City directories & Sanborn Fire Insurance Maps are a great place to start. These and many other materials are available in the research center.
Trumbull County Farm and Business Directory, 1951-1953
Warren, (includes Niles & Girard) directories: 1921
Warren, (includes Niles & Newton Falls. From 1978 to 1984 these also include Cortland) directories: 1955, 1961, 1963, 1967, 1969, 1971, 1973, 1978, 1980, 1982, 1984
Youngstown, OH (most cover only the City of Youngstown. Certain volumes also include Struthers, Girard, Campbell, McDonald, Poland, Canfield and Lowellville) directories: 1869, 1872, 1875/1876, 1877 – Present
Sanborn Fire Insurance Maps
Tod Post #29 Grand Army of the Republic Collection
Of special note to those researching Civil War veterans is the Tod Post #29 Grand Army of the Republic Collection. This collection includes minute books of Tod Post, clippings, cemetery data, official rosters, photographs, and ephemera. Tod Post #29 G.A.R. was officially founded in March 1880, taking their name from Ohio’s Civil War governor, David Tod, who was a native of Youngstown. The post formally closed in 1945 with the demise of its last member. The collection includes published and unpublished works associated with the Civil War, Spanish-American war and related subjects. The collection also includes a partial set of the War of the Rebellion series; regimental histories; state level histories of units and battles; background histories of participants in the war; and published rosters for Ohio and Pennsylvania.
The collection includes Minute Books for the post, 1880-1945; Financial Records, 1868-1886 (not inclusive); Quarterly Reports, 1886-1899; and Member Information, including details about service. There are also records form auxiliary groups including: Ladies Relief Corps, 1885-1898; Office Soldiers & Sailors Relief Commission, 1907-1912; and Auxiliary of United Spanish War Veterans – Dept. of Ohio, 1900-1927. There is a series of Annual Encampment Reports and Programs from the Department of Ohio, G.A.R. dating from 1892 (26th)-1927 (61st); National Encampments, G.A.R. 1887 (21st)-1924 (58th). There is a sample of programs from other State level Departments of the G.A.R.
Original Ledgers include the Medical Report and Morning Report books for the 12th Ohio Volunteer Cavalry, 1864-1865 during their campaign in Kentucky. Kirkbride Post #600 G.A.R. minute book for 1886-1914 is also in this collection.
Finding Aids available at the file level.