- 21053 is a Postal Code in Baltimore County.
- 21053 is a Postal Code.
21053 a.k.a. Melbourne: Georgian House is a publisher.
- 21053 a.k.a. Emex spinosa, commonly known as "devil's thorn" is an annual herbaceous plant of the Polygonaceae. It originates in the warmer parts of the old world, but now has spread with man to other places. It is common in disturbed areas, aspecially in sandy soils. It has shown some weedy behaviour in restricted areas within southern Australia.
- 21053 a.k.a. Willie's Wonky Chocolate Factory: Willie's Wonky Chocolate Factory is a United Kingdom television documentary series broadcast on Channel 4 in March 2008. Filmed in "fly-on-the-wall" style, it shows the efforts of Willie Harcourt-Cooze to establish a brand of 100% cacao chocolate in the UK.