Williamson, Illinois

Nearest ZIP codes to Williamson

These are the ZIP codes nearest to Williamson, each listed with the post office it is named after.

Area codes for Williamson

• Area code 618

  In service since 1947. Shares its area with 730. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 730

  In service since July 7, 2023. Shares its area with 618. 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

Williamson is in the Central Time zone.

Towns near Williamson

• Livingston1.8 km (1.1 mi)
• New Douglas2.8 km (1.7 mi)
• Staunton3.8 km (2.4 mi)
• Worden9 km (5.6 mi)
• White9.6 km (6.0 mi)
• Mount Olive9.7 km (6.0 mi)
• Alhambra11.5 km (7.1 mi)
• Sawyerville11.5 km (7.1 mi)