Details of John's birth are not known.

John married Mary Lavender on Thursday 20 December 1770 in St Thomas' Church, Dudley, Worcestershire.

He had the following children from his marriage to Mary Lavender:

- Joseph Pinnock	born around 1771.
- Thomas Pinnock	born around 1773.
- Jenny Pinnock	born around 1774.
- John Pinnock	born around 1775.
- John Pinnock	born around 1776.
- Elizabeth Pinnock	born around 1777.
- William Pinnock	born around 1778.
- Mary Pinnock	born around 1779.
- Samuel Pinnock	born around 1781.
- Jane Pinnock	born around 1783.
- Mary Pinnock	born around 1788.
- Hannah Pinnock	born around 1791.

Details of John's occupation are not known.