H. Leh & Co., typically referred to simply as Leh's, was a department store located at 626 West Hamilton Street in Allentown, Pennsylvania. It was part of what was an outside mall structure called the Hamilton Mall in the Center City portion of the city. Like many other downtown department stores of the time, however, it ultimately closed as suburban shopping malls gained market share at the expense of inner-city stores.

Henry Leh, the founder of Leh's, was born in Allentown, Pennsylvania in 1830. On April 25, 1850, he founded the store at 626 Hamilton Street in Allentown. He initially sold ready-to-wear clothes to what were then 4,000 citizens of Allentown, something that was then very rare in that part of the state. And if they needed boots and shoes, he would not only sell them but make them. The building was a four-story building. The upper three floors housed Leh's manufacturing factory, and the ground floor was Leh's retail store.

The early years were not easy for the retail store he first named Neleigh & Leh. Leh had to get all of his merchandise by canal boat and stagecoach. Between 1850 and 1860, he had several business partners. In the latter part of the 1850s, the company struggled but survived a national economic depression.

The American Civil War helped Leh's development. The Union Army needed boots. Since Simon Cameron, then the Secretary of War, was from Pennsylvania, many federal government contracts flowed to the state. With a contract to make boots, Leh was able to put the store on a sound fiscal footing.

During the Civil War, Leh had a manufacturing payroll of about 175 people, with sixty to sixty-five machines in constant use. He manufactured about 500 pairs of boots and shoes each day. He also expanded his business to include the neighboring stores at 628 and 630 Hamilton Street.

As Allentown prospered in the post-Civil War era, so did Henry Leh. The store was well established in 1874 when a young man named Horatio Koch obtained a job there as a shipping clerk. Koch quickly advanced in the company. Shortly thereafter, Koch married Leh's daughter, Sallie, joining the two families, and Koch became a partner in Leh's Department Store.

At the 1876 Centennial Exposition in Philadelphia, Leh had a display of men's and women's boots and shoes that his manufacturing plant produced. The judges at the Exposition noted that it was, "A good exhibit of Women's, Misses and Children's heavy and substantial shoes, prime stock and workmanship, and good, full fitting and strong work. The heavy mining boot, borgan and buckle shoe are very superior articles for purposes intended. Prices of goods were very reasonable".

In the 1880s, the store had expanded its products beyond shoes, selling dry goods, fabrics, ready to wear clothing, and other goods, and turning the company into a department store.