NZR WA class

{{Use New Zealand English|date=July 2024}}

{{DISPLAYTITLE:NZR W^A class }}

{{Use dmy dates|date=July 2019}}

{{Infobox locomotive

| name=NZR WA class

| powertype=Steam

| image=Locomotive Wa165 on Gisborne City Vintage Railway 1.jpg

| caption=Wa165 on Gisborne City Vintage Railway

| builddate=1892-1903

| builder= NZR Addington Workshops, Hillside Workshops

| locoweight= {{convert|37.2|LT|t ST|lk=on}}

| whytetype= 2-6-2T

| firstrundate=1892

| disposition= Withdrawn, 1 preserved

| numinclass= 15 (11 new, 4 rebuilt)

| weightondrivers= {{convert|26.2|LT|t ST|lk=on}}

| wheelbase= {{convert|22|ft|3|in|m|2|abbr=on}}

| boilerpressure= {{convert|170|psi|kPa|0|abbr=on}}
{{convert|160|psi|kPa|0|abbr=on}} (nos 120, 262)

| gauge= {{RailGauge|3ft6in|lk=on}}

| currentowner= Gisborne City Vintage Railway (1)

| wheeldiameter= {{convert|39.75|in|m|3|abbr=on}}
{{convert|42.5|in|m|3|abbr=on}} on rebuilt locos

| cylindercount= Two

| cylindersize = {{convert|14|x|20|in|0|abbr=on}}

| poweroutput=

| tractiveeffort= {{convert|13420|lbf|kN|abbr=on|lk=on}}
{{convert|11810|lbf|kN|abbr=on}} (rebuilt locos)

| maxspeed=

| retiredate= 1929-1962

| restoredate=

| scrapdate= 1962

| locale= All of New Zealand

| fleetnumbers=

| length= {{convert|29|ft|8|in|m|2|abbr=on}}

| fueltype= Coal

| watercap= {{convert|950|impgal|L USgal|abbr=on}}

| fuelcap= {{convert|2|LT|t ST|1|lk=on}}

| firearea= {{convert|12.0|sqft|m2|abbr=on}}
{{convert|11|sqft|m2|abbr=on}} (nos 120, 262)

| totalsurface= {{convert|738|sqft|m2|abbr=on}}
{{convert|556|sqft|m2|abbr=on}} (nos 120, 262)

| superheaterarea=

}}

The NZR W^A class locomotives were a class of tank locomotive built by New Zealand Railways (NZR). Eleven were built at NZR's own Addington Workshops in Christchurch and Hillside Workshops in Dunedin. Four more were converted from old J class 2-6-0 locomotives.{{sfn|Palmer|Stewart|1965|p=35}}{{sfn|Lloyd|1974|p=50–109}}{{sfn|Stewart|1974|p=141}}

Three were fitted with brakes to assist descent on the Fell-operated Rewanui and Roa inclines on the South Island's West Coast Region. These were among the last in use.