Saint Louis, MO

ZIP code 63113 is assigned to Saint Louis, MO, and falls within St. Louis (city) County. Like every US postal code, it began as a mail-routing device rather than a geographic boundary — the US Postal Service groups delivery routes under a single code so carriers and sorting equipment can process mail efficiently. Today it also serves as a practical shorthand for the area itself: roughly 11,610 people live inside it.

At 4,500 residents per square mile spread over 2.58 square miles, 63113 reads as a densely built-up area. It is a mid-sized postal code by population, and density shapes almost everything else on this page — how people get to work, whether they own or rent, and what housing costs.

Household earnings are well below the national median. At $38,647, 63113 ranks among the lower-income postal codes, ahead of 5% of them. The US median for comparison is $70,109. Bear in mind that median income describes the midpoint household, not the average — it is not pulled upward by a handful of very high earners the way a mean would be.

Housing in 63113 costs well below the national median. A typical home is valued at $75,600 against a US median of $207,500, and median gross rent runs $914 a month. The split between owning and renting is fairly even at 49.2% owner-occupied, which tends to indicate a mix of housing types rather than one dominant form.

The building stock is dominated by detached single-family houses, which account for 58.1% of housing units here. The median construction year is 1938, making the housing here largely pre-war. The vacancy rate of 29.9% is high, which in many places reflects seasonal or second-home use rather than abandonment.

The population skews older than the national median, with a median age of 47.1 against 42 nationally. The average household holds 2.24 people, and 57.7% are family households.

Getting to work takes 24.5 minutes on average one way. The dominant mode is drove alone at 64.3% of workers, while 10.9% work from home. Commute patterns are one of the better proxies for how a place actually functions day to day.

Beyond addressing mail, 63113 does a lot of quiet administrative work. Retailers use it to calculate shipping and sales tax at checkout. Insurers use it to set premiums, since risk profiles vary geographically. Employers and marketers use it to define service areas. Government agencies use it to route benefits and organise reporting. If you have ever been asked for a postal code by a form that clearly does not intend to send you anything, this is why.

For anyone weighing a move, 63113 offers a compact profile of Saint Louis: 11,610 residents, a median household income of $38,647, 16.9% of adults holding a bachelor's degree or higher, and an unemployment rate of 11.0%. A handful of figures like these answer more relocation questions than most neighbourhood guides do.

One caution worth repeating: a postal code is not a neighbourhood. 63113 may cover parts of several distinct areas, and a single neighbourhood in Saint Louis may be split across more than one code. Boundaries also shift as USPS adjusts delivery routes. Treat the figures here as describing a delivery area, which is what they actually measure.