Codornices Creek (sometimes spelled and/or pronounced "Cordonices"), 2.0 miles (3.2 km) long, is one of the principal creeks which runs out of the Berkeley Hills in the East Bay area of the San Francisco Bay Area in California. In its upper stretch, it passes entirely within the city limits of Berkeley, and marks the city limit with the adjacent city of Albany in its lower section. As a watershed, the creek drains 1.1 miles of land into the ocean. Before European settlement, Codornices probably had no direct, permanent connection to San Francisco Bay. Like many other small creeks, it filtered through what early maps show as grassland to a large, northward-running salt marsh and slough that also carried waters from Marin Creek and Schoolhouse Creek. A channel was cut through in the 19th century, and Codornices flows directly to San Francisco Bay by way of a narrow remnant slough adjacent to Golden Gate Fields racetrack.

The name derives from the Spanish word "codornices", meaning "quails". California valley quail were once common in the area. The name was given by one of the Peraltas, owners of the 48,000 acre Rancho San Antonio. Luis Maria Peralta, military governor at San Jose, divided the land grant among his sons, giving the area that now is Berkeley and Albany to Domingo, who built his home on the banks of Codornices Creek near present day Albina Street.

The first of his dwellings was an adobe which was destroyed in the 1868 Hayward earthquake on October 21, 1868. He replaced it with a wooden structure which was razed in the 1930s for an apartment building. Both were located on the high banks of Codornices Creek across from the site of what today is St. Mary's College High School (Roman Catholic) near the Westbrae district of Berkeley.

In the 19th century, a quarry was opened at one of the heads of Codornices Creek in the La Loma district. It was replaced by a city park in the late 1960s. Another feeder comes down from Remillard Park. Others, on private land, have lovely small waterfalls.

Napoleon Bonaparte Byrne, a wealthy Missourian who crossed the plains before the Civil War, attempted to farm along the creek and built his large home (burned in the 1980s) on the south bank of the creek above today's Oxford Street. The Byrne family was accompanied by two freed slaves, believed to have been Berkeley's earliest African American residents. Byrne's property was later acquired by Henry Berryman, a developer who in 1877 built Berryman Reservoir south of today's Codornices Park, above Euclid. The reservoir became part of the East Bay Municipal Utility District system and was enlarged and covered, but has been drained because of fears it might rupture in an earthquake. In 2010 construction was begun on a replacement, a large tank on the site which was put into service in 2013.

From 1912 to 1928, a 275-foot-long wooden streetcar and road trestle spanned Codornices Creek along Euclid Avenue. In 1928, the trestle was filled in and a culvert laid through it for the creek.

Codornices Creek was recognized early for its beauty. In 1914, the Berkeley City Council voted to acquire Live Oak Park (north of Rose Street between Shattuck and Oxford) as Berkeley's first "nature park." In 1915, Codornices Park was opened along the east side of Euclid Avenue. In that streetcar era, both parks had busy club houses (now gone; Live Oak's was replaced by the current community center) and large picnic areas with stone fireplaces (still existing). Across Euclid from this park, the WPA constructed the Berkeley Rose Garden during the 1930s.

The creek flowed by Fleming Point, a promontory along the coasts of Albany that was demolished and flattened in 1939 to make room for the Golden Gate Fields Racetrack.