Waltham
City in Middlesex County, Massachusetts

Waltham is a city in Middlesex County, Massachusetts, with 65,218 residents (2020 Census). It sits at 49 ft (15 m) above sea level. The nearest town is Belmont, 3.1 miles E.
- 65,218residents (2020 Census)
- 49 ftelevation · 15 m
- 12.7 sq miland area · 33.0 km²
- 5,117 / sq mipopulation density
- 02451main ZIP code (4 in total)
About Waltham
Waltham ( WAWL-tham) is a city in Middlesex County, Massachusetts, United States, and was an early center for the labor movement as well as a major contributor to the American Industrial Revolution. The original home of the Boston Manufacturing Company, the city was a prototype for 19th century industrial city planning, spawning what became known as the Waltham-Lowell system of labor and production. The city is now a center for research and higher education as home to Brandeis University and Bentley University. The population was 65,218 at the 2020 United States census. Waltham is part of the Greater Boston area and lies 9 miles (14 km) west of Downtown Boston.
Waltham has been called "Watch City" because of its association with the watch industry. Waltham Watch Company opened its factory in Waltham in 1854 and was the first company to make watches on an assembly line. It won the gold medal in 1876 at the Philadelphia Centennial Exposition. The company produced over 35 million watches, clocks, and instruments before it closed in 1957.
Waltham borders Watertown and Belmont to the east, Lexington to the north, Lincoln and Weston to the west, and Newton to the south.
Text: Wikipedia · CC BY-SA 4.0
Waltham weather: 7-day forecast
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Live webcams in Waltham
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Living in Waltham
- Median household income
- $120,216
- Median home value
- $748,700
- Median rent
- $2,268/mo
- Median age
- 34.4
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Map of Waltham
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Open in Google Maps ›Waltham, MA population
Waltham had 65,218 residents in the 2020 Census.
| 2020 Census | 65,218 |
|---|---|
| Density | 5,117 per sq mi (1,976 per km²) |
Source: U.S. Census Bureau, Decennial Census.
Waltham at a glance
| State | Massachusetts (MA) |
|---|---|
| County | Middlesex County |
| Type | City |
| Population | 65,218 (2020) |
| Land area | 12.74 sq mi (33.0 km²) |
| Water area | 1.02 sq mi (2.64 km²) |
| Elevation | 49 ft (15 m) |
| Coordinates | 42.3888° N, 71.2419° W |
| ZIP codes | 02451, 02452, 02453, 02465 |
| Official website | city.waltham.ma.us |
| Census code (GEOID) | 2572600 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near Waltham
- Belmont3.1 mi E
- Watertown3.5 mi E
- Weston3.7 mi SW
- Lexington3.9 mi N
- Newton4.3 mi SE
- Lincoln4.3 mi NW
- Arlington4.5 mi NE
- Hanscom AFB5.2 mi N
- Wellesley6.1 mi S
- Cambridge6.4 mi E
- Wayland6.4 mi W
- Winchester6.7 mi NE
Straight-line distance between town centers.
Frequently asked questions about Waltham
What county is Waltham in?
Waltham is in Middlesex County, Massachusetts.
What is the population of Waltham, MA?
65,218 people lived in Waltham at the 2020 Census.
What is the ZIP code of Waltham, MA?
The main ZIP code is 02451. Other ZIP codes: 02452, 02453, 02465.
What is the elevation of Waltham?
49 feet (15 m) above sea level.
What towns are near Waltham?
Belmont (3.1 mi), Watertown (3.5 mi), Weston (3.7 mi), Lexington (3.9 mi), Newton (4.3 mi).
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