The Fraser Valley Regional District (FVRD) is a regional district in British Columbia, Canada. Its headquarters are in the city of Chilliwack. The FVRD covers an area of 13,361.74 km² (5,159 sq mi). It was created in 1995 by an amalgamation of the Fraser-Cheam Regional District and Central Fraser Valley Regional District and the portion of the Dewdney-Alouette Regional District from and including the District of Mission eastwards.

The FVRD is the third most populous Regional District in British Columbia, incorporating roughly the eastern half of the Lower Mainland of southwestern BC, and is bordered by Whatcom County, Washington to the south, Metro Vancouver to the west, the Okanagan-Similkameen Regional District to the east, the Squamish-Lillooet Regional District to the northwest, and the Thompson-Nicola Regional District to the northeast.

It also includes unincorporated areas north of the City of Pitt Meadows, which were part of the Dewdney-Alouette Regional District but which were not transferred to the Metro Vancouver Regional District (MVRD) when it expanded to include Pitt Meadows and Maple Ridge.

As a census division in the 2021 Census of Population conducted by Statistics Canada, the Fraser Valley Regional District had a population of 324,005 living in 118,217 of its 124,988 total private dwellings, a change of 9.5% from its 2016 population of 295,934. With a land area of 13,319.34 km² (5,142.63 sq mi), it had a population density of 24.3/km² (63.0/sq mi) in 2021.

According to the 2011 Census, 76.47% of Fraser Valley's population have English as mother tongue; Punjabi is the mother tongue of 10.02% of the population, followed by German (3.49%), Dutch (1.39%), French (1.07%), Korean (0.69%), Spanish (0.66%), Tagalog (0.35%), Chinese, n.o.s. (0.33%), and Vietnamese (0.30%).

While the member municipalities provide for their own municipal services, the FVRD acts as the local government for the electoral areas. As a local government or regional district, it can provide services such as water piping, storm sewers, sanitary sewers, street lighting, waste management, fire protection, mosquito control, enhanced 911 service, emergency preparedness/recovery, cablevision, air quality monitoring, library funding, growth management, park maintenance, building inspections and bylaw enforcement, planning, and development approvals. Each area does not necessarily receive all these services so each electoral area pays property taxes, through the provincial government, in accordance with the particular services they receive. The FVRD has opted to implement a regional growth strategy, as allowed by Section 25 of the BC Local Government Act.

The regional district is a federation of municipalities and electoral areas. Each municipality appoints councillors to the board of directors for the regional district in proportion to their relative population sizes and the electoral areas directly elect one director each.

Economically, the area has grown around resource extraction, specifically farming, logging and gravel mining. Much of the Fraser Valley's land base is within the Agricultural Land Reserve (ALR). The balance, not privately owned is in Crown Lands. Retirement and recreational services (like campgrounds, RV parks, boating, skiing etc.) have become increasingly important. However, most commercial and industrial activities are kept within the municipal boundaries and leaving the electoral areas for farming and rural residential uses.