An interior rearview mirror assembly for a vehicle, said interior rearview mirror assembly comprising: an electrochromic reflective element, wherein said reflective element comprises a front glass substrate and a rear substrate with an electrochromic medium disposed therebetween, and wherein said electrochromic medium is bounded by a perimeter seal; wherein said front glass substrate has a first surface that generally faces a driver of the vehicle when said interior rearview mirror assembly is normally mounted in the vehicle and a second surface opposite said first surface, with a transparent electrically conductive coating established at said second surface of said front glass substrate, and wherein said rear substrate has a third surface and a fourth surface opposite said third surface, and wherein said electrochromic medium is disposed between said second surface of said front glass substrate and said third surface of said rear substrate; wherein said reflective element comprises an electrochromic active region where said electrochromic medium is disposed and is bounded by said perimeter seal; and a perimeter portion of said front glass substrate that extends beyond a corresponding perimeter portion of said rear substrate to establish a user input region 34 that is outboard of said electrochromic active region; a touch sensor disposed behind said front glass substrate at said user input region; wherein said touch sensor is operable to detect the presence or touch of a person's finger at said first surface of said front glass substrate at said user input region; and wherein circuitry is operable to at least one of (a) limit accidental actuation of said touch sensor, (b) limit accidental actuation of said touch sensor when said first surface of said front glass substrate is at least one of wiped and washed, and (c) limit accidental actuation of said touch sensor when said reflective element is adjusted to adjust the driver's rearward field of view; said interior rearview mirror assembly characterized by: said touch sensor comprising a capacitive touch sensor and said capacitive touch sensor comprising a part of said transparent electrically conductive coating established at said second surface of said front substrate at said user input region, wherein said part of said transparent electrically conductive coating at said user input region is electrically isolated from the part of said transparent electrically conductive coating that is established at said electrochromic active region. an electrochromic reflective element, wherein said reflective element comprises a front glass substrate and a rear substrate with an electrochromic medium disposed therebetween, and wherein said electrochromic medium is bounded by a perimeter seal; wherein said front glass substrate has a first surface that generally faces a driver of the vehicle when said interior rearview mirror assembly is normally mounted in the vehicle and a second surface opposite said first surface, with a transparent electrically conductive coating established at said second surface of said front glass substrate, and wherein said rear substrate has a third surface and a fourth surface opposite said third surface, and wherein said electrochromic medium is disposed between said second surface of said front glass substrate and said third surface of said rear substrate; wherein said reflective element comprises an electrochromic active region where said electrochromic medium is disposed and is bounded by said perimeter seal; and a perimeter portion of said front glass substrate that extends beyond a corresponding perimeter portion of said rear substrate to establish a user input region 34 that is outboard of said electrochromic active region; a touch sensor disposed behind said front glass substrate at said user input region; wherein said touch sensor is operable to detect the presence or touch of a person's finger at said first surface of said front glass substrate at said user input region; and wherein circuitry is operable to at least one of (a) limit accidental actuation of said touch sensor, (b) limit accidental actuation of said touch sensor when said first surface of said front glass substrate is at least one of wiped and washed, and (c) limit accidental actuation of said touch sensor when said reflective element is adjusted to adjust the driver's rearward field of view; said touch sensor comprising a capacitive touch sensor and said capacitive touch sensor comprising a part of said transparent electrically conductive coating established at said second surface of said front substrate at said user input region, wherein said part of said transparent electrically conductive coating at said user input region is electrically isolated from the part of said transparent electrically conductive coating that is established at said electrochromic active region.