St. Marys is a medium-sized coastal city (i.e. on the ocean, a bay, or inlet) located in the state of Georgia. With a population of 18,980 people and seven associated neighborhoods, St. Marys is the 58th largest community in Georgia.

There are quite a few people in the armed forces living in St. Marys, and when you visit or drive around town, you will see military people in and out of uniform, shopping, enjoying life, and being part of the community.

Also of interest is that St. Marys has more people living here who work in computers and math than 95% of the places in the US.

Telecommuters are a relatively large percentage of the workforce: 9.33% of people work from home. While this number may seem small overall, as a fraction of the total workforce it is high relative to the nation. These workers are often telecommuters who work in knowledge-based, white-collar professions. For example, Silicon Valley has large numbers of people who telecommute. Other at-home workers may be self-employed people who operate small businesses out of their homes.

St. Marys is also nautical, which means that parts of it are somewhat historic and touch the ocean or tidal bodies of water, such as inlets and bays. Quite often, nautical areas such as these attract visitors and locals who come to enjoy the scenery and various waterfront activities.

Being a small city, St. Marys does not have a public transit system used by locals to get to and from work.

The education level of St. Marys citizens is a little higher than the average for US cities and towns: 24.75% of adults in St. Marys have at least a bachelor's degree.

The per capita income in St. Marys in 2022 was $34,577, which is upper middle income relative to Georgia, and middle income relative to the rest of the US. This equates to an annual income of $138,308 for a family of four. However, St. Marys contains both very wealthy and poor people as well.

St. Marys is a very ethnically-diverse city. The people who call St. Marys home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of St. Marys residents report their race to be White, followed by Black or African-American. Important ancestries of people in St. Marys include German, Irish, English, Italian, and Scottish.

The most common language spoken in St. Marys is English. Other important languages spoken here include Spanish and Polish.