Wellesley County

{{Short description|Administrative area in New South Wales, Australia}}

{{Use Australian English|date=August 2019}}

{{Use dmy dates|date=January 2025}}

{{GeoGroup}}

{{Infobox Australian place

| type = cadastral

| name = Wellesley

| state = nsw

| image = Wellesley NSW.PNG

| caption = Location in New South Wales

| near-nw = Wallace

| near-n = Beresford

| near-ne = Auckland

| near-e = Auckland

| near-se = Auckland

| near-s = Croajingolong (Vic)

| near-sw = Tambo (Vic)

| near-w = Wallace

}}

Wellesley County is one of the 141 cadastral divisions of New South Wales. It is located along the border with Victoria, with the Snowy River part of the northern boundary. It includes Bombala.

Wellesley County was named in honour of Governor General of India Richard Colley Wellesley, Marquis Wellesley (1760–1842).{{NSW GNR|id = SXIOZxWATR|title = Wellesley|accessdate = 11 August 2013}}