What is the population of Gaithersburg city?

Gaithersburg city has 69,225 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #9 of 536 in Maryland.

What is the median household income in Gaithersburg city?

Median household income in Gaithersburg city is $107,496 a year, 36.9% above the national figure of $78,538.

How much does it cost to rent or buy in Gaithersburg city?

Median gross rent is $2,008 a month and the median home value is $484,500, so rent absorbs about 22.4% of median household income.

Is Gaithersburg city affordable compared with the rest of the US?

Homes cost about 4.5× the local median income here versus roughly 3.9× nationally, so Gaithersburg city is less affordable to buy in than the typical US market, and rent takes 22.4% of median income against the 30% cost-burden line.

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

Maryland · Census place 31175

Gaithersburg, MD population, income and ZIP codes

Quick answer

The population of the city of Gaithersburg, Maryland (Gaithersburg, MD — Census place “Gaithersburg city”) is 69,225 residents, ranking #9 of 536 places in Maryland. Median household income is $107,496, the median home is worth $484,500 and median gross rent runs $2,008 a month. Looking for the Gaithersburg Maryland ZIP code list? 4 ZIP codes serve Gaithersburg, MD: 20877, 20878, 20879, 20899.

Population: 69,225Gaithersburg city residents
Median household income: $107,496Past 12 months, inflation adjusted
Median home value: $484,500Owner-occupied units
Median gross rent: $2,008Rent plus utilities, monthly
Median age: 37.8 yrsAll residents
Homeownership rate: 51.3%Owner-occupied households

Gaithersburg ZIP codes (Maryland)

Census ZCTAs whose delivery area overlaps Gaithersburg.

The Gaithersburg MD ZIP code list below covers 4 ZIP codes. Open any one for its population, income, housing and rent profile.

What the numbers mean in Gaithersburg city

Housing cost measured against local earnings.

A household earning the Gaithersburg city median would spend about 22.4% 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 4.5× the median household income; nationally that ratio sits near 4.5×. Poverty affects 8.8% of residents and 51.3% of households own their home.

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

Gaithersburg city, MD in context

How this area compares with national benchmarks.

Gaithersburg city is a small city in Maryland, with 69,225 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #9 of 536 ranked by population — larger than 98% of them. The median age here is 37.8 years against 39.1 nationally, a slightly younger profile than the country as a whole. At this size the Census also publishes one-year estimates; the five-year values used here are steadier and let you compare against smaller neighbours on the same basis.

Households in Gaithersburg city earn a median of $107,496 a year, 36.9% above the national figure of $78,538 and within a couple of points of the $109,026 median for the 332 Maryland cities we cover. The median is the midpoint household, not an average, so a handful of very high earners cannot drag it upward the way they distort a mean. Poverty reaches 8.8% of residents here, below the 12.4% national rate.

The typical owner-occupied home in Gaithersburg city is valued at $484,500, 59.7% above the national figure and 22% above the $397,200 peer median, while median gross rent runs $2,008 a month, 42.8% above the national figure, or roughly $24,096 across a full year. A household on the local median income would put about 22.4% 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 4.5×, against roughly 3.9× nationally, so buying is harder here than in the average US market. 51.3% 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.

No figure on this page is estimated by us; each one comes straight from the published ACS tables for this area. 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 Maryland.

More Maryland coverage.

Frequently asked questions

Common questions about this area.

What is the population of Gaithersburg city?: Gaithersburg city has 69,225 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #9 of 536 in Maryland.
What is the median household income in Gaithersburg city?: Median household income in Gaithersburg city is $107,496 a year, 36.9% above the national figure of $78,538.
How much does it cost to rent or buy in Gaithersburg city?: Median gross rent is $2,008 a month and the median home value is $484,500, so rent absorbs about 22.4% of median household income.
Is Gaithersburg city affordable compared with the rest of the US?: Homes cost about 4.5× the local median income here versus roughly 3.9× nationally, so Gaithersburg city is less affordable to buy in than the typical US market, and rent takes 22.4% of median income against the 30% cost-burden line.
How current is this Gaithersburg city data?: All figures come from the US Census Bureau American Community Survey 2019-2023 ACS 5-year five-year estimates. At this size the Census also publishes one-year estimates; the five-year values used here are steadier and let you compare against smaller neighbours on the same basis.