PlainZIP

Great Mills, MD

Single-footprint Census roll-up for Great Mills, MD: 1 USPS ZIP, population 5,927. Open the primary ZIP for household income, housing tenure, and commute from ACS 2023 5-Year Estimates.

U.S. Census Bureau, SimpleMaps US ZIP Code Database, delivery-area ZIP coverage

ACS city ledger plate

Sheet GREAT-MILLS-MD · Great Mills, MD 1 ZIPs · 5,927 pop · #1186/25278 · St. Mary's County

INC-TOP · RANK-TOP · PHOTO-FINISH · BOOK-ONE · OWN-MID · POP-TOWN · SPREAD-UNK · HOME-MID

  • INC-TOP $139,375
  • RANK-TOP #1186/25278
  • PHOTO-FINISH ≈ Leonardtown
  • BOOK-ONE 1 ZIP
  • OWN-MID 65% owners
  • POP-TOWN 5,927
  • SPREAD-UNK Single-ZIP book
  • HOME-MID $342,300

Nearest income peer: Leonardtown, MD (+ $3,741 income $)

Instrument codes from this city’s ACS household income, national rank, county-peer gap, ZIP book, owner tenure, population scale, intra-city income spread, and home-value band, not a moving recommendation.

Income neighbourhood around Great Mills

Lowest/highest poles plus county-sharing cities nearest Great Mills on average ZIP median household income. Full ladder: /cities.

median HH income

What this shows County-sharing peers only, not the full US city board. Open a near peer when the gap is small; open the poles when the mosaic is wide.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2026-08-25

National city placement

According to ACS 5-Year Estimates, Great Mills, MD sits among US cities with a top-decile household income, on a town-scale population base, across a single-ZIP footprint.

Top 5%
household income vs 25,278 US cities
5,927
city population (Census)
1
USPS ZIP codes covered
$139,375
avg ZIP median income

Income percentile ranks this city's average ZIP median household income against 25,278 US cities with ACS income on at least one ZIP. Scale and ZIP-spread words come from Census population and USPS ZIP coverage.

High-income footprint on only 1 ZIP: the city page and the ZIP page nearly coincide. Headline income $139,375 and home value $342,300 should be read as near-neighborhood numbers ; bachelor's attainment averages 40.3%.

Owner-occupancy sits in a mixed band (65.4%) - check the ZIP page's tenure split before treating Great Mills as a pure owner town.

Within Maryland, Linthicum Heights is the closest lower-income city and Sykesville the closest higher-income city by average ZIP household income. Their 1 and 1 ZIP footprints are the immediate statewide comparison set for Great Mills.

Population concentration

One ZIP, 20634, is all of Great Mills

There is no split to weigh here: 20634 holds every one of Great Mills's 5,927 ACS residents. City-level and ZIP-level numbers on this site are the same number twice, check the ZIP page for the income/tenure/commute breakdown.

Census ZBP business roll-up

Sparse ZBP book inside single-ZIP Great Mills

Citywide ZBP: 48 establishments, 393 employees , annual payroll $19,737k (~8 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 20634 (48 units) ; leading NAICS Construction (11) · also Retail trade · Other services (except public administration) .

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ZIP Codes in Great Mills, MD

These ZIP codes sit in St. Mary's County, which covers 25 ZIP codes in all; 1 of them fall in Great Mills. See the St. Mary's County roll-up →

Great Mills lands mid-pack among the 9 cities sharing St. Mary's County: Leonardtown, Hollywood and Callaway earn more and Lexington Park, Mechanicsville and California earn less. Saint Inigoes marks the far end of that range at $180,060, 29% above Great Mills.

ZIP Code Population Median income Establishments Density
20634 5,927 $139,375 48 333
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Great Mills roll-ups here are for informational purposes only and do not constitute financial or relocation advice. ACS and Census ZBP figures are estimates; confirm the current table against Census before a money or move decision involving Great Mills, .