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 19,537 people and seven associated neighborhoods, St. Marys is the 58th largest community in Georgia.

There are many members of the armed forces living in St. Marys. You will notice when you visit or live here that some of the people you meet or see around town are employed by the armed services - even if they are not always in uniform.

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.

A relatively large number of people in St. Marys telecommute to their jobs. Overall, about 11.95% of the workforce works from home. While this may seem like a small number, as a fraction of the total workforce it ranks among the highest in the country. 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.

The overall education level of St. Marys is somewhat higher than in the average US city of 21.84%: 27.16% of adults 25 and older in the city have at least a bachelor's degree.

The per capita income in St. Marys in 2022 was $34,958, 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 $139,832 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 Irish, German, English, Italian, and Scottish.

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