The Pattullo Bridge is a through arch bridge that crosses the Fraser River and links the cities of New Westminster and Surrey in Metro Vancouver, British Columbia. It was named in honour of Thomas Dufferin Pattullo, the 22nd Premier of British Columbia. A key link between Surrey and the rest of Greater Vancouver, the Pattullo Bridge handles an average of 75,700 cars and 3840 trucks daily, or roughly 20% of vehicle traffic across the Fraser River as of 2013. A replacement bridge began construction in 2021 and is scheduled to be completed in late 2025.

The Pattullo Bridge is 1,227 meters (4,026 ft) in total length, and consists of four lanes, with two in each direction. The bridge has a line of plastic pillars for its central median, installed by TransLink to raise the visibility of the centre-lane divider. However, the lack of a concrete median barrier makes the causeway highly prone to head-on collisions, especially at excessive speed or in bad weather. The narrow traffic lanes and lack of a reliable centre divider have led to lane closures from 10:00 p.m. to 5:00 a.m. for safety.

In response to the high number of crashes on the bridge, TransLink studied the idea of reducing the number of lanes on the bridge from four to three using a counterflow operation, similar to that used on the Lions' Gate Bridge, with the number of lanes varied depending on traffic flow and volume. However, traffic analysis showed that significant congestion would result in Surrey and New Westminster, and the idea was abandoned. TransLink also examined a number of options to install a centre-line barrier and, in concert, to ban truck traffic from the bridge because the barrier would further narrow the traffic lanes, but that too was proven impractical. A more controversial proposal is to install photo radar on the bridge to enforce the existing speed limit. Thus far, the provincial government has ruled out the idea of bringing back photo radar, which it eliminated province-wide in 2001.

Oversized commercial vehicles are prohibited from using the bridge, as mandated by the British Columbia Commercial Vehicle Safety and Enforcement agency.

The first regular crossing of the Fraser River started in 1882, and was operated by a steam ferry named K de K, which transported residents and livestock from Brownsville to New Westminster. During the late 1890s, the need for a new bridge became apparent after the existing ferry was deemed insufficient to handle future traffic demands. The first bridge, a combined steel two deck road and rail span, started construction in 1902, with completion in 1904. The bridge was built with two decks, the upper deck handling vehicular traffic and the lower deck functioning as a railway bridge.

Again, growing traffic demands prompted the construction of a second bridge in 1936. The bridge was designed by supervising engineer Major W.G. Swan, and construction was tendered to the Dominion Bridge Company and Northern Construction & J.W. Stewart Ltd. The Pattullo Bridge was opened to traffic on November 15, 1937, by Premier "Duff" Pattullo, with a total cost of $4 million. The bridge was originally tolled at 25¢ per crossing, but was then removed in 1952. The old bridge, now known as the New Westminster Rail Bridge was converted to rail use only, and highway traffic was moved to the Pattullo Bridge.

Around 3 a.m. on January 18, 2009, a fire started on the south end of the bridge in the structure under the bridge deck. The 60-foot (18 m)-long wooden trestle on the south side of the bridge connecting the steel and concrete structure to the earthen berm sustained damage, and had to be completely rebuilt. Initially, it was estimated that the bridge would be closed for 4–6 weeks. However, by reusing a temporary bridge structure used on the Canada Line project, the bridge was reopened on Monday, January 26.

On July 31, 2008, TransLink opted to replace the bridge, rather than try to refurbish the aging structure. In June 2014, the Metro Vancouver Mayors' Council determined that the existing structure will be demolished and replaced with a new, 4-lane, tolled replacement bridge. Construction was expected to take place between 2019 and 2023, with the $1.3 billion funding finalized in 2018.

During 2016, rehabilitation work was completed on the bridge deck to keep the bridge operational until the replacement is built. From May 2 to August 26, the bridge was reduced to one lane of traffic in each direction, with full bridge closures on selected days. The bridge reopened one month ahead of schedule, on August 29.

On January 3, 2020, the government of British Columbia contracted Fraser Crossing Partners–a joint partnership between Acciona Infrastructure Canada and Aecon Group–to design and construct the replacement bridge. The contract also includes the construction of new road connections at the bridgeheads in New Westminster and Surrey. The new bridge will include pedestrian access and allow for future widening from 4 lanes to 6 lanes.

In February 2021, contractors began installing piles that will form the foundation of the bridge tower. However, this work was temporarily suspended to protect fish and habitat. On April 1, 2021, construction began on the replacement bridge with an expected opening date in 2024. It is now scheduled for late 2025.

• List of crossings of the Fraser River
• List of bridges in Canada