Quick Fact: The U.S. Capitol sits at 38.8899° N, 77.0091° W in Washington, D.C., with its famous white dome stretching 288 feet high and serving as Congress’s home since 1800.
Where does the U.S. Congress meet?
Right here in the U.S. Capitol building in Washington, D.C. That’s where both the Senate and the House of Representatives gather to do their legislative work.
Geographic Context: The Capitol anchors the eastern end of the National Mall, a two-mile green space in downtown D.C., chosen in 1791 by Washington and L’Enfant to symbolize open government.
Why is the Capitol located where it is?
George Washington and Pierre Charles L’Enfant picked this spot in 1791 to place the Capitol at the eastern end of the National Mall. They wanted a design that made government visible and accessible to everyday citizens.
What are the Capitol’s coordinates?
The Capitol sits at 38.8899° N, 77.0091° W in Washington, D.C.—you can plug those into any GPS and it’ll take you straight to the building.
How tall is the Capitol’s dome?
The iconic dome tops out at 288 feet. That’s taller than most city skyscrapers, and it’s been the Capitol’s most recognizable feature since 1866.
How big is the Capitol building?
The building itself covers about 16.5 acres, while the whole Capitol complex stretches across 274 acres. That’s roughly 208 football fields lined up side by side.
Key Details: The dome stands 288 feet tall (completed 1866), the building footprint covers 16.5 acres, the complex spans 274 acres, it’s 0.9 miles from the White House, and draws 3–4 million visitors yearly.
How far is the Capitol from the White House?
It’s less than a mile—about 0.9 miles (1.4 km) as the crow flies. That’s a brisk 15-minute walk if you’re feeling ambitious.
How many visitors does the Capitol get each year?
On average, the Capitol welcomes around 3–4 million visitors annually. That’s a lot of people walking through those hallowed halls.
How many members are in Congress?
The House has 435 voting members, while the Senate has 100. Together, they make up the full U.S. Congress that meets in the Capitol every year.
When does Congress hold its sessions?
Congress typically runs from early January through mid-December, with breaks timed around federal holidays and district work periods. That’s when the real legislative grind happens.
Interesting Background: The Capitol’s cornerstone was laid in 1793 by Washington, the original sandstone design came from Dr. William Thornton, and the iron dome (finished in 1866) nearly got scrapped during the Civil War.
Who laid the Capitol’s cornerstone?
President George Washington himself placed the cornerstone on September 18, 1793, using a ceremonial trowel that’s still kept in the Senate wing today.
Who designed the original Capitol building?
The first design came from Dr. William Thornton in 1793, but the building grew over time thanks to architects like Benjamin Latrobe and Charles Bulfinch.
When was the Capitol’s iron dome completed?
The current iron dome was finished in 1866, after years of construction that nearly stalled during the Civil War—yet it still stands as a symbol of national resilience.
Where did Congress meet before the Capitol?
Back in 1789, Congress first gathered in New York City’s Federal Hall, then moved to Philadelphia in 1790 before settling in Washington, D.C. in 1800.
Why did Congress move to Washington, D.C.?
The Residence Act of 1790 set the capital on the Potomac River as a compromise between Northern and Southern states. That’s why Congress ended up in D.C.
Practical Information: Public access is free but requires advance registration via the
official Capitol Visitor Center website, with tours covering the Crypt, Rotunda, and National Statuary Hall.
Can the public tour the U.S. Capitol?
Absolutely. Free public tours are available, but you’ll need to book in advance through the Capitol Visitor Center website. That’s the only way to get inside.
What’s inside the Capitol that visitors can see?
Most tours include the Crypt, Rotunda, and National Statuary Hall. You’ll find statues from every state, historic paintings, and the famous old House Chamber.
How do I get gallery passes to watch Congress in session?
You can pick up passes at House or Senate office buildings or request them through your local representative. They’re especially in demand during big debates or presidential speeches.
What are the Capitol’s public access hours?
As of 2026, the Capitol is open Monday through Saturday, with longer hours during peak tourist seasons. Check the website before you go—hours can shift.
What items are prohibited in the Capitol?
Backpacks larger than 17" x 12" x 8" aren’t allowed, and all visitors go through mandatory security screening. Leave the big bags at your hotel.
Are guided tours available at the Capitol?
Yes. The U.S. Capitol Police offer free guided tours if you ask, and the Capitol Grounds—including the east plaza—are patrolled by them too.
What Metro stations serve the Capitol?
The closest stops are Capitol South and Union Station, both reachable via the Blue, Orange, and Red lines. From there, it’s just a short walk to the building.
Is there a virtual tour of the Capitol?
The Architect of the Capitol offers a 360-degree virtual tour at aoc.gov/virtual-tours. It’s updated every year with fresh images and historical notes.
