St. Mary's, Colorado

Nearest ZIP codes to St. Mary's

This is the ZIP code nearest to St. Mary's, each listed with the post office it is named after.

Area codes for St. Mary's

• Area code 303

  In service since 1947. Shares its area with 720 and 983. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 720

  In service since June 1, 1998. Shares its area with 303 and 983. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 983

  In service since June 17, 2022. Shares its area with 303 and 720. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.

Time zone

St. Mary's is in the Mountain Time zone.

Towns near St. Mary's

• Downieville-Lawson-Dumont6.5 km (4.0 mi)
• Empire6.9 km (4.3 mi)
• Dumont7 km (4.3 mi)
• Idaho Springs9.5 km (5.9 mi)
• Central City11.5 km (7.1 mi)
• Central12 km (7.5 mi)
• Georgetown13 km (8.1 mi)
• Winter Park14.5 km (9.0 mi)