/C O R R E C T I O N -- Prosperity Bancshares, Inc./

In the news release, Prosperity Bancshares, Inc. (R) (Nasdaq: PRSP)
Invites You To Join Its First Quarter Earnings Conference Call On The Web,
issued earlier today by Prosperity Bancshares, Inc. over PR Newswire, we are
advised by the company that the third paragraph, first sentence, should read
"Prosperity Bancshares, Inc. declared a quarterly cash dividend of $0.125 per
share" rather than "$0.1125 per share" as originally issued inadvertently.

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Prosperity Bancshares, Inc.(R) Invites You To Join Its First Quarter Earnings
Conference Call On The Web
First Quarter Cash Dividend Announced
HOUSTON, March 31 /PRNewswire-FirstCall/ -- In conjunction with Prosperity
Bancshares, Inc.(R) (Nasdaq: PRSP) First Quarter Earnings Announcement,
scheduled before the market opens on Friday, April 18, 2008, you are invited
to listen to its conference call that will be broadcast live over the Internet
at 10:30 AM, Eastern Daylight Time (9:30 AM, Central Daylight Time) on Friday,
April 18, 2008. Participants will include David Zalman, Chairman and Chief
Executive Officer; Dan Rollins, President and Chief Operating Officer; Tim
Timanus, Vice Chairman; and David Hollaway, CPA, Chief Financial Officer.
What: Prosperity Bancshares, Inc.(R) First Quarter Earnings
Announcement

When: Friday, April 18, 2008 9:30 AM (Central Daylight Time)

Where: http://www.prosperitybanktx.com on the Investor Relations page

How: Live over the Internet -- Simply log on to the web at the address
above or call 800-894-5910, the reference code is PBTX.

Contact: Dan Rollins, President & Chief Operations Officer at
(281) 269-7199 or dan.rollins@prosperitybanktx.com

If you are unable to participate during the live webcast, the call will be
archived on the Web site at http://www.prosperitybanktx.com on the Investor
Relations page. To access the replay, click on the conference call section and
follow the instructions.
Prosperity Bancshares, Inc. First Quarter Dividend
Prosperity Bancshares, Inc. declared a quarterly cash dividend of $0.1125
per share to holders of Prosperity's common stock. The first quarter dividend
is payable on April 1, 2008 to all shareholders of record as of March 17,
2008.
Prosperity Bancshares, Inc.(R)
Prosperity Bancshares, Inc.(R), a $6.4 billionHouston, Texas based
regional financial holding company, formed in 1983, was named to the Keefe
Bruyette & Woods, Inc. 2007 Honor Roll for achieving exceptional earnings per
share growth for the past 10 years. Other recent honors include being named
to the Sandler O'Neill & Partners 2005 Bank and Thrift Small All Stars, listed
in US Banker's August 2005 Top 100 Publicly Traded Mid-Tier Banks, ranked #2
out of 195 publicly traded companies in the 2005 Stephens, Inc. Bank and
Thrift Performance Matrix and listed on the Houston Chronicle's Houston 100
list.
Operating under a community banking philosophy, Prosperity seeks to
develop broad customer relationships based on service and convenience.
Prosperity offers a variety of traditional loan and deposit products to its
customers, which consist primarily of small and medium sized businesses and
consumers. In addition to established banking products, Prosperity offers a
complete line of services including: Internet Banking services at
http://www.prosperitybanktx.com, Retail Brokerage Services, MasterMoney Debit
Cards, and 24 hour voice response banking. Prosperity currently operates one
hundred thirty (130) full service banking locations and one (1) loan
production office; forty-six (46) in the Houston CMSA; thirty-three (33) in
the South Texas area including Corpus Christi and Victoria; twenty-six (26) in
the Dallas/Fort Worth metroplex; two (2) in the East Texas area; twenty-three
(23) in the Central Texas area including Austin and Bryan/College Station and
one (1) loan production office in San Antonio.
*Minimum Requirements to listen to broadcast: At least a 28.8 Kbps
connection to the Internet and the Windows Media Player software, downloadable
free from
http://www.microsoft.com/windows/windowsmedia/player/download/download.aspx.
SOURCE Prosperity Bancshares, Inc.

Dan Rollins, President & Chief Operating Officer of Prosperity Bancshares,
Inc., +1-281-269-7199, dan.rollins@prosperitybanktx.com