Irdinansyah Tarmizi lahir di Bukittinggi, Sumatera Barat. Ia menjabat Bupati Tanah Datar sejak Februari 2017. Di bawah pemerintahannya, Tanah Datar dinobatkan sebagai Kabupaten Terbaik dari 415 kabupaten se-Indonesia di bidang Perencananaan dan Pencapaian. Sebelumnya, ia menjabat sebagai Wakil Bupati Tanah Datar dan menjadi Anggota DPRD Sumbar selama hampir dua periode sejak 2004 hingga 2014, serta anggota DPRD Kota Padang selama hampir tiga periode sejak 1992. Ia tercatat pernah menjadi Wakil Ketua Pemuda Muhammadiyah Kota Padang dan Ketua KNPI Kota Padang.

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Irdinansyah Tarmizi was born in Bukittinggi, West Sumatra. He served as Regent of Tanah Datar since February 2017. Under his administration, Tanah Datar was named the Best District of 415 districts in Indonesia in the area of Planning and Achievement. Previously, he served as Deputy Regent of Tanah Datar and was a Member of the West Sumatra DPRD for almost two periods from 2004 to 2014, as well as members of the Padang City DPRD for almost three periods since 1992. He was recorded as a Deputy Chairperson of the Muhammadiyah Youth City of Padang and Chairman of the Padang City KNPI.