House Committee on Oversight and Government Reform

The Committee on Oversight and Government Reform has legislative jurisdiction over the District of Columbia, the government procurement process, federal personnel systems, the Postal Service and other oversight matters across the government. (source)

http://oversight.house.gov/

Chairman:
Rep. Jason Chaffetz [R-UT3]
Ranking Member:
Rep. Elijah Cummings [D-MD7]
Republicans:
25
Democrats:
18

The chairman is always selected from the majority party and the ranking member is the most senior member of the minority party. The majority party ensures it has a majority on every committee.

Chairman
Jason Chaffetz
UT-3
Republican
Ranking Member
Elijah Cummings
MD-7
Democrat
National ...
Ron DeSantis
FL-6
Republican
Chair, Subcommittee on National Security
Information ...
Will Hurd
TX-23
Republican
Chair, Subcommittee on Information Technology
Health ...
Jim Jordan
OH-4
Republican
Interior
Cynthia Lummis
Wyoming
Republican
Chair, Subcommittee on The Interior
Government ...
Mark Meadows
NC-11
Republican
Chair, Subcommittee on Government Operations
Transportation ...
John Mica
FL-7
Republican
Chair, Subcommittee on Transportation and Public Assets
Justin Amash
MI-3
Republican
Rod Blum
IA-1
Republican
Brendan Boyle
PA-13
Democrat
Ken Buck
CO-4
Republican
Buddy Carter
GA-1
Republican
Matthew Cartwright
PA-17
Democrat
Lacy Clay Jr.
MO-1
Democrat
Gerald Connolly
VA-11
Democrat
Jim Cooper
TN-5
Democrat
Mark DeSaulnier
CA-11
Democrat
Scott DesJarlais
TN-4
Republican
Tammy Duckworth
IL-8
Democrat
John “Jimmy” Duncan Jr.
TN-2
Republican
Blake Farenthold
TX-27
Republican
Paul Gosar
AZ-4
Republican
Trey Gowdy
SC-4
Republican
Glenn Grothman
WI-6
Republican
Jody Hice
GA-10
Republican
Robin Kelly
IL-2
Democrat
Brenda Lawrence
MI-14
Democrat
Ted Lieu
CA-33
Democrat
Michelle Lujan Grisham
NM-1
Democrat
Stephen Lynch
MA-8
Democrat
Carolyn Maloney
NY-12
Democrat
Thomas Massie
KY-4
Republican
Mick Mulvaney
SC-5
Republican
Eleanor Norton
District of Columbia
Democrat
Gary Palmer
AL-6
Republican
Stacey Plaskett
Virgin Islands
Democrat
Steve Russell
OK-5
Republican
Michael Turner
OH-10
Republican
Tim Walberg
MI-7
Republican
Mark Walker
NC-6
Republican
Bonnie Watson Coleman
NJ-12
Democrat
Peter Welch
Vermont
Democrat

There are 652 bills referred to this committee. Below find the top 100: