Wyomissing /waɪəˈmɪsɪŋ/ is a borough in Berks County, Pennsylvania, United States, adjacent to Reading.

The growth was significantly larger between 2000 and 2010 largely because of its merger in January 2002 with neighboring Wyomissing Hills.

[5] The borough is recognized as a Tree City USA[6] and selected as a "Contender" for the best places to live in Pennsylvania by Money magazine.

The northeastern boundary of Wyomissing with Reading is formed by Tulpehocken Creek and a small portion of the Schuylkill River.

Wyomissing Creek flows from southwest to northeast towards the Schuylkill, through the southern part of the borough.

[3] In the vicinity of the Knitting Mills, formerly the Vanity Fair complex, average monthly temperatures range from 30.6 °F in January to 75.9 °F in July.

In 1896, present-day Wyomissing began to take form when Reading lumber dealer Thomas P. Merritt acquired 600 acres (240 ha).

Ferdinand Thun, Henry K Janssen, and Gustav Oberlaender became known as "The Big Three of Wyomissing Industries.

[11] Wyomissing Industries comprised Narrow Fabric Co., Textile Machine Works and Berkshire Knitting Mills.

The last farmland worked in the borough was part of the Hartman Farm at the intersection of Woodland and Papermill roads.

Wyomissing is a thriving commercial office and retail center, in large part due to its proximity to Reading and its highway access.

The Berkshire Mall is located in Wyomissing along with several other large shopping centers with their retail giants and restaurants.

As crime soared in Reading throughout the 1990s, companies and corporations relocated from the city to newer, Class A office space in the borough.

Routes 422 and 222, providing immediate highway access to the rest of the greater Philadelphia and Berks County region.

Sovereign was acquired by Santander Group, which maintains its regional office at the same location in the borough.

Financial giants Merrill Lynch, Goldman Sachs, and Citibank are developing data backup centers using the region's close proximity to major fiber optic lines running down the East Coast.

Pennsylvania Route 12 begins at US 222/US 422 in Wyomissing and continues northeast along the Warren Street Bypass toward the northern part of Reading and Pricetown.

[19] Wyomissing is served by multiple Berks Area Regional Transportation Authority (BARTA) bus routes including 12, 14, 15, and 16, which serve residential and business areas in the borough and connect the borough to the BARTA Transportation Center in Reading and other points in Berks County.

[19][21] Wyomissing was proposed to be the western terminus of a section of the Schuylkill Valley Metro (SVM) passenger rail service.