Concordia is a neighborhood in the Northeast section of Portland, Oregon, United States, named after Concordia University, which was located within it. The neighborhood borders are NE 22nd Ave. on the west, NE Columbia Blvd. on the north, and NE 42nd Ave. on the east. On the south, the border is NE Prescott St. and NE Alberta Ct., to the west and east of NE 33rd Ave., respectively. Neighborhoods bordering Concordia are Woodlawn, Vernon, and Sabin on the west, Sunderland on the north, Cully on the east, and Alameda and Beaumont-Wilshire on the south.

Portland, Oregon is divided into six sections: North Portland, Northeast Portland, Northwest Portland, South Portland, Southeast Portland, and Southwest Portland. There are 95 officially recognized neighborhoods, each of which is represented by a volunteer-based neighborhood association. No neighborhood associations overlap the Willamette River, but a few overlap the addressing sextants. For example, most addresses in the South Portland Neighborhood Association are South, but a portion of the neighborhood is west of SW View Point Terrace where addresses have a SW prefix. Similarly the Buckman Neighborhood Association spans both NE and SE Portland.