[1] The village, and its neighbour Trimley St. Martin, are famous for their adjacent churches, which were built as the result of a historical family feud.

[4] Recent archaeological findings in neighbouring Walton showed evidence of Bronze Age field systems in use.

The breakdown for the males was 57 in agriculture, 7 in general commodities, 7 in domestic services/offices, 6 in food and lodging and 5 working with animals.

[10] This parallels the general trend of change throughout the rest of England, where the agricultural industry has seen large declines, along with most industries of the primary sector of the economy as people have moved over to the secondary and tertiary sectors in hope of greater pay and better conditions in the workplace.

There is a variety of local businesses, including window cleaners, beauticians, photographers, metal works, recycling plants, dog groomers, garages,[13] and a care home.

The parish also contains Trimley St Mary Primary School, which in 2014 catered for 370 pupils and has been in existence since 1904, maintaining a good reputation.

[15] Environmental information from 2005 census data showed that over 75% of the parish was termed "greenspace"; including domestic gardens, this rises to 85%—still below the average for England.

[16] The 2011 census data showed that 3,493 of the 3,665 people living in Trimley St Mary were from the United Kingdom.

This is a lower number of residents from other countries than the general trend for the UK but is similar to the average for the Suffolk coast.

[19] The pub had an annual charity day on which local bands came and played, and a barbecue was supplied and a raffle held to raise money.

[22] The A14 is the nearest major road to Trimley St Mary, and runs between Felixstowe port and the Midlands.