Carl married Luisa Martz on 30 Nov 1882 in Erlenbach bei Kandel, Pfalz, Bayern. Luisa (daughter of Heinrich Martz and Eva Elisabetha Wüst) was born on 18 Jul 1862 in Erlenbach bei Kandel, Pfalz, Bayern. [Group Sheet] [Family Chart]

1. Luisa Koch was born on 26 Sep 1883 in Kandel, Pfalz, Bayern; died on 22 Jan 1948 in Ludwigshafen am Rhein, Pfalz, Bayern.
2. Maria Elisabetha Koch was born on 20 Feb 1887 in Kandel, Pfalz, Bayern.
3. Julius Koch was born on 2 Oct 1889 in Erlenbach bei Kandel, Pfalz, Bayern; died on 12 May 1916 in Hulluch, Pas-de-Calais, Nord-Pas-de-Calais, France.
4. Heinrich Koch was born on 25 Jun 1895 in Erlenbach bei Kandel, Pfalz, Bayern; died on 5 Apr 1956 in Erlenbach bei Kandel, Landkreis Germersheim, Rheinland-Pfalz.