Sussex skipper Ben Brown and his side have been handed their four fixtures for the second stage of the LV Insurance= Championship.
The county are in the third division of the competition.
They will go to New Road to face Worcestershire from Monday, August 30.
Middlesex visit Hove a week later, from Monday, September 6.
On Sunday, September 12, Sussex start a game at Leicestershire, with start times by now moving forward to 10.30am.
Their season is completed by a visit to the 1st Central County Ground from Derbyshire, which starts on Tuesday, September 21 (10.30am).
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Kent will also be in the six-team division but the teams will not meet again having played home and away in the first phase of the competition.
Hampshire, Warwickshire, Somerset, Nottinghamshire, Lancashire and Yorkshire will compete for the title after qualifying for the six-team division one.
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