Natural Resources Conservation Service (NRCS), formerly known as the Soil Conservation Service (SCS), is an agency of the United States Department of Agriculture (USDA) that provides technical assistance to farmers and other private landowners and managers.

Its name was changed in 1994 during the presidency of Bill Clinton to reflect its broader mission. It is a relatively small agency, currently comprising about 12,000 employees. Its mission is to improve, protect, and conserve natural resources on private lands through a cooperative partnership with state and local agencies. While its primary focus has been agricultural lands, it has made many technical contributions to soil surveying, classification, and water quality improvement. One example is the Conservation Effects Assessment Project (CEAP), set up to quantify the benefits of agricultural conservation efforts promoted and supported by programs in the Farm Security and Rural Investment Act of 2002 (2002 Farm Bill). NRCS is the leading agency in this project.

The agency was founded largely through the efforts of Hugh Hammond Bennett, a soil conservation pioneer who worked for the Department of Agriculture from 1903 to 1952. Bennett's motivation was based on his knowledge of the detrimental effects of soil erosion and the impacts on U.S lands that led to the Dust Bowl in the 1930s. On September 13, 1933, the Soil Erosion Service was formed in the Department of the Interior, with Bennett as chief. The service was transferred to the Department of Agriculture on March 23, 1935, and was shortly thereafter combined with other USDA units to form the Soil Conservation Service by the Soil Conservation and Domestic Allotment Act of 1935.

The SCS was in charge of 500 Civilian Conservation Corps camps between 1933 and 1942. The primary purpose of these camps was erosion control. Since 1980 the agency has attempted to quantify the total soil erosion loss which annually matches the Dust Bowl losses during the height of its severity. In the 1980s, there were around 3,000 local Soil Conservation Service districts throughout the United States, each with elected executive boards. These districts provided financial as well as technical support, such as assistance inventorying natural resources, to land owners in their conservation efforts upon request.

Bennett continued as chief until his retirement in 1952. As part of the Federal Crop Insurance Reform and Department of Agriculture Reorganization Act of 1994, the agency was renamed the Natural Resources Conservation Service during the tenure of Chief Paul Johnson.

NRCS offers technical and financial assistance to farmers and ranchers. The financial assistance is authorized by the "Farm Bill", a law that is renewed every five years. The 2014 Farm Bill consolidated 23 programs into 15. NRCS offers these services to private land owners, conservation districts, tribes, and other types of organizations. NRCS also collects and shares information on the nation's soil, water, air, and plants.

The "Conservation" title of the Farm Bill (Title II in the 2014 bill) provides the funding to agricultural producers, and a conservation plan must be included. All of these programs are voluntary. The main programs include:

The Environmental Quality Incentives Program (EQIP) provides assistance to landowners to help them improve their soil, water and related natural resources, including grazing lands, wetlands, and wildlife habitat. Congress established the program in the 1996 farm bill to provide primarily cost-sharing assistance, but also technical and educational assistance, aimed at promoting production and environmental quality, and optimizing environmental benefits.