On 22 Sep 1773 when Peter was 28, he married Comfort Clark (48468) , daughter of David Clark (30997) (ca 1713-6 Mar 1800) & Hannah Peck (48140) (6 May 1716-), in Woodbridge, CT. Born on 3 Apr 1748 in Woodbridge, CT. Comfort died in New Haven, CT, on 25 Nov 1834; she was 86.

Children of Peter & Comfort (Clark) Johnson, born at New Haven, birth order uncertain:
    i. Peter Johnson, m. Esther Thomas (dau. of Edward & Esther Thomas);
    ii. Harvey Johnson;
    iii. Comfort Johnson, m. at New Haven 31 Aug 1800 Elisha Jones;
    iv. Martha Johnson, b. Jan 1781, m. 2 Feb 1800 John Kennedy;
    v. Chloe Johnson; and
    vi. Horace Johson.