New York City Mayor-elect Bill de Blasio said Tuesday his Jan. 1 inauguration at City Hall Park will be open to the public via a number of tickets that will be available online this week.

Gabrielle Fialkoff, chairwoman of the inauguration ceremony, said de Blasio didn't want his swearing-in to be limited to the political elite and the media.

"We really wanted to make certain, and make a special effort, that we had the ability to invite folks who are our supporters from all over the city," she said.

Fialkoff said there will be 5,000 seats at the noon ceremony, which also will include the swearing-in of Public Advocate-elect Leticia James and Comptroller-elect Scott Stringer. Organizers are still working out how many of those seats will go to the public.

A website will be launched along with more information about obtaining tickets.

The inauguration chairwoman said a ticket has been offered to Mayor Michael Bloomberg.

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Ticket holders will be treated to food and refreshments at a post-inauguration party and might have a chance to meet de Blasio.

Those who miss out on Jan. 1 will have an opportunity to see the mayor-elect in person four days later.

On Jan. 5, de Blasio's team will offer New Yorkers a tour of Gracie Mansion, which will house the first family for the first time in a dozen years. Bloomberg chose to live in his Upper East Side town house.

Visitors will be able to see all of the rooms on the first floor with a historian, who will fill them in on the mansion's history.

At the end of the tour, they will meet de Blasio and be photographed with him.