Jacob is enumerated in the 1900 household of his parents at Buffalo, Erie Co., New York. The family home is located on Forest Avenue. Jacob's occupation is Tipewriter and his year of immigration is 1899. The 1900 census data follows:
Christian Birk Head M 47 Germany
Catharine Birk Wife F 44 Canada
Arthur Birk Son M 21 Canada
Jacob M Birk Son M 20 Canada
Anna M Birk Daughter F 17 Canada
Lawson E Birk Son M 16 Canada
Reginald Birk Son M 14 Canada
Ward W Birk Son M 5 NY
Martin Birk Boarder M 21 NY

Jacob is enumerated in the 1910 household of his parents at Buffalo, Erie County. The family home is located on Bird Avenue. Jacob's occupation is Bookkeeper, Auto Store and he is working on wages. The 1910 census data follows:
Christian Birk Head M 56 Germany
Catherine Birk Wife F 53 Canada
Jacob Birk Son M 29 Canada
Anna Birk Daughter F 26 Canada
Reginal Birk Son M 23 Canada
Ward Birk Son M 15 NY

Jacob married Alice COLONY before the 1920 census at Williamsport, Lycoming Co., Pennsylvania. As far as known she and Jacob had no children together. Jacob and Alice are enumerated in the 1920 census and they are renting a house on West Fourth Street. His occupation is Salesman, Automobiles and he is working on wages. His immigration year is 1888 and he is a Naturalized Citizen. The birthplace of his parents is Canada. The 1920 census data follows:
Jacob N Berk Head M 36 Canada
Alice E Berk Wife F 31 PA

There is a Jacob M Birk enumerated in the 1925 NYS household of his father at Buffalo, Erie County. Jacob is aged 45 years.

Jacob is enumerated in the 1930 household of Edward Scholfield at Buffalo. Jacob's occupation is Merchant, Awnings and he is working on his Own Account. Jacob's marital status is Married but his wife is not listed in the Scholfield household. Jacob's year of immigration is 1890 and he is a Naturalized Citizen.

Jacob died aged about 59 years.