On 12 Apr 1733 when Benjamin was 25, he married Mary Moulton (22964) , daughter of David Moulton (8610) (ca 1678-14 Feb 1732/3) & Sarah Leavitt (8620) (ca 1683-), in Hampton, Rockingham County, New Hampshire. Born on 10 Jan 1711 in Hampton, Rockingham County, New Hampshire.40

Children of Benjamin and Mary (Moulton) Marston, born at Hampton:
    i. Sarah Marston, b. 23 Jun 1734;
    ii. Benjamin Hobbs Marston, bp. 11 Dec 1737;
    iii. Mary Marston, b. 13 Jun 1739;
    iv. Dorothy Marston, b. 7 May 1742;
    v. Jane Marston, b. 30 Sep 1745;
    vi. Abiah Marston, b. 30 Sep 1745; and
    vii. Abigail Marston, b. 7 Jun 1749.