As of June 1900 (age 42), Catherine had 1 child, who was living. She was a housewife. She died at Hester Rest Home in Dayton, aged 90 years old, and is buried in Memorial Park Cemetery in Dayton, Ohio.
Sources
"United States Census, 1860," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:MCLR-K6L : accessed 6 November 2015), Catharina Schwartz in household of Albert Schwartz, The Town Of Wavedy Pee Pee Tp, Pike, Ohio, United States; from "1860 U.S. Federal Census - Population," database, Fold3.com (http://www.fold3.com : n.d.); citing p. 135, household ID 923, NARA microfilm publication M653 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 805,024.
"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M6LN-DD6 : accessed 6 November 2015), Catherine Schwartz in household of Albert Schwartz, Ohio, United States; citing p. 7, family 55, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,756.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M8S6-1H9 : accessed 6 November 2015), Catherine Swartz in household of Albert Swartz, Pee-Pee, Pike, Ohio, United States; citing enumeration district 129, sheet 128D, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 1058; FHL microfilm 1,255,058.
"Ohio, County Marriages, 1789-2013," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XZN3-52Z : accessed 6 November 2015), Franklin L. Maag and Catharine Schwartz, 10 May 1882; citing Pickaway, Ohio, United States, reference 1044; county courthouses, Ohio; FHL microfilm 1,927,441.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MM6H-ZQR : accessed 6 November 2015), Catherine C Maag in household of Frank L Maag, Harrison Township, North Precinct, Montgomery, Ohio, United States; citing sheet 10B, family 208, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,241,308.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MLF6-VYC : accessed 6 November 2015), Cathrine C Maag in household of Frank L Maag, Dayton Ward 4, Montgomery, Ohio, United States; citing enumeration district (ED) ED 69, sheet 7A, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,375,229.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MDT2-925 : accessed 6 November 2015), Catharine C Maag in household of L Frank Maag, Dayton Ward 4, Montgomery, Ohio, United States; citing sheet 11A, family 258, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,821,420.
"Ohio Deaths, 1908-1953," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X6FX-7PV : accessed 6 November 2015), Catherine C Maag, 18 Dec 1947; citing , reference certificate; FHL microfilm 2,246,452.