The hamlet of Boothby lies within the parish, about 1 mile (1.6 km) east of Welton le Marsh village.

[9][10] Thwaite Hall is a Grade II listed building, reputedly part of a former Augustinian Priory, with attached cottage; the present house dates from the 14th century.

[11] The Lincs to the Past website describes it as the site of an Augustinian Cell belonging to Thornton Abbey which was recorded in 1440 and which still existed in 1536.

[13] In June 1893, two Welton-le-Marsh residents with the names Johnson and Kime were violently killed after wandering onto part of the East Lincolnshire Railway between Willoughby and Alford.

Having not noticed the oncoming train, Johnson was decapitated, his head resting nearly a hundred yards from the body, and Kime was severely mutilated.