Menard, Inc., doing business as Menards (/məˈnɑːrdz/ mə-NARDZ), is an American big-box home improvement retail chain headquartered in Eau Claire, Wisconsin. It is the third-largest home improvement retailer in the United States (behind Lowe's and Home Depot), with 341 stores in 15 U.S. states, primarily in the Midwest. The chain is privately owned by founder John Menard Jr.

In 1958, John Menard Jr. began building post-frame buildings to finance his college education. By the end of 1959, he found it necessary to hire extra crews, and to purchase more pieces of equipment to keep up with demand. After graduating from the Wisconsin State College at Eau Claire (now University of Wisconsin–Eau Claire) in 1962, Menard purchased land in Eau Claire, Wisconsin and built an office and shop. The company was founded in 1960  and incorporated in 1962. The first Menards hardware store opened in 1964. By opening a truss plant in the late 1960s, Menards grew to produce more substantial building materials on-site. The truss plant evolved into the Menard Building Division, which produced steel siding and roofing, interior and exterior doors, decking and treated lumber, and other materials. Between the 1970s and 1980s Menards began opening locations in Iowa, Minnesota, North Dakota and South Dakota. The company expanded into Nebraska in 1990, Illinois in 1991 and Indiana and Michigan in 1992. Menards sold the Menard Building Division in 1994, racking up 36 years in the pole building industry.

Menards was founded as Menard Cashway Lumber. In the early 1980s, the "Cashway Lumber" name was dropped and the business became simply known to this day as Menards (though it was spelled with an apostrophe-s well into the 1980s).

In 2000, the company opened its 150th store. During the early and mid 2000s, Menards expanded into Ohio.

In 2007, Menards opened its third and fourth distribution centers in Holiday City, Ohio, and Shelby, Iowa, which are 669,000 square feet (62,200 m²) and 735,000 square feet (68,300 m²), respectively. In 2008, the company expanded into Missouri. In 2009, Menards opened its first Wyoming location in Casper. Then it was followed by another location in Gillette and one more in Cheyenne. In 2011, the company expanded into Kansas. In 2012, Menards opened its first Kentucky location in Owensboro. Six more locations opened in Kentucky; one in Louisville, another in Paducah, another in Elizabethtown, another in Florence, another in Bowling Green, and the last one in Richmond.

In 2020, Menards expanded into West Virginia, opening four locations in that state: one in Wheeling, another in Morgantown, another in Barboursville and the last one in Bridgeport. There will be a fifth Menards in West Virginia in Parkersburg, followed by a sixth location in Charleston.

A fifth manufacturing and distribution center in Ravenna, Ohio began construction in Spring 2022 after a two-year-long delay. The distribution center in Ravenna will supplement the chain's expansion into Northeast Ohio and Western Pennsylvania. Menards announced in 2022 that it would open its first Pennsylvania location in Washington. A second Menards in Uniontown has been delayed.

In 2007, the 240,000 sq ft (22,000 m²) and larger Menards stores began selling groceries. At such locations, shoppers are able to purchase items such as frozen pizza, milk, eggs, common snacks, and a variety of canned items. In addition, these Menards locations carry items such as office supplies, pet supplies, and mattresses.