In 1493 the Bishop of Dromore (acting as a suffragan) was authorised to consecrate the churchyard for the inhabitants of Hook, Goole and Airmyn. An interesting feature in the churchyard is the small square stones marked with the letter 'C'. These marked the graves of the 197 people who died in the cholera epidemics of 1832 (76) and 1848 (121).
There is also the grave of Jacob Ludders 1844, a mariner born in Hamburg in 1786 whose work at sea brought him to this area.

Near the porch door there is the grave of Rev'd Chamberlain (Vicar 1912-1937) and a small grave by the south wall of Margaret Amy Paley, daughter of Rev'd Paley (Vicar from 1845).

Also in the churchyard are many mature trees including a beautiful copper beech and an equally fine Norway maple, both of which are reputed to be over 100 years old and are among the finest in the East Riding of Yorkshire.

The church notice board is the work of Robert Thompson's Craftsmen of Kilburn and features the Mouse Man's usual mouse trade mark.

In August each year the members of the congregation hold a picnic under the shade of the churchyard trees.

The churchyard is now maintained by the East Riding of Yorkshire Council and under their direction a number of dead and diseased trees were taken down. They also made safe many tombstones which were considered dangerous.