A memorial has been erected at the site of an old oak tree, and there is a rumor that Amelia was buried just down the hill from where their house once stood,(which now borders the Enterprise Products gas storage facility).

A 1985 explosion at one of the plants threatened the entire salt dome on which the city was built, which had in recent years been used to store liquid petroleum gas, and led to a series of efforts by townspeople to force the petrochemical industries to buy out the homes in the immediate vicinity of their plants.

Among the buildings at the new site were a city hall, several new churches, and the relocated Barbers Hill ISD schools.

Another core was developed south of the original city along Texas State Highway 146 north of Interstate 10; this core is based mostly on commercial services for Interstate 10 travelers hosting multiple hotels, fast food restaurants, and gas stations.

In 2019 Dwight Silverman of the Houston Chronicle described Mont Belvieu as "a fairly affluent city" due to its taxes on the various area industrial plants.

Mont Belvieu won a court agreement in 2017 that internet is a utility, like electricity and water.

Mont Belvieu chose this path because it was unable to persuade private telecommunications companies to expand or add new infrastructure for internet purposes, even after the city government offered to have the cables laid.

[7] The United States Postal Service operates the Mont Belvieu Post Office at 16043 Eagle Drive, 77580-9700.

The portion of Mont Belvieu in Chambers County is served by the Barbers Hill Independent School District.

[25] The portion in Liberty County is zoned to Dayton Independent School District.