Aderklaa, Lower Austria, municipality in the district of Gaenserndorf, alt. 157 m, pop. 210 (1981 pop. 155), area 8.63 km2, at the northeast edge of the city of Vienna, in the Marchfeld area. - Natural gas exploitation (OMV). - Modern church (1963-65) by K. Eckel and S. Stein with glass windows by J. Mikl.