He was married to Naomi Mollohan (daughter of George Dodrill Mollohan and Dianna Bickel) on 1 Jan 1856 in Braxton Co., WV.  Naomi Mollohan was born on 9 Nov 1838 in Webster Co., WV.  She appeared on the census in 1850 in Braxton Co., WV.  She appeared on the census in 1870 in Fork Lick District, Webster Co., WV.  She appeared on the census in 1880 in Fork Lick District, Webster Co., WV.  She died on 23 Oct 1917.  Benjamin "Kelly Ben" Hamrick and Naomi Mollohan had the following children:
 

• Mariah Naomi Hamrick.
• Arnold Mollohan Hamrick
• Isaac P. Hamrick.
• Adam Jasper Hamrick.
• Dianah Hamrick.
• William Grant Hamrick.
• Eli C. "Rimfire" Hamrick.
• Elijah Hamrick
• Elizabeth Jane Hamrick.
• Rebecca Ann Hamrick.
• Perry Simpson Hamrick.
• Felix Duffy Hamrick.
• Mary M. Hamrick
• Ellis R. Hamrick.
• George F. Hamrick.