ZIP code 63303
Where is ZIP code 63303?
Saint Charles, Missouri
St. Charles County · Standard ZIP code
ZIP code 63303 belongs to Saint Charles, Missouri in St. Charles County. 63303 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Central Time zone and uses area codes 314, 557 and 636. About 46,089 people live in the 63303 area, where the median household income is $99,138. The closest ZIP codes are 63301 (Saint Charles, 3.5 mi northeast), 63302 (Saint Charles, 3.9 mi northeast) and 63376 (Saint Peters, 4.3 mi west).
| ZIP code | 63303 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Saint Charles |
| Also accepted | Saint Peters |
| State | Missouri (MO) |
| County | St. Charles County |
| Time zone | Central Time · now |
| Area codes | 314, 557, 636 |
| Coordinates | 38.7622, -90.5471 map |
| 3-digit prefix | 633 |
Population and income in 63303
| Population | 46,089 · higher than 99% of Missouri ZIP codes |
|---|---|
| People per square mile | 2,333 · higher than 93% of Missouri ZIP codes |
| Median age | 41.4 years · lower than 51% of Missouri ZIP codes |
| Men / women | 50% / 50% |
| Median household income | $99,138 · higher than 92% of Missouri ZIP codes |
| Income per person | $58,928 |
| Below the poverty line | 5.3% |
| Bachelor’s degree or higher | 49% of adults 25+ |
| Median home value | $321,100 · higher than 91% of Missouri ZIP codes |
| Median rent | $1,374 a month |
| Housing units | 21,538 |
| Households | 20,690 (2.21 people on average) |
| Owners / renters | 74% / 26% |
| Land area | 19.75 sq mi (plus 1.49 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 63303. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 63303
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 63301 | Saint Charles, MO | 3.5 mi NE | Standard |
| 63302 | Saint Charles, MO | 3.9 mi NE | PO Box only |
| 63376 | Saint Peters, MO | 4.3 mi W | Standard |
| 63045 | Earth City, MO | 4.4 mi E | Standard |
| 63304 | Saint Charles, MO | 4.4 mi W | Standard |
| 63146 | Saint Louis, MO | 5.8 mi SE | Standard |
| 63338 | Cottleville, MO | 5.9 mi W | PO Box only |
| 63043 | Maryland Heights, MO | 6 mi SE | Standard |
| 63006 | Chesterfield, MO | 7 mi S | PO Box only |
| 63044 | Bridgeton, MO | 7.1 mi E | Standard |
| 63017 | Chesterfield, MO | 7.8 mi S | Standard |
| 63141 | Saint Louis, MO | 9 mi SE | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 63303 or measure the distance to another ZIP code.
How to address mail to 63303
123 MAIN ST
SAINT CHARLES MO 63303
Put the city, the two-letter state code and the ZIP code on the last line. USPS also accepts SAINT PETERS as the city name for 63303. Avoid Harvester and St Peters: USPS doesn’t recognize them as the city for this ZIP code. Adding the 4-digit ZIP+4 code (63303-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Saint Charles, MO
All Saint Charles ZIP codes with population and income →
Questions
- What city is ZIP code 63303?
- 63303 is a Saint Charles, Missouri ZIP code. Saint Peters is also accepted as the city name.
- What county is 63303 in?
- ZIP code 63303 is in St. Charles County, Missouri.
- What time zone is ZIP code 63303 in?
- 63303 is in the Central Time zone (America/Chicago).
- What area code is 63303?
- Phone numbers in ZIP code 63303 use area codes 314, 557 and 636.
- What is the population of ZIP code 63303?
- About 46,089 people live in ZIP code 63303, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 63303?
- The median household income in 63303 is $99,138 a year, higher than 92% of Missouri ZIP codes.
- What ZIP codes are near 63303?
- The nearest ZIP codes to 63303 are 63301 (Saint Charles, 3.5 miles), 63302 (Saint Charles, 3.9 miles), 63376 (Saint Peters, 4.3 miles) and 63045 (Earth City, 4.4 miles).