Hawaii's 1st congressional district is a congressional district in the U.S. state of Hawaii. The district is entirely on the island of Oahu, encompassing the urban areas of the City and County of Honolulu, a consolidated city-county that includes Oahu's central plains and southern shores, including the towns of Aiea, Mililani, Pearl City, Waipahu, and Waimalu. The district is smaller and more densely populated than the 2nd congressional district (which comprises the rest of the state). It is represented by Democrat Ed Case.

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Hawaii's 1st congressional district
Interactive map of district boundaries since January 3, 2023
Representative	Ed Case D–Kāneʻohe
Distribution	99.27% urban 0.73% rural
Population (2022)	717,738
Median household income	$96,086[1]
Ethnicity	49.9% Asian 17.5% Two or more races 14.8% White 7.9% Pacific Islander Americans 7.8% Hispanic 1.8% Black 0.4% other
Cook PVI	D+14[2]

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When Hawaii and Alaska were admitted to the Union in 1959, both new states were granted one at-large representative to Congress, pending the next United States census. In the reapportionment following the 1960 U.S. census, Hawaii gained a second U.S. representative. Instead of creating two congressional districts, the state continued to elect its representatives at large. Two representatives were first elected in 1962, and Hawaii was first represented by two U.S. representatives on January 2, 1963, upon the convening of the 88th Congress.

The 1st congressional district was created in 1971, when Hawaii began electing its representatives from districts instead of electing at-large representatives statewide.

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District established following the 91st Congress.

• Hawaii's congressional districts
• List of United States congressional districts