X-MEN / ALPHA FLIGHT (1984)
art by John Byrne/George Perez (inked in 2003)
from ha.com

CYCLOPS (2008)
art by George Perez

COLOSSUS (2011)
art by George Perez
from webb237 

ANGEL (2016)
art by George Perez
from epikosccg 

HAVOK & POLARIS (2002)
art by George Perez
from comicartshop.com 

MR SINISTER (2016)
art by George Perez
from mikrocomix 

CYCLOPS (Oct 2012)
art by George Perez at NEW YORK COMIC-CON 2012 
from Saad Cheema 

MAGNETO (Sep 2016)
art by George Perez at DRAGON*CON 2016
from Todd Sommerfield

MARVEL GIRL (2003)
art by George Perez
from Leonard Richman

X-MEN JAM (2012)
Colossus art by George Perez
from lastexit4597

APOCALYPSE (20 Sep 2015)
art by George Perez at AMAZING HAWAII COMIC CON 2015
from letsmakeasell84

NIGHTVEIL (2015)
art by George Pérez
from Keith Paquette

NIGHTVEIL (1981)
art by George Pérez / Bill Black
published  in PRETTY GIRL SKETCHBOOK #1 (1981)

BLACK QUEEN (2015)
art by George Perez
from Todd Sommerfield  

CABLE (Jun 2015)
art by Pérez AMAZING LAS VEGAS COMIC CON 2015
 from kaholo1256

KREE VS BISHOP (Apr 2005)
art by Pérez & Tom Smiht at PITTSBURGH COMICON 2005
 from by Dan Frasier

PSYLOCKE (20 Jul 2006)
art by George Pérez at SAN DIEGO COMIC-CON 2006 from by Michael Hosey

NIGHTCRAWLER (2013)
art by George Pérez
from Scott Lucas

PHOENIX (Aug 2013)
art by George Pérez at DRAGON*CON 2013

COLOSSUS (1992)
art by John Byne and George Perez (2003)
from Ken Danker

SCARLET WITCH VS DARK PHOENIX (Jul 2013)
art by Perez at SDCC 2013

SPIDER-WOMAN VS MYSTIQUE (Jul 2013)
art by Perez at SDCC 2013

DAZZLER (May 2013)
art by George Perez at COMICPALOOZA 2013
from qube 808

DAZZLER (2013)
art by George Perez from Pop Culture Company

CAPTAIN AMERICA VS CYCLOPS (2013)
art by Mitch Breitweiser and George Perez
from Akoni Kaholo

SPIDER-WOMAN VS MYSTIQUE (Jul 2013)
art by Perez at SDCC 2013
from Michael Hosey

SCARLET WITCH VS DARK PHOENIX (Jul 2013)
art by Perez at SDCC 2013
from Michael Hosey

SHADOWCAT (2012)
art by George Perez
from carlos lising

CYCLOPS (2013)
art by George Pérez
from piersonite2012

X-MEN (2002)
art by George Pérez
from mark ou

CABLE (Feb 2013)
art by George Pérez at LONDON SUPER COMIC CONVENTION 2013

CYPHER / WARLOCK (2013)
art by George Pérez
from Icon UK

DARK PHOENIX (2012)
art by George Pérez
from platinumcomix

MAGNETO (2012)
art by George Pérez
from platinumcomix

PROFESSOR X (Oct 2012)
art by George Pérez at NEW YORK COMIC-CON 2012
from  Romeo Lavarias 

MAGNETO (2012)
art by George Pérez
from  wrestlezone85 

EMMA FROST (2012)
art by George Pérez
from bopx11

EMMA FROST (2012)
art by George Pérez
from Brian Morris

EMMA FROST (2012)
art by George Pérez
from Darby Watkins

NIGHTCRAWLER (2012)
art by George Pérez
from Louie La Palombara III

KITTY PRYDE (May 2012)
art by George Pérez at DALLAS COMIC CON 2012
from Brian Keohan

DARK PHOENIX (Feb 2006), art by George Pérez from MEGACON 2006, from tony kordos

DARK PHOENIX (2003), art by George Perez, from Gregg Mayer

PROFESSOR X (1978?), art by George Perez, from Perez Fan

CORSAIR (1978?), art by George Perez, from Perez Fan

BANSHEE (30 Jul 1978), art by George Perez, from Perez Fan

DARK PHOENIX (Sep 2010), art by George Pérez at JORNADAS DE CÓMIC 2010, from Juan Rojas Caballero

X-MEN #218 PRELIMINARY COVER (1987), art by Arthur Adams and George Perez, from Tyler Chin-Tanner

MARVEL GIRL (2006), art by George Perez, from Keith Bradshaw

MYSTIQUE (2004), art by George Perez, from George Perez Fan Page

STORM AND NIGHTCRAWLER (1978), art by George Perez, from jryanj1

PHOENIX (28 Jul 1978), art by George Perez, from Malvin V

X-MEN (1982), art by John Byrne, George Perez, Bill Sienkewicz, Dave Cockrum, and Bob Wiacek, from Albert Moy

CYCLOPS & DARK PHOENIX (1992), pencils by John Byrne, inked by George Perez (2004), from monsters collectibles.com

X-MEN (1980?), art and color by George Perez

X-MEN , published in ACCENT ON THE FIRST E, from Christos

X-MEN (1990), art by George Perez, colors by Steve Oliff. From Collecting Fool, thanks to Ilke Hincer (email)

X-MEN (1999), art by George Perez, recreation of Perez / Austin's cover fromUNCANNY X-MEN #112. From Anthony Snyder

X-MEN (2000), published in ULTIMATE X-MEN, from Anthony Snyder

X-MEN (2000), published in ULTIMATE X-MEN, Scan from Jack Malley

X-MEN (2000), from X-MEN & AVENGERS: GAMMA QUEST #3

PHOENIX (2005)

DARK PHOENIX (Mar 2005), art by George Pérez at WIZARD WORLD, LOS ANGELES, CA 2005 (Mar 18-20, 2005) , commissioned by Michael Hosey.

DARK PHOENIX (Apr 2005), art by George Perez at PITTSBURGH COMICON 2005. Commissioned by Sean Norek