ArentFox Schiff LLP is a white shoe law firm and lobbying firm based in Washington, D.C., with offices in New York City, Boston, San Francisco, Los Angeles, Ann Arbor, Chicago, and Lake Forest. It represents corporations, politicians, and nonprofit organizations.

In addition to its lobbying practice, it has practices in antitrust, corporate, environmental, intellectual property, litigation, real estate, tax law, bankruptcy, international trade, corporate finance, and ERISA matters. The firm also has specialized practice groups for specific industries, such as metaverse law, the automotive industry, construction, healthcare, hospitality, energy, non-profit organizations, media and entertainment, sports, and life sciences.

In 1944, Albert E. Arent joined the law practice of Henry J. Fox, and together they founded Arent Fox. Other founders, Edwin L. Kahn, Harry M. Plotkin and Earl W. Kintner, were added, and the firm was renamed Arent, Fox, Kintner, Plotkin & Kahn.

In 2022, the firm merged with Schiff Hardin.