The data below comes from Original Documents from the National Archives:

• Compiled Service Records of Confederate Soldiers
  These records contain card abstracts of entries relating to each soldier as found in original muster rolls, returns, rosters, payrolls, appointment books, hospital registers, Union prison registers and rolls, parole rolls, and inspection reports. NARA M331. Compiled service records of Confederate officers and enlisted men who did not belong to any particular regiment, separate company or comparable unit, or special corps Or Go Directly to the State and Browse the names: Alabama, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Texas, Virginia
  
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• Compiled Service Records of Confederate General and Staff Officers, and Nonregimental Enlisted Men
  NARA M331. Compiled service records of Confederate officers and enlisted men who did not belong to any particular regiment, separate company or comparable unit, or special corps. These records contain card abstracts of entries relating to each soldier as found in original muster rolls, returns, rosters, payrolls, appointment books, hospital registers, Union prison registers and rolls, parole rolls, and inspection reports. They may also contain the originals of any papers relating solely to a particular soldier. Browse by military unit, then name of soldier, or use the search box related to this title.
  
  
• Organization Index to Pension Files of Veterans Who Served Between 1861 to 1900
  In 1871, the US government established the Southern Claims Commission to address southerners' petitions for compensation of supplies, livestock, and other items taken by the Union troops during the Civil War. More than 20,000 claims were filed. These testimonial files include first-person accounts of how civilians survived the war, detailed circumstances regarding loss of property, and accounts of each family's history and loyalty to the Union cause.
  Or Go Directly to the State and Browse the names: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Dakota Territory, Washington D.C., Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indian Territory, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Maine, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming
  
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• Southern Claims Commission Records
  In 1871, the US government established the Southern Claims Commission to address southerners' petitions for compensation of supplies, livestock, and other items taken by the Union troops during the Civil War. More than 20,000 claims were filed. These testimonial files include first-person accounts of how civilians survived the war, detailed circumstances regarding loss of property, and accounts of each family's history and loyalty to the Union cause.
  
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• Case Files of Applications from Former Confederates for Presidential Pardons ("Amnesty Papers"), 1865-67
  These case files are organized by state, then by petitioner's last name. The majority is predictably from the south, although a few northern states are represented. Applications for pardon were submitted to President Andrew Johnson by former Confederates excluded from the provisions of his amnesty proclamation of May 29, 1865, together with affidavits, oaths of allegiance, recommendations for executive clemency, and other accompanying papers. Most case files are 3-6 handwritten pages, some are longer.
  
  
• 1860 U.S. Federal Census - Population
  This particular census is especially helpful in researching the Civil War era and the soldiers who fought in the imminent conflict. Information about each member of a household as of June 1, 1860, includes age, race, occupation, real and personal estate values, birth place, if married within the year, and if a person was deaf, dumb, blind, insane, idiotic, pauper, or convict. Relationships are not detailed until the 1880 census.
  
  Browse the 1860 US census by state, county, and civil division.
  
  
• Confederate Papers Relating to Citizens or Business Firms, 1861-65
  The images in this series are from National Archives Microfilm Publication M346, Confederate Papers Relating to Citizen or Business Firms. They are taken from Record Group 109, War Department Collection of Confederate Records. They reproduce a series of more than 650,000 vouchers and other related documents most of which date from 186 to 1865.
  
  
• Mathew B Brady Collection of Civil War Photographs
  Mathew B Brady and many of the decade's best photographers created the photographs in this collection. There are detailed portraits of notable men of the era, as well as photos of soldiers, living and dead, battlefields, scarred landscapes, and cities burned and bombed by invading troops. They portray the horrors of war and images of life in camp. They represent photojournalism in its infancy and present us with real-life interpretations of our nation at war with itself. OR BROWSE THE COLLECTION

The data below comes from Ancestry.com:

• Search Civil War Service Records
  The Civil War Compiled Military Service Records are part of a historic effort to compile and link all available records of soldiers serving in individual states during the Civil War. This database is a listing of over 5.3 million men who served in the war. Taken from records housed in the National Archives, each record provides the soldier's name, company, and unit. Also provided is the individual's rank when inducted and rank when discharged. For researchers of ancestors who may have served in the American Civil War this can be an informative database.

