Grand total = 50(ish) depending on how you choose to count the boat crews.
Surprisingly non-bloody. There were only a few guests and most of the park's staff had already left. In the film, the death count was a measly 5. If you're a book fan, you can add an extra 1, with John Hammond getting et.
The Lost World: Jurassic Park
A bit more exciting, largely due to the presence of a clueless (and apparently delicious) mercenary army. When most of them got splattered, it brought the number up to a gore-friendly 17.
Jurassic Park III
Truly disappointing in every way, including bodycount (7). Everyone knows it's supposed to go up, not down.
Doesn't disappoint. Not only is it the most expensive of the four films, it was also the bloodiest with a total death-count of 22.
How Dangerous is Jurassic Park/World?
If we take Disneyland as a comparable attraction, in its 50+ year history, the total number of directly attributable guest deaths is less than 10, including the resort's hotels and car parks. During that period, some 100,000,000 have visited the park and its environs, indicating a chance of dying during a visit to be around 0.00001%
Jurassic World was open for 10 years years and has an average of 25000 visitors per day. Based on the number of guest deaths seen (2), the average chance of dying during a visit is around 0.000001%, making Jurassic World safer than Disneyland.