Geochemical and petrological data are reported for phonolites from the Lužické hory Mts. in the northeastern part of the Ohře (Eger) Rift near the junction with the Lusatian Fault. The rocks are collectively enriched in incompatible trace elements such as Rb, REEs, Zr, Hf, U, Th, Nb, Ta (concentrated mainly in hainite, Nb-rich titanite and aegirine) and volatile components such as F and Cl. On the other hand, the phonolites are significantly depleted in Ti and P and partly also in Sr and Ba contents. The K–Ar dating provided scattered ages in the range from 34 to 27 Ma. Two geochemically different phonolite types were recognized: (i) type A (higher Sr>90 ppm, Ba>130 ppm) having initial ⁸⁷Sr/⁸⁶Sr = 0.7032–0.7094 and ε_Nd = 2.9–3.4, similar to those phonolites that are predominant in the nearby České středohoří Mts., and (ii) prevailing type B with lower contents of Sr<20 ppm and Ba<60 characterized by a decoupled Sr–Nd systematics (initial ⁸⁷Sr/⁸⁶Sr ratios up to ~0.714) at narrow ε_Nd of 3.2–3.8. Yet, both phonolite types exhibit relatively restricted variations in initial ²⁰⁶Pb/²⁰⁴Pb (19.2–19.5), ²⁰⁷Pb/²⁰⁴Pb (15.61–15.66) and ²⁰⁸Pb/²⁰⁴Pb (39.07–39.30), indicating their derivation from a similar metasomatically enriched mantle source. The observed geochemical characteristics of the studied phonolites can be best explained by (i) variable degree of clinopyroxene and feldspar fractional crystallization from primary basanitic magma, (ii) degree of assimilation-fractional crystallization (AFC) processes during the magma ascent, and/or (iii) late-magmatic to post-magmatic hydrothermal processes related to selective enrichment of some incompatible elements.