Seongdong-dong, Gyeongju

{{Infobox settlement

| name = Seongdong-dong

| translit_lang1 = Korean

| translit_lang1_type = Hangul

| translit_lang1_info = 성동동

| translit_lang1_type1 = Hanja

| translit_lang1_info1 = 城東洞

| translit_lang1_type2 = {{nowrap|Revised Romanization}}

| translit_lang1_info2 = Seongdong-dong

| translit_lang1_type3 = {{nowrap|McCune–Reischauer}}

| translit_lang1_info3 = Songtong-tong

| translit_lang2 =

| translit_lang2_type = Hangul

| translit_lang2_info =

| translit_lang2_type1 = Hanja

| translit_lang2_info1 =

| translit_lang2_type2 = {{nowrap|Revised Romanization}}

| translit_lang2_info2 =

| translit_lang2_type3 = {{nowrap|McCune–Reischauer}}

| translit_lang2_info3 =

| image_skyline =

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| subdivision_type = Country

| subdivision_name = South Korea

| subdivision_type1 = Region

| subdivision_name1 = Gyeongju

| seat_type = Capital

| seat =

| parts_type =

| parts_style = para

| p1 =

| government_type = Gyeongju City

| leader_title = Mayor

| leader_name =

| area_footnotes =

| area_total_km2 = 0.64

| elevation_footnotes =

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| population_footnotes = {{cite web|url=http://www.encyber.com/search_w/ctdetail.php?masterno=733269&contentno=733269 |title=성동동 Seongdong-dong 城東洞 |publisher=Doosan Encyclopedia |language=Korean |accessdate=2009-08-18}}

| population_total = 4672

| population_as_of = 2008

| population_density_km2 = auto

| blank_name_sec1 = Dialect

| blank_info_sec1 = Gyeongsang dialect

| footnotes =

}}

Seongdong-dong was a dong or a neighbourhood of the Gyeongju City, North Gyeongsang province, South Korea. It was bordered by Dongcheon-dong on the east, Seongnae-dong on the west, Hwango-dong on the south and Yonggang-dong on the north. Its 0.64 square kilometers were home to about 4672 people. It was both an administrative dong and legal dong.