County ZIP codes · Missouri · FIPS 29186

Ste. Genevieve County, MO ZIP Codes

Ste. Genevieve County, Missouri has 8 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 3 of the residential ones lie mainly in Ste. Genevieve County and 5 mainly in a neighboring county; 7 cross the county line. Median household income ranges from $54,747 in 63645 (Fredericktown) to $79,737 in 63028 (Festus) (Census Bureau, ACS 2020-2024).

ACS2020-24
Census2020

Where are the ZIP codes of Ste. Genevieve County?

The residential ZIP codes of Ste. Genevieve County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

63645 · $55k 63028 · $80k

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $61,913 and $63,602.

They carry 8 postal town names: Farmington, Festus, Bonne Terre, Sainte Genevieve, Fredericktown, Bloomsdale, Saint Mary, French Village.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 8 residential ZIP codes in Ste. Genevieve County

3 ZIP codes lie mainly in Ste. Genevieve County; 5 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Ste. Genevieve County, largest first; "In this county" is the share of the ZIP's land in the county
						In this county
63670	Sainte Genevieve	12,293	49	$63k	$213k	100%
63627	Bloomsdale	2,787	38	$88k	$267k	94%
63673	Saint Mary	2,340	20	$78k	$236k	49%

Partly in Ste. Genevieve County

Residential ZIP codes mainly in another county that reach at least 1% into Ste. Genevieve County, by their share here
						In this county
63640	Farmington	29,263	140	$62k	$217k	34%
63036	French Village	1,001	41	$58k	$200k	25%
63028	Festus	28,457	226	$80k	$240k	16%
63628	Bonne Terre	16,416	137	$64k	$189k	8%
63645	Fredericktown	11,554	32	$55k	$158k	4%

Download the 8 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

7 ZIP codes of Ste. Genevieve County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Ste. Genevieve County and in the neighboring counties
ZIP	In Ste. Genevieve	Elsewhere
63640	34%	St. Francois County 66%
63028	16%	Jefferson County 83%
63628	8%	St. Francois County 84%; Washington County 6%; Jefferson County 2%
63645	4%	Madison County 87%; St. Francois County 8%
63627	94%	Jefferson County 6%
63673	49%	Perry County 30%; Randolph County 20%
63036	25%	St. Francois County 75%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Ste. Genevieve County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Ste. Genevieve County's ZIP codes use 2 prefixes: 630 and 636.

Three-digit prefixes of Ste. Genevieve County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Ste. Genevieve County's
Prefix	Sectional center	Here	All codes
630	St Louis, MO (SCF 630)	2	65
636	St Louis, MO (SCF 630)	6	37

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.