Benjamin Bearse Sr. was born on 21 Jun 1682 in Barnstable, Barnstable Co., Massachusetts. He was baptized on 16 Dec 1688. He signed a will on 26 Mar 1748. He died on 15 May 1748 in Hyannis, Barnstable Co., Massachusetts. He was a fisherman. He was married to Sarah Cobb on 4 Feb 1701/2 in Barnstable, Barnstable Co., Massachusetts.

Sarah Cobb was born on 20 Aug 1681 in Barnstable, Barnstable Co., Massachusetts. She died on 14 Jan 1742 in Hyannis, Barnstable Co., Massachusetts. Children were:

i. Martha Bearse was born on 9 Nov 1702 in Hyannis, Barnstable Co., Massachusetts. She died in 1773 in Yarmouth, Barnstable Co., Massachusetts.
ii. Augustine Bearse was born on 3 Jun 1704 in Hyannis, Barnstable Co., Massachusetts. He died on 2 Jun 1751 in Barnstable, Barnstable Co., Massachusetts. He was a whaler.
iii. Elizabeth Bearse was born on 3 May 1707 in Hyannis, Barnstable Co., Massachusetts and died soon after.
iv. Joseph Bearse was born on 30 Oct 1708 in Hyannis, Barnstable Co., Massachusetts. He died on 15 May 1751 in Hyannis, Barnstable Co., Massachusetts.
v. Benjamin Bearse Jr..
vi. Jesse Bearse was born on 22 Oct 1712 in Hyannis, Barnstable Co., Massachusetts. He died about 1715 in Hyannis, Barnstable Co., Massachusetts.
vii. Priscilla Bearse was born on 5 Jun 1713 in Hyannis, Barnstable Co., Massachusetts. She died on 17 Oct 1759 in West Dennis, Barnstable Co., Massachusetts.
viii. Stephen Bearse was born about 1714 in Hyannis, Barnstable Co., Massachusetts.
ix. David Bearse was born on 27 Mar 1716 in Hyannis, Barnstable Co., Massachusetts. He died on 27 Mar 1716 in Hyannis, Barnstable Co., Massachusetts.
x. Peter Bearse was born on 25 Oct 1718 in Hyannis, Barnstable Co., Massachusetts. He died about 1790 in Hyannis, Barnstable Co., Massachusetts.
xi. Samuel Bearse was born on 9 Dec 1720 in Hyannis, Barnstable Co., Massachusetts. He died on 30 Oct 1751 in Yarmouth, Barnstable Co., Massachusetts.
xii. Sarah Bearse was born on 5 Jul 1722 in Hyannis, Barnstable Co., Massachusetts. She died on 1 Dec 1787 in South Dennis, Barnstable Co., Massachusetts.
xiii. Thankful Bearse was born on 4 Feb 1724 in Hyannis, Barnstable Co., Massachusetts. She died in Yarmouth, Barnstable Co., Massachusetts.

Benjamin Bearse Sr. married second Anna Nickerson in 1747.