Looking for 1900 census of my grandfather Joseph Miller born 1893 in Newark New Jersey.

Question

He may have been in an orphanage in Cincinnati around that time, along with an older brother (name unknown).

Answer 1

All I find based on what you wrote are,

"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9FB-PHK : accessed 13 April 2015), Joseph D Miller in household of Howard Miller, Wall Township Manasquan borough, Monmouth, New Jersey, United States; citing sheet 2A, family 29, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,986.

"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9N5-4L2 : accessed 13 April 2015), Joseph Miller in household of Jacob Miller, Precinct 1 Camden city Ward 11, Camden, New Jersey, United States; citing sheet 4B, family 156, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,959.

"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9JP-1VB : accessed 13 April 2015), Joseph Miller in household of Jacob Miller, Precinct 1 Jersey City Ward 2, Hudson, New Jersey, United States; citing sheet 13A, family 274, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,976.

"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9JY-WFW : accessed 13 April 2015), Joseph Miller in household of Joseph Miller, Precinct 5 Jersey City Ward 7, Hudson, New Jersey, United States; citing sheet 26B, family 529, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,978.

and I did not limit my search by stae name so this should be all in that census