Rattlesnake Springs Historic District, Historic district with water springs in Eddy County, United States.

Rattlesnake Springs is an isolated unit of Carlsbad Caverns National Park in Eddy County, New Mexico, built around a spring in the Chihuahuan Desert. Its buildings include the 1940 Ranger's Residence and a 1933 Pueblo Revival pump house by William G. Carnes, plus Territorial Revival structures designed by Ken Saunders and Del Jones. Harrison's irrigation ditch and a fruit orchard remain part of the district.

William Henry Harrison built the first irrigation system at this spring in 1880 to use the water supply. The National Park Service later took over the system to supply Carlsbad Caverns National Park and continued developing the site.

The Ranger's Residence of 1940 and the 1933 Pump House, designed by William G. Carnes, are the district's notable Park Service buildings. Ken Saunders and Del Jones of the Santa Fe Branch of Plans and Designs drew later structures in the Territorial Revival style. Harrison's fruit orchard and the Park Service landscaping are counted as contributing elements of the historic district.

A visit combines easily with a Carlsbad Caverns tour since the site lies within the park boundaries. Early morning or late afternoon is best for visiting, when temperatures are milder and wildlife watching is more rewarding.

The spring's water made the site valuable enough that the National Park Service bought it in 1930 to supply Carlsbad Caverns, 6 miles (9.7 km) north and west. William Henry Harrison's irrigation ditch, dug in 1880, still shapes the landscaped grounds, and his fruit orchard is counted as a contributing element of the district.