Samuel Curtis Johnson Jr. (March 2, 1928 – May 22, 2004) was an American businessman. He was the fourth generation of his family to lead S. C. Johnson & Son, Inc., a consumer products company headquartered in Racine, Wisconsin. The son of Herbert Fisk Johnson Jr., he turned a relatively small wax company into a multibillion-dollar global household name. A philanthropist and environmentalist, Johnson led his company and community "to protect this planet and leave it a better place for future generations to live," noting, "A good executive, a busy executive, always has time to do some other things, especially for the good of the community."

Johnson grew up in Racine, Wisconsin and spent most of his life there. A graduate of the Asheville School in North Carolina, he attended Cornell University and was selected for membership in the Sphinx Head Society before his 1950 graduation with a bachelor's in economics. He then attended the Harvard Business School, from which he graduated in 1952 with a master's in business administration. Johnson also served in the U.S. Air Force as an intelligence officer for 2 years.

In 1967, Johnson became chairman of S. C. Johnson & Son, Inc., and turned a $171 million floor wax company into a multibillion-dollar empire of four global companies which in 2004 employed over 28,000 people and sold products in 110 countries.

Johnson's biggest impact on the business was his role in diversification. Said Johnson, "The primary objective for a corporate leader is to ensure institutional survival.... To survive you have to grow. To grow you have to diversify... When a company is diversified into various fields, it is rarely seriously vulnerable to the ups and downs that ravage individual business. And if you are geographically diversified... then you have some insulation between yourself and localized political and economic trouble."

Johnson's great-grandfather, Samuel Curtis Johnson Sr., founded the S.C. Johnson Company in 1886 as a parquet floor manufacturing business. The company, renamed S.C. Johnson & Son in 1906 when Johnson's grandfather, Herbert Fisk Johnson Sr., became a partner, began selling wax for hardwood floors in the early 20th century as an additional service. The wax business became more lucrative than parquet floors as the company developed products for surfaces as diverse as dance floors and airplanes.

Johnson's father, Herbert Fisk Johnson Jr., later joined the company commonly referred to as Johnson Wax and became president in 1928. Johnson joined the company in 1954 as assistant to the president and was promoted to new products director in 1955, where he spearheaded the development of the aerosol insecticide, what he called "the first Johnson Wax product without wax." He went on to create the first aerosol air freshener (Glade), the first aerosol insect repellent (OFF!) and the first aerosol furniture polish (Pledge.)

In 1958, Johnson became vice president of the newly formed New Service Products Division and in 1960, he moved to London and served the company as European regional director. It was in this capacity that he noticed other American products on a store shelf in Italy and became determined to never again be late to a global market.

Before becoming elected company president, Johnson served as international vice president in 1962 and moved back to Racine in 1963 as executive vice president. In 1967, he was also elected chairman and chief executive officer. In 1972, he stepped down as president but continued in his capacities as chairman and CEO of the consumer business until 1988. In 1993, he was elected non-executive chairman of the board, a position he held until his retirement in 2000, when he became chairman emeritus of what was then known as SC Johnson – A Family Company.