Another version was that "Llana Hermosa", meaning beautiful plain of white flowers was the original name of this town.

During the Bataan Death March, civilians of Hermosa risked the ire of the Japanese by secretly passing food to Filipino and American soldiers.

Hermosa is located directly south of Dinalupihan and south-southwest of San Fernando, Pampanga (the regional city center).

Today, fruit processing particularly of mangoes and bananas, handicrafts, and stuffed toys are the major produce of this town.

Probably less known, but existing for a long time is the aquaculture industry, traditionally for bangus, tilapia and crabs, but more recently for prawns, which was found more lucrative.

Major bus lines and mini-bus coming from Manila, San Fernando and Olongapo pass through the town of Hermosa while the most common type of transport within the municipality are jeepneys and tricycles.

The newly established Hermosa Public Market in barangay Palihan has also the terminal of vehicles going to Clark and Mabalacat in Pampanga via SCTEX.

The Subic Hermosa Cybercity is a 93-hectare Special Economic Zone which will host locator Businesses dealing in Information Technology (IT), manufacture of electronic products, IT research and development, and multi-media industries.

During the American rule (1898–1946) (History of the Philippines (1898-1946)), the elected Mayor and local officials, including the appointed ones held office at the Municipal Hall.