Living in Arnold, MO

Jefferson County

Arnold is a genuinely distinct south St. Louis-metro suburb in Jefferson County, sitting at the real confluence of the Meramec and Mississippi Rivers. Arnold's most distinctive story is a real, honest hazard-mitigation success: a catastrophic 1993 flood damaged more than 225 properties ($1.6 million in damage), and the city's response -- a voluntary federal buyout program (1994-2005, 67% federally funded) purchasing approximately 500 flood-prone residences -- converted former floodplain into real, current greenspace, athletic fields, and walking trails. The program's real, measurable success: the 2008 flood caused just $12,000 in damage, versus $1.6 million in 1993. Arnold's average home value ran approximately $279,059 this pass (Zillow, ZIP 63010, up 3.6% year-over-year), running close to Missouri's own $268,423 statewide average. Jefferson County's own property tax picture runs genuinely distinct from the St. Louis County suburbs built elsewhere in this project's Missouri batch: the one rate-based source found this pass (0.79%) runs modestly below Missouri's statewide average, though this record discloses real, lower confidence in this specific figure. Arnold's combined sales tax rate, by contrast, ran a real, disclosed 11.6% -- substantially above Missouri's statewide average, driven partly by the Arnold Retail Corridor Transportation Development District funding the city's substantial big-box retail corridor. Schools run through Fox C-6, Jefferson County's largest district, which carries a real, disclosed, genuinely mixed performance picture (a B- average grade, under its own projected proficiency benchmark). Arnold's crime rate carries a real, disclosed cross-source disagreement -- one source places it above the national average and most Missouri communities, another places it below -- alongside a real, favorable, disclosed 17% year-over-year decline in 2024. Arnold's median age (39.7) and senior share (18.5%-19.5%) run essentially at the national average, which is why this record uses TIER_B_TOPICS_NO_RETIREMENT (best-areas rather than retiring).

Explore Arnold in depth

• Moving to Arnold: Pros, Cons & What to Know
• Cost of Living in Arnold
• Housing in Arnold
• Taxes & Insurance in Arnold
• Climate in Arnold
• Schools & Families in Arnold
• Healthcare & Safety in Arnold
• Pros and Cons of Living in Arnold
• Best Areas to Live in Arnold

Housing

Taxes

The tradeoffs

Who this fits

Best for: Best fits families and buyers drawn to Arnold's real, distinctive river-adjacent parks and greenway trails (the direct legacy of its flood-buyout program), value-oriented buyers seeking housing priced close to Missouri's own statewide average, and anyone with a specific tie to Arnold's real local manufacturing (LMC Industries) or retail-corridor commercial base.

Maybe not for you if: Probably not the right fit for buyers seeking a firm, single-source-confirmed low crime rate or property tax rate, given the real, disclosed cross-source uncertainty on both this pass; anyone specifically avoiding higher sales tax rates, given Arnold's real, disclosed 11.6% combined rate; or buyers considering a specific address near the Meramec River without confirming current, address-specific FEMA flood-zone status directly.