unassigned Recruits - Roster, vol. 2, pages 535-536.
- Unassigned Drafted and Substitute Recruits - Roster, vol. 2, page 536.
- Beginning United States Civil War Research gives steps for finding information about a Civil War soldier. It covers the major records that should be used. Additional records are described in ‘Illinois in the Civil War’ and ‘United States Civil War, 1861 to 1865’ (see below).
- National Park Service, The Civil War Soldiers and Sailors System, is searchable by soldier's name and state. It contains basic facts about soldiers on both sides of the Civil War, a list of regiments, descriptions of significant battles, sources of the information, and suggestions for where to find additional information.
- Illinois in the Civil War describes many Confederate and Union sources, specifically for Illinois, and how to find them.. These include compiled service records, pension records, rosters, cemetery records, Internet databases, published books, etc.
- United States Civil War, 1861 to 1865 describes and explains United States and Confederate States records, rather than state records, and how to find them. These include veterans’ censuses, compiled service records, pension records, rosters, cemetery records, Internet databases, published books, etc.
- Illinois Civil War Rosters from the Adjutant General's Report, 30th Regiment (accessed 10 May 2011) includes rosters of all the regiments and information on the different companies in each regiment.
- Illinois State Archives - Illinois Civil War Muster and Descriptive Rolls Database (accessed 14 June 2011). Search by residence, unit, regiment, company or soldier.
- The ILGenWeb Civil War Scrapbook, (accessed 26 July 2011) contains links to various documents such as personal letters, military papers, articles, histories, obituaries, biographies, etc. Documents are listed by regiment, then by the soldier and his company.
- McDonald, G. B. A History of the 30th Illinois Veteran Volunteer Regiment of Infantry. (Sparta, Ill: Sparta news, 1916).FHL Collection. FHL US/CAN Fiche 6084222. Other libraries with this book.
- Sample, Alvan E. A History of Company "A", 30th Illinois Infantry: The Names of All Who Belonged to the Company And, As Far As Known, What Became of Them. Also a List of Letters from Some of Those Still Living. (1907). Library with this book. View online at Internet Archives.
- National Park Service, The Civil War Soldiers and Sailors System, (accessed 10 May 2011).