What is the population of St. Marys city?

St. Marys city has 18,805 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #61 of 675 in Georgia.

What is the median household income in St. Marys city?

Median household income in St. Marys city is $67,271 a year, 14.3% below the national figure of $78,538.

How much does it cost to rent or buy in St. Marys city?

Median gross rent is $1,171 a month and the median home value is $259,300, so rent absorbs about 20.9% of median household income.

Is St. Marys city affordable compared with the rest of the US?

Homes cost about 3.9× the local median income here versus roughly 3.9× nationally, so St. Marys city is more affordable to buy in than the typical US market, and rent takes 20.9% of median income against the 30% cost-burden line.

Aerial view of a dense city center, illustrating the US cities ZIP code directory

Georgia · Census place 67984

St. Marys, GA population, income and ZIP codes

Quick answer

The population of the city of St. Marys, Georgia (St. Marys, GA — Census place “St. Marys city”) is 18,805 residents, ranking #61 of 675 places in Georgia. Median household income is $67,271, the median home is worth $259,300 and median gross rent runs $1,171 a month. Looking for the St. Marys Georgia ZIP code list? 1 ZIP codes serve St. Marys, GA: 31558.

Population: 18,805St. Marys city residents
Median household income: $67,271Past 12 months, inflation adjusted
Median home value: $259,300Owner-occupied units
Median gross rent: $1,171Rent plus utilities, monthly
Median age: 33.6 yrsAll residents
Homeownership rate: 55.2%Owner-occupied households

St. Marys ZIP codes (Georgia)

Census ZCTAs whose delivery area overlaps St. Marys.

The St. Marys GA ZIP code list below covers 1 ZIP code. Open any one for its population, income, housing and rent profile.

31558

What the numbers mean in St. Marys city

Housing cost measured against local earnings.

A household earning the St. Marys city median would spend about 20.9% of gross income on the median rent. The 30% mark is the federal threshold for cost burden, so anything above it signals a stretched rental market. The median home costs 3.9× the median household income; nationally that ratio sits near 4.5×. Poverty affects 20.4% of residents and 55.2% of households own their home.

Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year

St. Marys city, GA in context

How this area compares with national benchmarks.

St. Marys city is a mid-size town in Georgia, with 18,805 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #61 of 675 ranked by population — larger than 91% of them. The median age here is 33.6 years against 39.1 nationally, a slightly younger profile than the country as a whole. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.

Households in St. Marys city earn a median of $67,271 a year, 14.3% below the national figure of $78,538 and 17% above the $57,300 median for the 378 Georgia cities we cover. This figure covers the household, not the worker: two people on ordinary wages at one address outrank a single professional in the same table. Poverty reaches 20.4% of residents here, well above the 12.4% national rate, which is the single clearest signal in this dataset that median income here is carried by a narrow band of households.

The typical owner-occupied home in St. Marys city is valued at $259,300, 14.5% below the national figure and 35% above the $191,600 peer median, while median gross rent runs $1,171 a month, 16.7% below the national figure, or roughly $14,052 across a full year. A household on the local median income would put about 20.9% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is within the standard affordability guideline. The home-price-to-income ratio works out to 3.9×, against roughly 3.9× nationally, so buying is easier here than in the average US market. 55.2% of occupied homes are owner-occupied versus 65% nationally, so the market leans more heavily on renters. Rent is reported gross — contract rent plus tenant-paid utilities — which is why it runs above the advertised price on a listing for the same unit.

All values below were released by the Census for this exact geography, with no gap-filling on our side. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.

Compare with nearby places

Places of similar size in Georgia.

More Georgia coverage.

Frequently asked questions

Common questions about this area.

What is the population of St. Marys city?: St. Marys city has 18,805 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #61 of 675 in Georgia.
What is the median household income in St. Marys city?: Median household income in St. Marys city is $67,271 a year, 14.3% below the national figure of $78,538.
How much does it cost to rent or buy in St. Marys city?: Median gross rent is $1,171 a month and the median home value is $259,300, so rent absorbs about 20.9% of median household income.
Is St. Marys city affordable compared with the rest of the US?: Homes cost about 3.9× the local median income here versus roughly 3.9× nationally, so St. Marys city is more affordable to buy in than the typical US market, and rent takes 20.9% of median income against the 30% cost-burden line.
How current is this St. Marys city data?: All figures come from the US Census Bureau American Community Survey 2019-2023 ACS 5-year five-year estimates. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.