Notes:
Data source is Gary Lynn Mumma, e-mail gary.mumma@gmail.com
1900 Census, MD, Washington Co., Williamsport
Mumma, A.S., head, june 1854, 45, m 22 yr., b. MD/MD/MD, brick layer
" , F. A.,, wife, July 1859, 41, m 22 yr., 9 children, 8 living, b. MD/MD/MD
" , W. S., son, Dec 1878, 21, married, 0 yr., b. MD/MD/MD, brick layer
" , S. M., dau, Jan 1881, 19, single, b. OH/MD/MD
" , Adeline, dau, June 1883, 16, single, b. MD/MD/MD
" , J. B. M., son, Dec 1887, 12, single, b. MD/MD/MD
" , A.L, son, Mar 1893, 7, single, b. MD/MD/MD
" , M.A., dau, Jun 1895, 4, single, b. MD/MD/MD
" , F. O., son, Jun 1897, 2, single, b. MD/MD/MD
" , Florence, dau-in-law, Nov 1883, m 0 yrs, 0 children, 0 living, b. MD/MD/MD
1910 Census, MD, Washington Co, Williamsport
Mumma, Jacob B., head, 22, m: 4 yrs, b. MD/MD/MD labor tannery
" , Cora K, wife, m: 4 yrs, 0 children born, 0 children living, b. MD/MD/PA
1920 Census Williamsport, Washington, Maryland
Jacob B Mumma 32
Roberta S Mumma 31
Robert M Mumma 10
Jacob B Mumma 6
Anna S Mumma 4 [4 5/12]
Thomas J Mumma 3
Elwood M Mumma 1 [1 2/12]
1930 Census, Clear Spring, Washington, Maryland
Jacob B Mumma 42
Sallie R Mumma 41
Jacob B Mumma 16
Sarah A Mumma 14
Thomas J Mumma 13
Elwood M Mumma 12
Nellie M Mumma 10
1940 Census, Conococheague, Washington, Maryland
Inferred Residence in 1935: Williamsport, Washington, Maryland
Residence in 1935: Williamsport, Washington, Maryland
Jacob B Mumma 52
Sallie R Mumma 49
Elwood Mumma 21
Nellie May Mumma 20