I know a lot of readers who fancy entering a photo competition and either don’t know what’s open or don’t get around to it.  To help, here’s a list to get you started, in order of closing date.
Please let me know of any others you are aware of in the comments below as I update the page regularly. I must just add, that many of them provide feedback on your entered images and they are worth entering just to receive that.

Life Framer
Monthly calls for entries, each month with its own topic, each overseen by a world-renowned photographer or industry professional.
Monthly winners receive online exposure and $2000 in cash prizes.  Varying costs to enter, but $100 for 12 months membership gives 10 entries to each month’s topic.
At the end of the year winners are exhibited in shows in New York, Paris, Rome and Tokyo.
closes 29 February: World travellers
closes 31 March: Open

Sony Community
Monthly(ish) themed competition.
Current theme: Environment, closes 23 Feb 2020, max 25 entries per person

SheClicks Community
Monthly themed competition.
Current theme: reflections (closes end Feb)

All About Photo Awards 2020
Close date extended to 8 February 2020
Open to all types of photography. Enter up to 40 images. Entry costs $30 for the 3 first images, then $5 for each additional image. Prizes include $5000 grand prize, other monetary prizes, appearance in Daylighted’s digital traveling exhibition worldwide and feature in AAP Magazine.

Pink Lady Food Photographer 2020
Closes 9 February 2020
There is a wide range of categories to enter (e.g. Street Food; Politics of Food; Food in the Field; …) and no limit on the number of entries you make.

Portrait Awards 2020
Closes 19 Feb 2020 (free entry of single image closes 29 Jan)

PhMuseum 2020
Closes 20 Feb 2020
£30 entry fee for 8-20 photos from one or more projects (early bird fee of £20 closes 30 January)

International Women Photographer’s Award
Closes 29 Feb 2020
Free entry of portfolio and supporting document.

Landscape Photographer of the Year
Closes 5 Apr 2020
British landscapes in all their forms, including outdoor urban and suburbant.

LIP Annual Exhibition
Dates for submission TBA but probably June 2020
LIP members only – submission of images, phonebooks and zines. To have been created since January 2018.

Monochrome Awards
Closes 15 Nov 2020
Monochrome images under a wide range of themes. Amateur winner receives $1000 and publication in the annual awards book.

Street Photography Awards 2019

Closed 30 June 2019

Countryfile Photographic Competition 2019

Hariban Award
Closed 15 July 2019 (extended from 30 June).

Sony World Photography Award 2020 – Open Competition
Closed 7 January 2020, shortlist 25 Feb, awards 16 April.
Sony 2021 opens 1 June 2020.
Enter up to 3 images for free. Enter into any combination of the following categories: Architecture; Culture; Creative; Motion; Landscape; Natural World and Wildlife; Portraiture; Still Life; Street Photography; Travel.
All images must have been taken during 2019.

Europe security photos
Due again May-July 2020

Open Walls Arles
Closed 1 August 2019 (and extended)
The themes were growth and daily life – results update due Jan 2020.

Sony α Instagram Competition –  Animal Portrait 
Valid for photos posted 15 May – 17 July 2019

2019 Women Photographers’ Grant
Closed 10 October 2019

Travel Photographer of the Year
Closed 15 October 2019

International Landscape Photographer of the Year
Closed 15 October 2019

British Photography Awards
Closed 31 October 2019. Start of public voting on 4 December 2019.
Awards to be announced at London event 4 February 2020

Fujiholics Photographer of the Year

Monochrome Awards 2019
Closed 17 November 2019. Awards to be announced 12 January 2020

Wanderlust Photo of the Year
Closes 30 November 2019.
You may enter up to four photos in TOTAL, spread across the four categories, as you wish:  People; Wildlife; Landscape; Travel Icons.
Entry is open to amateur photographers only and is free to enter. Entries must be A3 proportion.
The prizes include a photographic trip to Texas.

Smithsonian Photo Contest 2019
Closes 30 November 2019
Enter up to 15 images in each category, to a total of 90 submissions. The categories are: The American Experience; Natural World; People; Travel; Altered Images; Mobile.

Wellcome Photography Prize 2020
Closed 16 December 2019
Free to enter. There are five categories: Social Perspectives (single image); Hidden Worlds (single image); Medicine in Focus (single image); Mental Health (single image); Mental Health (series of up to five images).

Portrait of Humanity
Closes 21 Jan 2020