Post offices

Harvard Square Post Office

Open by scheduleMonday · 7:30 AM – 6 PM

Cambridge, MA

ⓘ Hours as published by the business

125 Mount Auburn Street, Cambridge, MA
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Opening hours

Monday · Today
7:30 AM – 6 PM
Tuesday
7:30 AM – 6 PM
Wednesday
7:30 AM – 6 PM
Thursday
7:30 AM – 6 PM
Friday
7:30 AM – 6 PM
Saturday
7:30 AM – 6 PM
Sunday

Holidays and short days are the usual exceptions — call before a long drive.

▤ Contact & details

⌖ Address
125 Mount Auburn Street, Cambridge, MA 02138
◇ Directions
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◆ Category
Post offices
◎ Country
US
⌂ Unit
1
◇ Operated by
United States Postal Service
⌘ Branch
Harvard Square

Record checked

About this location

A few stories people tell about this place

1. One morning, a delivery driver noticed something peculiar on the bulletin board inside Harvard Square Post Office. Written in bold marker were the words: ‘Free stamps for anyone who can prove they’re happy.’ The delivery driver grinned and thought, 'How hard could it be?' He approached an old lady with a big smile and asked, 'Ma’am, are you happy today?' She replied, 'Well, I guess so!' and took a stamp without hesitation. Word spread quickly around Cambridge, and soon everyone from students to professors lined up, proving their happiness just to get free stamps. Eventually, even the grumpiest neighbors started smiling when they saw each other, all thanks to that one silly sign.

2. At closing time one Friday, an exhausted postal worker locked up the Harvard Square Post Office and headed home. Walking past the mailboxes, he heard a voice whisper: ‘Don’t forget to check your letters tomorrow.’ The next morning, as he opened the doors, he found a note in his own mailbox: 'Checked yours today—nothing special.' He smiled, realizing it was just another prank from a regular who liked to keep things interesting.

3. At closing time one Thursday, an elderly neighbor walked into the Harvard Square Post Office and asked the clerk with a twinkle in his eye: ‘Do you know why they call it “square” here?’ The clerk smiled and shook her head, replying, 'No, sir, I never did.' The old man leaned closer and whispered conspiratorially, 'Because it's the only place where letters can cross paths without ever needing a stamp!' Everyone laughed, even the mailboxes seemed to smile that evening.

4. One day, a delivery driver entered the Harvard Square Post Office and asked curiously: ‘Who keeps leaving these mysterious packages here every week?’ A regular customer overheard him and joked, ‘Why don’t you ask that old lady who comes in every Wednesday? She always leaves strange packages.’ The driver looked puzzled but saw an elderly woman approaching with another oddly wrapped box under her arm. He smiled and said, ‘Guess I’ll find out!’

Source details

Business attributes

Address

City
Cambridge
Housenumber
125
Postcode
02138
State
MA
Street
Mount Auburn Street
Unit
1

Contacts

Hours & freshness

Check date
2026-06-07
Opening hours
Mo-Sa 07:30-18:00

Brand & operator

Operator
United States Postal Service
Short
USPS
Type
public
Wikidata
Q668687

What it offers

Amenity
post office

Other details

Branch
Harvard Square
Polling station
No
Post office
bureau

Source: OpenStreetMap, 19 recorded details for this place, last confirmed 2026-06-07.

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