Oak Grove, Illinois

Nearest ZIP codes to Oak Grove

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

Area codes for Oak Grove

• Area code 309

  In service since 1957. Shares its area with 861. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 861

  In service since February 24, 2023. Shares its area with 309. 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

Oak Grove is in the Central Time zone.

Towns near Oak Grove

• Coyne Center1.6 km (1.0 mi)
• Milan1.6 km (1.0 mi)
• Coal Valley9.4 km (5.8 mi)
• Reynolds10.8 km (6.7 mi)
• Moline11.2 km (7.0 mi)
• Rock Island Arsenal12 km (7.5 mi)
• Rock Island12.3 km (7.6 mi)
• Andalusia12.3 km (7.6 mi)