Candidates were facing a qualifying deadline at 5 p.m. Monday.
In north Mississippi's 1st District, three Republicans and four independents had filed by mid-Monday, while incumbent Travis Childers of Booneville was the only Democrat.
The Republicans are state Sen. Alan Nunnelee of Tupelo, former Eupora mayor Henry Ross and ex-FoxNews commentator Angela McGlowan of Oxford.
The independents, whose names will be on the Nov. 2 ballot with party winners, are A.G. Baddley, 4585 Fogg Rd., Hernando, Les Green, 2395 Bright Rd., Hernando, Wally Pang, 208 Dogwood Dr., Batesville and Rick 'Rico' Hoskins, 29230 Hwy. 6 East, Batesville.
Little is known about three of the independents. Pang, a restaurant owner, ran against Childers and others in a special election early in 2008.
Monday, Republican Ross issued a public challenge to his two GOP opponents for a series of six debates from March through May.
In the Delta's 2nd District, there were three Republicans and Democratic incumbent Bennie Thompson.
In the central 3rd District, two Democrats and Republican incumbent Gregg Harper had filed.
In the southern 4th District, there were two Republicans and Democratic incumbent Gene Taylor.
• The AP contributed to this report.