El Cid Historic District, Historic district in West Palm Beach, Florida.

El Cid Historic District is a residential neighborhood in West Palm Beach containing approximately 280 buildings spread across 200 acres between Flamingo Drive, South Flagler Drive, Dyer Road, and South Dixie Highway. The homes date from the 1920s development period and display Mediterranean Revival and Mission architectural styles.

Benjamin Lainhart built the first permanent cabin on the western shore of Lake Worth in 1875, and by 1910 the Lainhart and Wilder homesteads had been divided into 22 parcels. Pineapple fields, ruined by Cuban competition and disease, gave way when Pittsburgh socialite Jay Phipps assembled the land and between 1923 and 1926 sold lots for Mediterranean Revival and Mission-style homes, naming the development El Cid after Rodrigo Díaz de Bivar.

Jay Phipps, son of Andrew Carnegie's partner in U.S. Steel, named the development after Rodrigo Díaz de Bivar (1040–1099), the Castilian leader who took Valencia in 1094; the Moors called him "Cid", Arabic for "lord". The streets carry Spanish names, and the Mediterranean Revival and Mission-style houses of 1923–1926 are what visitors walk past today.

The district lies between Flamingo Drive, South Flagler Drive, Dyer Road and South Dixie Highway, close to downtown West Palm Beach and the shore of Lake Worth. Its 281 historic buildings sit on a street grid, so walking between them is straightforward. Belvedere Road and Sunset Road cut through the area and help with orientation.

A single investor directed the large-scale development from 1923 to 1926 into a coherent urban vision. This concentrated building period under one vision explains the unusual architectural consistency across the neighborhood.