• American Civil War Soldiers
  This section, the soldier records, may contain any of the following information about an individual soldier: the soldier's name, residence, date of entry, regiments, companies, rank, promotions, transfers, events (such as POW, wounded, etc.) and how and where the soldier exited the military (discharge, desertion, muster out, or death). Some states also include in their official records a soldier's birthplace, age at enlistment, occupation, and physical description
  
  
• Civil War Pension Index: General Index to Pension Files, 1861-1934 Index
  One of the defining events in American history, the Civil War involved millions of men who served the United States and the Confederate States. Millions of these men, or their dependents, applied for pension support from the federal government. These application cards (for Federal, not Confederate pensions) were indexed by the Pension Office and kept by the National Archives. This database is an index to nearly 2.5 million of these application cards. Each record includes the veteran's name and state in which he, or his dependents, filed the application. If a widow or a child filed the application, their name is provided. Because these pension files were for federal benefits, this collection only contains the names of Union veterans.
  
  
• American Civil War General Officers
  Historical Data Systems has compiled and linked a wide array of record types including state rosters, pension records, regimental histories, photos, and journals. The genealogical value of this record is immeasurable. More than authoritative names and dates, this database connects researchers with the history their ancestors lived. The collection is divided into four sections, soldier records, regiment records, battle histories, and officer records. This section of the database contains detailed information on all officers who attained the rank of Brigadeer General or higher.
  
  
• Confederate States Field Officers
  The costliest war in the history of the United States, the Civil War involved hundreds of thousands of men on both sides of the conflict. Originally published in the early 1900s, this database is a listing of men who served the Confederate States as field officers. In addition to listing the soldier's name, it also provides the soldier's rank, and military unit. It contains the names of over 5,000 men. For those persons seeking ancestors who may have served the Confederate States during the American Civil War, this can be a helpful database.
  
  
• American Civil War Battle Summaries
  The collection is divided into four sections, soldier records, regiment records, battle histories, and officer records. This section of the database contains short histories for some of the most important battles in the American Civil War.
  
  
• American Civil War Battle Regiments
  The American Civil War Research Database is an historic effort to compile and link all available records of common soldiers in the Civil War. This database makes it easier than ever before to find information on ancestors who fought in the Civil War.
  
  
• Civil War Prisoner of War Records, 1861-1865
  This database contains records relating to Civil War Prisoners of War (POW). The database is comprised of four National Archives (NARA) microfilm series (M1303, M598, M2702, and M918). Microfilm series M1303 contains records relating to Federal or Union POWs that were held by Confederate authorities at Camp Sumter, Andersonville, Georgia between February 1864 and April 1865.
  
  
• Search the War of the Rebellion
  This database is comprised of a work called A Compendium of the War of Rebellion It is divided into essentially three parts. The first provides statistical and organizational information of the Armies and other branches of the War. Information found in this first part includes a list of enlistments and losses, the names of all the national cemeteries and where they are located, a mostly completed list of regiments, battalions, batteries, and independent companies arranged by state, a list of the regiments that lost over 50 men in battle, and an alphabetical list of heads of brigades and other large organizations. The second part tells of the involvement of the Union in several battles and other important events. Most of these events are listed chronologically by state. The last part gives a history of each Regiment, Battalion, Battery, and organization that served in the War for the Union. This section is arranged alphabetically by state then by the following order: Calvary, Artillery, Heavy and Light, Engineers, Sharpshooters, and Infantry. This work has proven to be a highly valuable source for researchers of the Civil War and of this era as it is "the most monumental war record ever undertaken and successfully completed by a single individual" (A Compendium of the War of Rebellion, Introduction).