Lake Ronkonkoma Post Office

300 Portion Rd, Ronkonkoma, NY 11779

Contact Numbers

Phone: 631-588-1292
Fax: 631-471-1290
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours







Lobby Hours
PO Box Access Available

Monday 7:00am - 5:00pm
Tuesday 7:00am - 5:00pm
Wednesday 7:00am - 5:00pm
Thursday 7:00am - 5:00pm
Friday 7:00am - 5:00pm
Saturday 7:00am - 12:30pm
Sunday Closed

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 1:00pm
Sunday Closed

*This facility does not process US Passports applications or renewals. Check nearby locations below.

  • Burial Flags
  • Duck Stamps
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Street Parking

Visit our Links Page for Holiday Schedule, Change of Address, Hold Mail/Stop Delivery, PO Box rentals and fees, and Available Jobs.

*Please call to verify information. Is anything incorrect? Let us know here

Nearby Post Offices:

Ronkonkoma
200 Hawkins Ave
0.6 mile away

Lake Grove
1001 Hawkins Ave
1.2 miles away

Holbrook
445 Furrows Rd
1.4 miles away

Centereach
245 Centereach Mall
1.5 miles away

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