Parco Historic District, Historic company town district in Sinclair, Wyoming.

The Parco Historic District is the center of Sinclair, Wyoming, built in 1924–25 as a company town for the Producers and Refiners Oil Company refinery. It holds 93 buildings, 49 of them contributing structures, laid out around a central plaza with a consistent Spanish Colonial Revival design by the architects Fisher & Fisher. The Parco Inn, the Sinclair Theatre and Recreation Hall, the school, the library and the Community Church stand among its main buildings.

The town was built in 1924 to house workers for the Producers and Refiners Oil Company refinery under oil magnate Frank Kistler. Its creation reflected new ideas about planning purpose-built communities for industrial workers.

The name Parco comes from the Producers and Refiners Oil Company, whose acronym gave the town its first name; it became Sinclair in 1942 under the Sinclair Refining Company. Around the central plaza stand the Parco Inn, the Sinclair Theatre and Recreation Hall, the school, the library and the Community Church, all in the Spanish Colonial revival style of architects Fisher & Fisher.

The district lies along Sinclair's main street, with the Parco Inn and central plaza at its core and worker housing on the surrounding blocks. The 93 buildings stand close together, so the whole center can be covered on foot in a single walk; the Wyoming State Historic Preservation Office offers guided tours.

The district's 93 buildings share one design vocabulary because Fisher & Fisher planned the whole town in 1924–25 for the Producers and Refiners Oil Company. The result is a company town where worker housing, the school, library and Community Church all follow the same Spanish Colonial Revival scheme.