Byrnes Mill
A city in Jefferson County, Missouri — population 3,015 as of 2020.
Scopes news, events and the map to Byrnes Mill. No account needed — we keep it on this device.
Your city
Change city
News, events and the map open here. Kept on this device.
is your city now — Byrnes Mill would replace it. We'll ask first.
stops being your city.
Byrnes Mill takes over news, events and the map.
Heat Advisory — Heat Advisory issued September 17 at 2:19AM CDT until September 19 at 8:00PM CDT by NWS St Louis MO
Overnight
73°F
Mostly Clear1% precip
Thursday
97°F
Sunny9% precip
Thursday Night
72°F
Mostly Clear10% precip
Friday
96°F
Sunny then Slight Chance Showers And Thunderstorms18% precip
In and around Byrnes Mill
See & do
+1 more on the mapEat, drink & stay
+1 more on the mapShops & services
+9 more on the mapMusicians & bands near Byrnes Mill →
Explore the Greater St. Louis metro →
Byrnes Mill changes faster than we can keep up.
Something opened, closed or moved? Tell us and we'll put it right. Our editors review submissions before they publish — you'll need an account with access to send one.
Byrnes Mill by the numbers
Population
3,015Population figure, 2020
Households & income
- Area
- 5.14 sq mi (13.32 km²), 0.12 sq mi water
- Median age
- 37.9
- Households
- 1,200
- Persons per household
- 2.7
Municipal office
- Office
- CITY ADMINISTRATOR
- Address
- 141 OSAGE EXECUTIVE CIR, BYRNES MILL, MO 63051