Online Spanish American War Indexes, Records and Rosters of Soldiers

U.S., Spanish American War Volunteers Index to Compiled Military Service Records, 1898 (at Ancestry/requires payment) from National Archives Microfilm publication M871: "General Index to Compiled Service Records of Volunteer Soldiers who Served During the War with Spain"

United States Index to Service Records, War with Spain, 1898 at FamilySearch; from National Archives microfilm publication M871

Spanish American War Records and Indexes by State

Colorado Volunteers in the Spanish American War (1898) also includes Colorado Veterans Grave Registration Index, 1862-1949

Indiana
- Indiana Spanish American War Records (at Ancestry/requires payment)
- Indiana Spanish War Muster Rolls Index and United Spanish War Veterans Index

Iowa
- Iowa Soldiers of the Spanish American War
- Iowa Death Index for United Spanish War Veterans

Kansas
- Kansas Troops in the Volunteer Service of the United States in the Spanish and Philippine Wars (Kansas Adjutant General's Report, 1898-1899) lists the names of soldiers who served in the Kansas volunteer troops (the 20th through 23rd Kansas Regiments) during the Spanish-American War (1898) and the Philippine Insurrection (through Oct. 28, 1899)
- Kansas, United Spanish War Veterans Reports of Deaths, 1945-1970 (at Ancestry/requires payment)

Michigan
- Michigan Men in the Spanish American War (at Ancestry/requires payment)

Ohio Soldiers in the War with Spain, 1898-1899 (at Ancestry/requires payment) more than 19,000 listings

Pennsylvania
- Record of Pennsylvania Volunteers in the Spanish-American War, 1898 (at Ancestry/requires payment)
- Pennsylvania, Spanish War Compensation, 1898-1934 (at Ancestry/requires payment)

Texas: United States Volunteers, Spanish-American War Service Records, 1898 from the Texas Adjutant General Service Records Series - select "USV" on the pull down menu

Online Spanish American War Indexes and Records