Propane Atlas

Propane in O'Fallon

16 propane locations in O'Fallon, MO.

Of the 16 propane locations listed in O'Fallon, 1 fills tanks by the gallon, 15 offer tank exchange, and 1 dispenses autogas for vehicles.

Nearby cities in Missouri with listed propane: Lake Saint Louis (3 locations, about 4 mi), Saint Peters (11 locations, about 6 mi) and St Peters (5 locations, about 7 mi).

16 locations

U-Haul

2000 Highway K, O'Fallon, MO

Refill · Autogas

Tank exchange in O'Fallon (15)

Stores listed by the exchange brands' own retailer locators as carrying swap cages for grill-size cylinders. A listing is not a stock check, so call ahead if you need a tank at a particular hour.

Conoco Gas Mart

8695 Veterans Memorial Pkwy, O'Fallon, MO 63366

Tank Exchange · Blue Rhino

Directions Call store

Listed in Blue Rhino's retailer locator, checked Sep 27, 2026.

Fresh Thyme Farmer's Market #403

2235 Hwy K, O'Fallon, MO 63368

Tank Exchange · Blue Rhino

Directions Call store

Listed in Blue Rhino's retailer locator, checked Sep 27, 2026.

Home Depot

1525 Hwy K, O'Fallon, MO 63366

Tank Exchange · AmeriGas

Listed by AmeriGas as a 24/7 self-serve exchange.

Directions About Home Depot exchange

Listed in AmeriGas's exchange locator, checked Sep 27, 2026.

Petro Mart #4217

914 Bryan Road, O'Fallon, MO 63366

Tank Exchange · Blue Rhino

Directions Call store

Listed in Blue Rhino's retailer locator, checked Sep 27, 2026.

Petro Mart #4218

2140 West Terra Lane, O'Fallon, MO 63366

Tank Exchange · Blue Rhino

Directions Call store

Listed in Blue Rhino's retailer locator, checked Sep 27, 2026.

Before you go

Refill vs. Tank Exchange: What You Actually Get

Exchange trades a tank; refill sells you gas by the gallon. The difference in what you get home with is larger than most people expect.

When Does a Propane Tank Expire?

Twelve years from the date stamped on the collar, then a requalification interval that depends on the test method. An out-of-date cylinder cannot legally be refilled.