The "very orange" roadster marks a symbolic milestone for Tesla which is now producing approximately 20 cars a week. Production will increase to 30 a week in the coming months.
About 1,000 people are waiting to take ownership of their Roadster, which means Tesla is sold out through October of this year.
The Roadster remains the only highway-capable production electric vehicle of any kind (not just in the sports car category) for sale in the US or Europe. It does 0-100km/h in 3.9 seconds yet is twice as energy efficient as a Toyota Prius.
The 250th delivery comes on top of news that Tesla will unveil its Model S prototype sedan on March 26.
The Model S will likely be the world's first mass-produced, highway-capable EV when it rolls off the assembly line in late 2011.
With an anticipated base price of $57,400, the effective price will be $49,900 after the US federal tax credit of $7500.