Bullitt County is named after Alexander Scott Bullitt, one of the architects of Kentucky government, and was created on January 1, 1797. It was formed out of parts of Jefferson and Nelson County. In 1811, the current northwestern area of the county was formed from land given by Jefferson County, and when Spencer County was created in 1824, land from the eastern boundary was given to them.
In the late 1700s to the mid 1800s, Bullitt County was the site of thriving Salt and Iron works industries.
On May 28, 1996 a large tornado outbreak occurred and an F4 tornado hit Brooks and Pioneer Village causing millions of dollars in damage but only 10 injures. A more recent tornado outbreak happened in mid-October 2007 from Florida to Michigan, from Oklahoma to Ohio. One tornado hit Bullitt County twice getting to strength of an EF1.
Bullitt County, which is bisected by I-65, the main north-south transportation corridor, has grown into a thriving distribution hub, and several of its major business parks are just about from Louisville International Airport and UPS’s global air-freight hub Worldport. More than of distribution, warehousing and other complexes have been built and absorbed in Bullitt County since 2000, and additional construction is ongoing.
Additionally, Bullitt residents have easy access to major job centers such as Fort Knox, and Louisville.
Knobs State Forest in Bullitt County, Kentucky's newest state forest, has added , bringing the total size to . The forest will have no visitor’s center or other man-made features, and it initially will have no established trails. Gwen Holt, information officer for the Division of Forestry said she expects it to be used for hiking, with trails being worn in over time, wildlife viewing, and picnicking. You can even bring your dogs if you keep them on a leash.
Knob State Forest is located near the nationally recognized Bernheim Arboretum and Research Forest, about south of Louisville.
As of the census of 2000, there were 61,236 people, 22,171 households, and 17,736 families residing in the county. The population density was 205 people per square mile (79/km²). There were 23,160 housing units at an average density of 77 per square mile (30/km²). The racial makeup of the county was 98.07% White, 0.38% Black or African American, 0.34% Native American, 0.27% Asian, 0.01% Pacific Islander, 0.16% from other races, and 0.77% from two or more races. 0.63% of the population were Hispanic or Latino of any race.
There were 22,171 households out of which 39.00% had children under the age of 18 living with them, 65.40% were married couples living together, 10.40% had a female householder with no husband present, and 20.00% were non-families. 16.40% of all households were made up of individuals and 5.40% had someone living alone who was 65 years of age or older. The average household size was 2.75 and the average family size was 3.07.
In the county the population was spread out with 27.20% under the age of 18, 8.60% from 18 to 24, 32.70% from 25 to 44, 23.70% from 45 to 64, and 7.80% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 98.90 males. For every 100 females age 18 and over, there were 97.20 males.
The median income for a household in the county was $50,058 (2005), and the median income for a family was $49,481. Males had a median income of $35,851 versus $24,098 for females. The per capita income for the county was $18,339. About 6.20% of families and 7.90% of the population were below the poverty line, including 11.40% of those under age 18 and 7.60% of those age 65 or over.
The Shepherdsville Division of Fire provides their residents with four man crew on staff 24 hours a day. The crew consists of a Captain, Sergeant, and two Firefighters. Shepherdsville Fire also has four live-in firefighters who live at Station 1 for a faster response time for a second apparatus. Shepherdsville Fire opened a new firehouse in November 2006, located in the Shepherdsville Government Center in addition to the existing Station 2 on Frank E. Simon Blvd. Shepherdsville also has 30-35 volunteer firefighters to augment the paid personnel. In September 2008 the City of Shepherdsville received a SAFER grant from the federal government. The $500,000 grant will allow the hiring of six full time firefighters.
Nichols, Southeast Bullitt, and Lebanon Junction are all volunteer-based.
Zoneton Fire Protection District is 59 square miles (153 km²) with coverage from two stations. A $1 million expansion to Station 1 was completed in October 2006 providing more offices, apparatus storage, dormitories, and training facility. Zoneton also has live-ins at both stations to provide faster response times.