[3] The Battle of Moremonui was fought between the Ngāti Whātua and Ngāpuhi iwi about 6 km northwest of Baylys Beach in 1807 or 1808.

[8] Statistics New Zealand describes Baylys Beach as a rural settlement, which covers 0.56 km2 (0.22 sq mi)[1] and had an estimated population of 440 as of June 2024,[2] with a population density of 786 people per km2.

Baylys Beach is part of the larger Kaipara Coastal statistical area.

The results were 83.7% European (Pākehā); 22.5% Māori; 4.7% Pasifika; 5.4% Asian; 0.8% Middle Eastern, Latin American and African New Zealanders (MELAA); and 7.8% other, which includes people giving their ethnicity as "New Zealander".

Of those at least 15 years old, 51 (15.7%) people had a bachelor's or higher degree, 174 (53.7%) had a post-high school certificate or diploma, and 81 (25.0%) people exclusively held high school qualifications.