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Montgomery County post offices have a toll free number, 800-275-8777. Dial the number and choose from one of the following six options:
Rates and mailing information;
ZIP codes;
Change of address or to hold mail;
Delivery of mail to business or residence;
Retail services — Mail a letter or package,
purchase stamps;
Other postal information: www.usps.gov.

Ashton Post Office
19 Olney Sandy Spring Road
Ashton, MD 20861
301-570-8253

Aspen Hill Retail Unit
13529 Connecticut Ave.
Silver Spring, MD 20906
301-598-5033

Barnesville Post Office
22110 Beallsville Road
Barnesville, MD 20838
301-972-8153

Beallsville Post Office
19800 Darnestown Road
Beallsville, MD 20839
301-349-2140

Bethesda Post Office
7400 Wisconsin Ave.
Bethesda, MD 20814
301-941-2665

Bethesda-Chevy Chase Post Office
7001 Arlington Road
Bethesda, MD 20814
301-941-2682

Boyds Main Office
15300 Barnesville Road
Boyds, MD 20841
301-972-9527

Brookeville Main Office
22311 Georgia Ave.
Brookeville, MD 20833
301-260-2975

Burtonsville Main Office
15624 Columbia Pike
Burtonsville, MD 20866
301-476-9371

Cabin John Main Office
7945 MacArthur Blvd.,
Suite 101
Cabin John, MD 20818
301-320-4103

Chevy Chase Branch
5910 Connecticut Ave.
Chevy Chase, MD 20815
301-941-2681

Clarksburg Main Office
22505 Gateway Center Drive,
Clarksburg, MD 20871
301-540-0856

Colesville Branch
13217 New Hampshire Ave.
Silver Spring, MD 20904
301-879-2331

Damascus Main Office
26400 Woodfield Road
Damascus, MD 20872
301-253-3781

Derwood Station
17533 Redland Road
Derwood, MD 20855
301-527-1103

Diamond Farms Branch
23 Firstfield Road
Gaithersburg, MD 20878
301-208-3735

Dickerson Main Office
22145 Dickerson Road
Dickerson, MD 20842
301-428-8243

Forest Glen Post Office
2460 Linden Lane,
Unit 161
Silver Spring, MD 20910
301-295-7594

Friendship Heights Station
5530 Wisconsin Ave.
Chevy Chase, MD 20815
301-941-2695

Gaithersburg Station
21 S. Summit Ave.
Gaithersburg, MD 20877
301-208-3701

Garrett Park Main Office
4600 Waverly Ave.
Garrett Park, MD 20896
301-933-2580

Germantown Main Office
12774 Wisteria Drive
Germantown, MD 20874
301-428-0460

Glen Echo Main Office
6106 Harvard Ave.
Glen Echo, MD 20812
301-229-3025

Kensington Main Office
10325 Kensington Parkway
Kensington, MD 20895
301-949-2863

Kentlands Post Office
618 Center Point Way
Gaithersburg, MD 20878
301-869-4866

Laytonsville Branch
6830 Olney-Laytonsville Road
Gaithersburg, MD 20882
301-208-3736

Leisure World
Finance Center
3802 International Drive
Silver Spring, MD 20906
301-438-1009

Montgomery Village Station
10079 Stedwick Road
Montgomery Village, MD 20886
301-208-3716

National Naval
Medical Center Station
8901 Rockville Pike
Bethesda, MD 20889
301-941-2786

Olney Main Office
3570 Olney-Laytonsville Road
Olney, MD 20832
301-260-9013

Pike Station
143 Rollins Ave.
Rockville, MD 20852
301-231-5974

Poolesville Post Office
19820 Fisher Ave.
Poolesville, MD 20837
301-605-0544

Potomac Branch
10221 River Road
Potomac, MD 20854
301-983-4682

Rockville Main Office
500 N. Washington St.
Rockville, MD 20850
301-762-5802

Sandy Spring
Main Office
901 Olney-Sandy Spring Road
Sandy Spring, MD 20860
301-929-9135

Silver Spring
Main Office
8616 Second Ave.
Silver Spring, MD 20910
301-608-1302

Silver Spring
Finance Center
8455 Colesville Road
Silver Spring, MD 20910
301-608-1305

Suburban Maryland P&DC
16501 Shady Grove Road
Gaithersburg, MD 20898
301-670-6000

Takoma Park
Post Office
6909 Laurel Ave.
Takoma Park, MD 20912
301-270-4392

Twinbrook Station
2001 Veirs Mill Road
Rockville, MD 20851
301-762-8536

Washington Grove
111 Washington Grove Lane
Washington Grove, MD 20880
301-948-5009

West Bethesda
Post Office
10421 Motor City Drive
Bethesda, MD 20817
301-767-1742

Wheaton Branch
11431 Amherst Ave.
Silver Spring, MD 20902
301-929-7831

White Flint Mall Station
11301 Rockville Pike
Kensington, MD 20895
301-230-1276

Woodmoor Station
110 University Blvd. West
Silver Spring, MD 20901
301-754-1705