Riverside Post Office

4900 NW Gateway Ave, Riverside, MO 64150

Contact Numbers

Phone: 816-584-9912
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 24 hours
Tuesday 24 hours
Wednesday 24 hours
Thursday 24 hours
Friday 24 hours
Saturday 24 hours
Sunday 24 hours

Last Collection Times

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

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

  • Business Line
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Packaged Stamps
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Sure Money
  • Lot 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:

7170 N Broadway St
2.0 miles away

North Kansas City
820 Armour Rd
2.4 miles away

Barry Woods Annex
8320 N Platte Purchase Dr
2.5 miles away

Civic Center
550 Nebraska Ave
2.6 miles away


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Extremely rude customer service! I had mailed my wedding invitations out through this location over 3 weeks ago, and they have not been received by my participants. She was very confrontational on the phone, and offered no solution except to make another phone call to someone outside of the location. Will never drop off any packages or letters to be mailed off at this location. Too many things don't arrive to where they should go. Just end up being "lost". This is not the first incident of my letters not getting where they need to go. Very dissatisfied with their customer service.


It is with sadness that I have to claim that the postal service on Houston Lake has been the worst since I lived here since 1983. When Sarah Jones retired and then Jeffrey, I've had no delivers only to get two days worth of mail. I've had 8:15PM deliveries. This has been happening for the past few weeks and frankly I don't understand why mail delivery is not being done. How about the carrier's creed,. Someone from top management down has forgotten it. We're going to pay more for stamps in 2019, forget that I'll go on line. You're hurting yourselves. I see mail trucks wiz by but don't stop during the week day. Terrible service.


Horrible service! Middle aged black woman working the counter refused to scan my prepaid packages and provide me with a receipt. Any other PO in this city does this with no issues. As someone who uses the PO everyday of the week to send out packages for business will avoid Riverside, Missouri in the future.

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