| Sources | [S4]  1870 US Federal Census, (www.ancestry.com).Name: Anton Opp Estimated Birth Year: abt 1866 Age in 1870: 4 Birthplace: Illinois Home in 1870: Belleville, St Clair, Illinois Race: White Gender: Male
 
 
[S38]  1880 US Federal Census.Name: Anton OPP Age: 15 Estimated birth year: <1865> Birthplace: Illinois Occupation: Nail Mill Laborer Relationship to head-of-household: Son Home in 1880: West Belleville, St. Clair, Illinois Marital status: Single Race: White Gender: Male Father's birthplace: PRUSSIA Mother's name: Margretha OPP Mother's birthplace: BAVARIA Cannot  Image Source: Year: 1880; Census Place: West Belleville, St. Clair, Illinois; Roll: T9_247; Family History Film: 1254247; Page: 328A; Enumeration District: 45; Image: 0326.
 
 
[S19]  1900 US Federal Census, (www.ancestry.com).Name: Anthony Opp Home in 1900: Los Angeles Ward 2, Los Angeles, California Age: 34 Estimated birth year: 1866 Birthplace: Illinois Race: White Relationship to head-of-house: Son  Image source: Year: 1900; Census Place: Los Angeles Ward 2, Los Angeles, California; Roll: T623 88; Page: 5B; Enumeration District: 7.
 
 
[S30]  1910 US Federal Census, (www.ancestry.com).single,  lived with sister and brother-in-law Gustav Nitsch
 Name: Anthony Opp Age in 1910: 43 Estimated birth year: abt 1867 Birthplace: Illinois Home in 1910: Los Angeles, Los Angeles, California  Race: White Gender: Male Series: T624 Roll: 83 Part: 3 Page: 183A Year: 1910
 
 
[S926]  Find-A-Grave, (www.findagrave.com).Anthony Opp
 Birth: 10 Aug 1865 Illinois, USA
 Death: 18 Jul 1915 (aged 49) Los Angeles, Los Angeles County, California, USA
 Burial: Calvary Cemetery, Los Angeles, Los Angeles County, California, USA
 Plot: Section B
 Memorial #: 155081465
 Family Members
 Parents
 Margaretha Erstein Opp                	1834-1909
 Siblings
 Jakob E. Opp                	1856-1925
 Created by: Steve and Linda Malkson (48608432)
 Added: 16 Nov 2015
 URL: https://www.findagrave.com/memorial/155081465/anthony-opp
 Citation: Find a Grave, database and images (https://www.findagrave.com : accessed 28 October 2020), memorial page for Anthony Opp (10 Aug 1865?18 Jul 1915), Find a Grave Memorial no. 155081465, citing Calvary Cemetery, Los Angeles, Los Angeles County, California, USA ; Maintained by Steve and Linda Malkson (contributor 48608432) .
 
 
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